Insert performance
Hi guys,
I have a web application running on Oracle 9.2.0.7. This application inserts one row in a specific table for auditing purposes in every click of the user.
The problem is that some periods of the day there are too many users using that app and there is too many inserts in the audit table.
So, I am doing some configurations to improve performance for that particular process.
1) Created a 16K tablespace and move the audit table
2) Altered the audit table with PCTFREE and PCTUSED to 0
3) Altered the audit table with FREELIST = 2
4) Certified that there is no triggers or idexes on that table.
My question is: There is another thing that I can do? What about using hint APPEND to the insert statement on the application?
Thanks in advance,
Paulo.
Thank you Jaffar!
I read an article of Dan Burleson about using multiple freelist x ASSM (http://www.rampant-books.com/phys_81.htm) which tells that using multiple freelist can be better than ASSM. But, I am thinking now in using ASSM, as you suggest. It will be, also, more easy to handle the tablespace, right?
So, If I will use the ASSM, I will not be able to configure the PCTFREE and PCTUSED, right?
Have you think of partitioning this table? This will give you good results mainly for the tables which large amount of dataI am on Standard Edition! Not able to use the Partitioning...
APPEND hint is used for direct load/inserts.So, it cannot be used in a statement default? "insert into xxxx values xxxx" ?
Thanks again,
Paulo.
Similar Messages
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Bad INSERT performance when using GUIDs for indexes
Hi,
we use Ora 9.2.0.6 db on Win XP Pro. The application (DOT.NET v1.1) is using ODP.NET. All PKs of the tables are GUIDs represented in Oracle as RAW(16) columns.
When testing with mass data we see more and more a problem with bad INSERT performance on some tables that contain many rows (~10M). Those tables have an RAW(16) PK and an additional non-unique index which is also set on a RAW(16) column (both are standard B*tree). An PerfStat reports tells that there is much activity on the Index tablespace.
When I analyze the related table and its indexes I see a very very high clustering factor.
Is there a way how to improve the insert performance in that case? Use another type of index? Generally avoid indexed RAW columns?
Please help.
DanielHi
After my last tests I conclude at the followings:
The query returns 1-30 records
Test 1: Using Form Builder
- Execution time 7-8 seconds
Test 2: Using Jdeveloper/Toplink/EJB 3.0/ADF and Oracle AS 10.1.3.0
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Test 3: Using JDBC/ADF and Oracle AS 10.1.3.0
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When I use:
session.setLogLevel(SessionLog.FINE) and
session.setProfiler(new PerformanceProfiler())
I don’t see any improvement in the execution time of the query.
Thank you
Thanos -
Hi Experts ,
1. could someone guide me on understanding what are things that impact insert performance in an oltp application with ~25 concurrent sessions doing 20 inserts/session into table X. ? (env- oracle 11g ,3 node RAC , ASSM tablespace , tables X is range partitioned )
2. If any storage parameter is not property set then how to identify which one needs to be fixed?
Note: current insert performance is : 0.02 sec/insert.Hi Garry,
Thanks for your response.
some more info regarding app : DB version 11.2.0.3 . Below is the awr info during peak load for 1 hr snap. any suggestions are helpful.
Cache Sizes Begin End
~~~~~~~~~~~ ---------- ----------
Buffer Cache: 18,624M 18,624M Std Block Size: 8K
Shared Pool Size: 3,200M 3,200M Log Buffer: 25,888K
Load Profile Per Second Per Transaction Per Exec Per Call
~~~~~~~~~~~~ --------------- --------------- ---------- ----------
DB Time(s): 4.9 0.0 0.01 0.00
DB CPU(s): 0.5 0.0 0.00 0.00
Redo size: 585,778.7 2,339.6
Logical reads: 24,046.6 96.0
Block changes: 2,374.5 9.5
Physical reads: 1,101.6 4.4
Physical writes: 394.6 1.6
User calls: 2,086.6 8.3
Parses: 9.5 0.0
Hard parses: 0.5 0.0
W/A MB processed: 5.8 0.0
Logons: 0.6 0.0
Executes: 877.7 3.5
Rollbacks: 218.6 0.9
Transactions: 250.4
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 99.99 Redo NoWait %: 99.99
Buffer Hit %: 95.44 In-memory Sort %: 100.00
Library Hit %: 99.81 Soft Parse %: 95.16
Execute to Parse %: 98.92 Latch Hit %: 99.89
Parse CPU to Parse Elapsd %: 92.50 % Non-Parse CPU: 97.31
Shared Pool Statistics Begin End
Memory Usage %: 75.36 74.73
% SQL with executions>1: 90.63 90.41
% Memory for SQL w/exec>1: 83.10 85.49
Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Event Waits Time(s) Avg(ms) %DBtime Wait Class
db file sequential read 3,686,200 15,658 4 87.7 User I/O
DB CPU 1,802 10.1
db file parallel read 19,646 189 10 1.1 User I/O
gc current grant 2-way 842,079 145 0 .8 Cluster
gc current block 2-way 425,663 106 0 .6 Cluster -
Jdbc thin driver bulk binding slow insertion performance problem
Hello All,
We have a third party application reporting slow insertion performance, while I traced the session and found out most of elapsed time for one insert execution is sql*net more data from client, it appears bulk binding is being used here because one execution has 200 rows inserted. I am wondering whether this has something to do with their jdbc thin driver(10.1.0.2 version) and our database version 9205. Do you have any similar experience on this, what other possible directions should I explore?
here is the trace report from 10046 event, I hide table name for privacy reason.
Besides, I tested bulk binding in PL/SQL to insert 200 rows in one execution, no problem at all. Network folks confirm that network should not be an issue as well, ping time from app server to db server is sub milisecond and they are in the same data center.
INSERT INTO ...
values
(:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17,
:18, :19, :20, :21, :22, :23, :24, :25, :26, :27, :28, :29, :30, :31, :32,
:33, :34, :35, :36, :37, :38, :39, :40, :41, :42, :43, :44, :45)
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.02 14.29 1 94 2565 200
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.02 14.29 1 94 2565 200
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 25
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net more data from client 28 6.38 14.19
db file sequential read 1 0.02 0.02
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 0.00 0.00
********************************************************************************I have exactly the same problem, I tried to find out what is going on, changed several JDBC Drivers on AIX, but no hope, I also have ran the process on my laptop which produced a better and faster performance.
Therefore I made a special solution ( not practical) by creating flat files and defining the data as an external table, the oracle will read the data in those files as they were data inside a table, this gave me very fast insertion into the database, but still I am looking for an answer for your question here. Using Oracle on AIX machine is a normal business process followed by a lot of companies and there must be a solution for this. -
Jdbc thin driver and bulk binding slow insertion performance
Hello All,
We have a third party application reporting slow insertion performance, while I traced the session and found out most of elapsed time for one insert execution is sql*net more data from client, it appears bulk binding is being used here because one execution has 200 rows inserted. I am wondering whether this has something to do with their jdbc thin driver(10.1.0.2 version) and our database version 9205. Do you have any similar experience on this, what other possible directions should I explore?
here is the trace report from 10046 event, I hide table name for privacy reason.
Besides, I tested bulk binding in PL/SQL to insert 200 rows in one execution, no problem at all. Network folks confirm that network should not be an issue as well, ping time from app server to db server is sub milisecond and they are in the same data center.
INSERT INTO ...
values
(:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17,
:18, :19, :20, :21, :22, :23, :24, :25, :26, :27, :28, :29, :30, :31, :32,
:33, :34, :35, :36, :37, :38, :39, :40, :41, :42, :43, :44, :45)
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.02 14.29 1 94 2565 200
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.02 14.29 1 94 2565 200
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 25
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net more data from client 28 6.38 14.19
db file sequential read 1 0.02 0.02
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 0.00 0.00
********************************************************************************I have exactly the same problem, I tried to find out what is going on, changed several JDBC Drivers on AIX, but no hope, I also have ran the process on my laptop which produced a better and faster performance.
Therefore I made a special solution ( not practical) by creating flat files and defining the data as an external table, the oracle will read the data in those files as they were data inside a table, this gave me very fast insertion into the database, but still I am looking for an answer for your question here. Using Oracle on AIX machine is a normal business process followed by a lot of companies and there must be a solution for this. -
I am experiencing performance problems when inserting a 30 MB XML file into an XMLTYPE field - under Oracle 11 with the schema I am using the minimum time I can achieve is around 9 minutes which is too long... can anyone comment on whether this performance is normal and possibly suggest how it could be improved while retaining the benefits of structured storage...thanks in advance for the help :)
sorry for the late reply - I didn't notice that you had replied to my earlier post...
To answer your questions in order:
- I am using "structured" storage because I read ( in this article: [http://www.oracle.com/technology/pub/articles/jain-xmldb.html] ) that this would result in higher xquery performance.
- the schema isn't very large but it is complex. ( as discussed in above article )
I built my table by first registering the schema and then adding the xml elements to the table such that they would be stored in structured storage. i.e.
--// Register schema /////////////////////////////////////////////////////////////
begin
dbms_xmlschema.registerSchema(
schemaurl=>'fof_fob.xsd',
schemadoc=>bfilename('XFOF_DIR','fof_fob.xsd'),
local=>TRUE,
gentypes=>TRUE,
genbean=>FALSE,
force=>FALSE,
owner=>'FOF',
csid=>nls_charset_id('AL32UTF8')
end;
COMMIT;
and then created the table using ...
--// Create the XCOMP table /////////////////////////////////////////////////////////////
create table "XCOMP" (
"type" varchar(128) not null,
"id" int not null,
"idstr1" varchar(50),
"idstr2" varchar(50),
"name" varchar(255),
"rev" varchar(20) not null,
"tstamp" varchar(30) not null,
"xmlfob" xmltype)
XMLTYPE "xmlfob" STORE AS OBJECT RELATIONAL
XMLSCHEMA "fof_fob.xsd"
ELEMENT "FOB";
No indexing was specified for this table. Then I inserted the offending 30 MB xml file using (in c#, using ODP.NET under .NET 3.5):
void test(string myName, XElement myXmlElem)
OracleConnection connection = new OracleConnection();
connection.Open();
string statement = "INSERT INTO XCOMP ( \"name\", \"xmlfob\"") values( :1, :2 )";
XDocument xDoc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"), myXmlElem);
OracleCommand insCmd = new OracleCommand(statement, connection);
OracleXmlType xmlinfo = new OracleXmlType(connection, xDoc.CreateReader());
insCmd.Parameters.Add(FofDbCmdInsert.Name, OracleDbType.Varchar2, 255);
insCmd.Parameters.Add(FofDbCmdInsert.Xmldoc, OracleDbType.XmlType);
insCmd.Parameters[0].Value = myName;
insCmd.Parameters[1].Value = xmlinfo;
insCmd.ExecuteNonQuery();
connection.Close();
It took around 9 minutes to execute the ExecuteNonQuery statement, usingOracle 11 standard edition running under Windows 2008-64 with 8 GB RAM and 2.5 MHZ single core ( of a quad-core running under VMWARE )
I would much appreciate any suggestions that could speed up the insert performance here - as a temporary solution I chopped some of the information out of the XML document and store it seperately in another table, but this approach has the disadvantage that I using xqueries is a bit inflexible, although the performance is now in seconds rather than minutes...
I can't see any reason why Oracle's shredding mechanism should be less efficient than manual shredding the information.
Thanks in advance for any helpful hints you can provide! -
Suggestions to improve the INSERT performance
Hi All,
I have a table which has 170 columns .
I am inserting huge data 50K and more records into this table.
my insert would be look like this.
INSERT INTO /*+ append */ REPORT_DATA(COL1,COL2,COL3,COL4,COL5,COL6)
SELECT DATA1,DATA2,DATA3,DATA4,DATA5,DATA5 FROM TXN_DETAILS
WHERE COL1='CA';
Here i want to insert values for only few columns.Hence i specifies only those column names in insert statement.
But when huge data(50k+) returned by select query then this statement taking very long time to execute(approximately 10 to 15 mins).
Please suggest me to improve this insert statement performance.I am also using 'append' hint.
Thanks in advance.a - Disable/drop indexes and constraints - It's far faster to rebuild indexes after the data load, all at-once. Also indexes will rebuild cleaner, and with less I/O if they reside in a tablespace with a large block size.
b - Manage segment header contention for parallel inserts - Make sure to define multiple freelist (or freelist groups) to remove contention for the table header. Multiple freelists add additional segment header blocks, removing the bottleneck. You can also use Automatic Segment Space Managementhttp://www.dba-oracle.com/art_dbazine_ts_mgt.htm (bitmap freelists) to support parallel DML, but ASSM has some limitations
c - Parallelize the load - You can invoke parallel DML (i.e. using the PARALLEL and APPEND hint) to have multiple inserts into the same table. For this INSERT optimization, make sure to define multiple freelists and use the SQL "APPEND" option. If you submit parallel jobs to insert against the table at the same time, using the APPEND hint may cause serialization, removing the benefit of parallel jobstreams.
d - APPEND into tables - By using the APPEND hint, you ensure that Oracle always grabs "fresh" data blocks by raising the high-water-mark for the table. If you are doing parallel insert DML, the Append mode is the default and you don't need to specify an APPEND hint. Also, if you're going w/ APPEND, consider putting the table into NOLOGGING mode, which will allow Oracle to avoid almost all redo logging."
insert /*+ append */ into customer values ('hello',';there');
e - Use a large blocksize - By defining large (i.e. 32k) blocksizes for the target table, you reduce I/O because more rows fit onto a block before a "block full" condition (as set by PCTFREE) unlinks the block from the freelist.
f - Use NOLOGGING
f - RAM disk - You can use high-speed solid state disk (RAM-SAN) to make Oracle inserts run up to 300x faster than platter disk. -
Truncate Table before Insert--Performance
HI All,
This post is in focus of special requirement where a table is truncated before inserting records in the table.
Now, when a table is truncated the High Water Mark(HWK) is reset to lowest memory allocated for table in tablespace. After this, would insert with append can boost the performance of the insert query?
In simple insert query, the oracle engine consults the free list to look for free spaces.
But in insert with apppend, the engine starts above the HWM. And the argument is when truncate has been executes on table, would the freelist be used in simple insert.
I just need to know if there are any benefits of using append insert on truncated table or simple insert would be same in term of performance with respect to insert with append.
Regards
NitsHi,
if you don't need the data truncate the table. There is no negativ impact whether you are using an conventional path or a direct path insert.
If you use append less redo is written for the table if the table is in NOLOGGING mode, but redo is written for all indexes. I would recommand to create a full backup after that (if needed), because your table will not be recoverable after that (no REDO Information).
Dim -
Can insert performance be improved playing with env parameters?
Below is the environment confioguration and results of my bulk load insert experiments. The results are from two scenarios that is also described below. The values for the two scenarios is separated by a space.
Environment Configuration:
setTxn N
DeferredWrite Y
Sec Bulk Load Y
Post Build SecIndex Y
Sync Y
Column1 value reflects for the scenario:
Two databases
a. Database with 2,500,000 records
b. Database with 2,500,000 records
Column2 value reflects for the scenario:
Two databases
a. Database with 25,000,000 records
b. Database with 25,000,000 records
1. Is there a good documentation which describes what the environment statistics mean.
2. Looking at the statistics below, can you make any suggestions for performance improvement.
Looking at the below statistics is the:
Eviction Stats
nEvictPasses 3929 146066
nNodesSelected 309219 17351997
nNodesScanned 3150809 176816544
nNodesExplicitlyEvicted 152897 8723271
nBINsStripped 156322 8628726
requiredEvictBytes 524323 530566
CheckPoint Stats
nCheckpoints 55 1448
lastCheckpointID 55 1448
nFullINFlush 54 1024
nFullBINFlush 26 494
nDeltaINFlush 116 2661
lastCheckpointStart 0x6f/0x2334f8 0xb6a/0x82fd83
lastCheckpointEnd 0x6f/0x33c2d6 0xb6a/0x8c4a6b
endOfLog 0xb/0x6f22e 0x6f/0x75a843 0xb6a/0x23d8f
Cache Stats
nNotResident 4591918 57477898
nCacheMiss 4583077 57469807
nLogBuffers 3 3
bufferBytes 3145728 3145728
(MB) 3.00 3.00
cacheDataBytes 563450470 370211966
(MB) 537.35 353.06
adminBytes 29880 16346272
lockBytes 1113 1113
cacheTotalBytes 566596198 373357694
(MB) 540.35 356.06
Logging Stats
nFSyncs 59 1452
nFSyncRequest 59 1452
nFSyncTimeouts 0 0
nRepeatFaultReads 31513 6525958
nTempBufferForWrite 0 0
nRepeatIteratorReads 0 0
totalLogSize 1117658932 29226945317
(MB) 1065.88 27872.99
lockBytes 1113 1113Hello Linda,
I am inserting 25,000,000 records of the type:
Database 1
Key --> Data
[long,String,long] --> [{long,long}, {String}}
The secondary keys are on {long,long} and {String}
Database 2
Key --> Data
[long,Integer,long] --> [{long,long}, {Integer}}
The secondary keys are on {long,long} and {Integer}
i set the env parameters to non-transactional and setDeferredWrite(True)
using setSecondaryBulkLoad(true) and then build two Secondary indexes on {long,long} and {String} of the data portion.
private void buildSecondaryIndex(DataAccessLayer dataAccessLayer ) {
try {
SecondaryIndex<TDetailSecondaryKey, TDetailStringKey,
TDetailStringRecord> secondaryIndex =
store.getSecondaryIndex(
dataAccessLayer.getPrimaryIndex() ,
TDetailSecondaryKey.class,
SECONDARY_KEY_NAME
} catch (DatabaseException e) {
throw new RuntimeException(e);
We are inserting to 2 databases as mentioned above.
NumRecs 250,000x2 2,500,000x2 25,000,000x2
TotalTime(ms) 16877 673623 30225781
PutTime(ms) 7684 76636 1065030
BuildSec(ms) 4952 590207 29125773
Sync(ms) 4241 6780 34978Why does building secondaryIndex ( 2 secondary databases in this case) take so much longer than inserting to the primary database - 27 times longer !!!
Its hard to believe that building of the tree for secondary database takes so much longer.
Why doesnt building the tree for primary database take so long. The data in the primary database is same as its key to be able to search on these values.
Hence its surprising it takes so long
The cache stats mentioned above relate to these .
Can you try explaining this. We are trying to figure out is it worth trying to build the secondary index later for bulk loading. -
Improve Database adapter insert performance
Hopefully this is an easy question to answer. I'm getting passed to my BPEL over 8,000 records and I need to take those records and then insert them into an Oracle database. I've been trying to tune the insert by using properties like inMemoryOptimization, but the load still takes severl hours. Any suggestions on how to get the Database adapter to perform better or load all 8,000 records at once? thanks in advance.
Hello.
8000 records doesn't sound "huge", unless a record is say 1 kB then you have 8 MB, which is a large payload to move around in one piece.
A DB merge is typically slower than an insert, though you did say you were using an insert.
If you are inserting each row one at a time that seems like it would be pretty slow.
Normally the input to a DB adapter insert is a collection (of rows) vs. a single row. If you have been handed 8000 individual rows you can assemble them into a collection with an iteration - tedious in BPEL but works fine.
Daren -
Oracle 10g Merge Insert performance
Hi All,
Performance wise, is it better to use a regular insert statement or Merge (insert only) statement ... in Oracle10g. (no updates are used in this merge statement).
Thanks for the input.thanks for the comment ... here is the more info for INSERT alone using Merge ... thought Oracle has a reason for this to add in 10g.
http://www.oracle-developer.net/display.php?id=310
I am looking for right answer about the performance -
Hi,
In my database there is one table which size is 500MB and on that table there is 5 indexes (2 are composite index).
Through sql loader 15 to 20 batch files are running and those job are inserting into this table. Means there is high insertion on this table. PCTFREE of this table is 10% and PCTUSED is default.
But insertion on this table is taking some time, even 10000 rows are taking more time to insert.
Please help.
AnandYou can improve the performance of SQL*Loader on conventional loads in a number of ways:
*Increase the readsize, I use 20971520 which may be the maximum
*Increase the number of rows per commit to 1000 or even 10000 (default 64)
*Increase the bindsize used to hold the values read from the data file, again I use 20971520
SQL*Loader will use array inserts, so that one INSERT statement will be sent to the database server with many data records in a single round trip, rather than one round trip per data record. This is a big performance boost. Increasing the parameters I have listed will increase the array size, increasing efficiency and reducing the number of separate array inserts issued by SQL*Loader.
Another option to test, is to drop the 5 indexes on the table, load the new data, then recreate the 5 indexes. Without the 5 indexes the load and insert of the new records will happen much faster. And the updating of the indexes could be a cause of contention between multiple, concurrent SQL*Loaders and slowing down the inserts. Depending on how big the table is, it might not take that long to recreate the indexes.
Of course, with triggers spread around your database, you cannot remove the indexes if they are needed by any of the triggers themselves fired by the data being loaded for fast execution. And of course, no other part of the application should be running either.
John -
Question on PL/SQL / Insert Performance
So I have a table (TABLEA) with one column that has approximately 420k records and a I have a second table (TABLEB) that stores data identified by a procedure.
I have a PL/SQL Package with the two procedures.
With the package I pass it two parameters (start and stop number).
execute id_pkg.mrs(0,10000);These numbers are used to capture information into a CURSOR like this.
I then have another procedure GET_CV that takes the value passed from emp_cur_mrs.ID and loops through each record to populate TABLEB. TABLEB is created with "NOLOGGING".
for empi_cur_mrs in
select id into v_tmpmrn from sourcemrns where id > startid and id < endid)
loop
get_cv(empi_cur_mrs.id);
end loop;When I run this against my first 10k records it takes approximately 22 seconds to complete. As I move I continue to add more data when identifying the next 10k records (e.g. execute id_pkg.mrs(10000,20000) the performance begins to drop.
Here is the "insert" code that is stored within the GET_CV procedure.
insert /*+ APPEND */ into TABLEB(fullrec) values(v_fullrecord);Can anyone provide me with any ideas on why this could be happening?Okay, this is a basic structure of what I pull and the end result of the GET_CV. I want to populate the end result into a table.
MEMBER_TBL (IDENTIFIES MEMBERS FROM ALL SOURCES; INTERNAL ID IS UNIQUE in MEMBER_TBL AND ID COULD BE SAME IN MULTIPLE SOURCES:
INTERNALID SRCID ID
10 100 1200
13 120 3543
14 140 1354
15 300 10980
MEMLINKED_TBL (IDENTIFIES WHICH MEMBERS ARE LINKED)
INTERNALID LINKID
10 10
13 10
14 10
15 12
MEMNAME_TBL (NAMEID: 12=MEMBER NAME, 13=EMERGENCY CONTACT NAME, I ONLY WANT MEMBER NAME): A-active I-inactive
INTERNALID NAMEID NAME STATUS MODIFIED_KEY
10 12 SMITH,JOHN A 222
10 12 SMIT,JON I 099
10 13 JONES,JIM A 222
13 12 SMITH,J A 111
14 12 SMITH,JON A 212
13 13 Thomas,Train A 345The max number MODIFIED_KEY tells us the latest updated one (e.g. INTERNALID with Modified_key of 222 would be the latest for NAMEID=12)
MEMPHONE_TBL (PHONEID:11 IS HOMEPHONE AND 55=EMERGENCY PHONE)
INTERNALID PHONEID PHONE_AREA PHONE_NUMBER MODIFIED_KEY STATUS
10 11 800 8889999 133123 A
10 11 800 8880000 000001 I
10 55 888 7729999 323431 A
13 11 888 7739999 123243 A
14 55 888 7769999 454534 AI pass the pl/sql or sql the SRCID and the ID, I then need to look at all the members linked to that one and get the lastest information.
For example, I pass it INTERNALID of '10',ID of '1200' and SRCID of '100' and expect to get back the LINKID from MEMLINKED_TBL, most recent NAME from MEMNAME_TBL and MEMPHONE_TBL.
I would get the following:
LINKID NAME HOMEPHONE
10 SMITH,JOHN 8008889999If I could pull this all together without passing in an "ID", that would be great. I could not figure out how without actually passing it the ID and SRCID.
Thanks for any guidance! -
Insert performance on a table with schema based XMLType column
Hi,
We are inserting around 500K rows into a table which has one XMLType column (schema based). Schema is simple and the size of the XMLType column is also not very large (on an average only around 100 bytes (max might be around 1k-2k), but it takes around 1 hr for every 20K rows, which seems very slow.
The schema is like this :
<schema targetNamespace="http://www.citadon.com/xml/test.xsd"
xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:xdb="http://xmlns.oracle.com/xdb"
xdb:storeVarrayAsTable="true"
version="1.0" elementFormDefault="qualified">
<element name="cas">
<complexType>
<sequence>
<element name="ca" minOccurs="0" maxOccurs="unbounded">
<complexType>
<sequence>
<element name="id" type="string"/>
<element name="value" type="string"/>
</sequence>
</complexType>
</element>
</sequence>
</complexType>
</element>
</schema>
Any thoughts on how to improve performance?
-SriniYou need to have sufficient data.. Also the event show in the following code may help depending on the nature of the query....
Note in the PurchaseOrder Example if I only have 133 docs, instead of 10,000 I will get tablescan and index full scans
C:\oracle\xdb\bugs\xdbBasicDemo>sqlplus /nolog @testcase XDBTEST XDBTEST
SQL*Plus: Release 10.1.0.3.0 - Production on Fri Aug 27 22:57:36 2004
Copyright (c) 1982, 2004, Oracle. All rights reserved.
SQL> spool testcase.log
SQL> set trimspool on
SQL> connect &1/&2
Connected.
SQL> --
SQL> set timing on
SQL> set long 10000
SQL> set pages 10000
SQL> set feedback on
SQL> set lines 132
SQL> set pages 50
SQL> --
SQL> drop index iPartNumberIndex
2 /
Index dropped.
Elapsed: 00:00:02.25
SQL> alter index LINEITEM_LIST rebuild
2 /
Index altered.
Elapsed: 00:00:02.15
SQL> desc PURCHASEORDER
Name Null? Type
TABLE of SYS.XMLTYPE(XMLSchema "http://localhost:8080/home/SCOTT/poSource/xsd/purchaseOrder.xsd" Element "Pu
ject-relational TYPE "PURCHASEORDER_T"
SQL> --
SQL> col level format 99999
SQL> col parent_table_column format A32
SQL> col table_name format A32
SQL> col table_type_name format A32
SQL> --
SQL> select level, PARENT_TABLE_COLUMN, TABLE_TYPE_NAME, TABLE_NAME
2 from USER_NESTED_TABLES
3 connect by PRIOR TABLE_NAME = PARENT_TABLE_NAME
4 start with PARENT_TABLE_NAME = 'PURCHASEORDER'
5 /
LEVEL PARENT_TABLE_COLUMN TABLE_TYPE_NAME TABLE_NAME
1 "XMLDATA"."ACTIONS"."ACTION" ACTION_V ACTION_TABLE
1 "XMLDATA"."LINEITEMS"."LINEITEM" LINEITEM_V LINEITEM_TABLE
2 rows selected.
Elapsed: 00:00:13.60
SQL> desc LINEITEM_T
LINEITEM_T is NOT FINAL
Name Null? Type
SYS_XDBPD$ XDB.XDB$RAW_LIST_T
ITEMNUMBER NUMBER(38)
DESCRIPTION VARCHAR2(256 CHAR)
PART PART_T
SQL> --
SQL> desc PART_T
PART_T is NOT FINAL
Name Null? Type
SYS_XDBPD$ XDB.XDB$RAW_LIST_T
PART_NUMBER VARCHAR2(14 CHAR)
QUANTITY NUMBER(12,2)
UNITPRICE NUMBER(8,4)
SQL> --
SQL> select count(*)
2 from purchaseorder
3 /
COUNT(*)
10000
1 row selected.
Elapsed: 00:00:05.31
SQL> select count(*)
2 from purchaseorder,
3 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
4 /
COUNT(*)
148814
1 row selected.
Elapsed: 00:09:40.54
SQL> create index iPartNumberIndex
2 on LINEITEM_TABLE l
3 ( l.PART.PART_NUMBER,NESTED_TABLE_ID)
4 /
Index created.
Elapsed: 00:00:36.11
SQL> explain plan for
2 select count(*)
3 from purchaseorder
4 where existsNode(object_value,'/PurchaseOrder/LineItems/LineItem[Part/@Id="717951002372"]') = 1
5 /
Explained.
Elapsed: 00:00:01.14
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 2571550067
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 116 | 93 (2)| 00:00:02 |
| 1 | SORT AGGREGATE | | 1 | 116 | | |
| 2 | NESTED LOOPS | | 25 | 2900 | 93 (2)| 00:00:02 |
| 3 | SORT UNIQUE | | 25 | 1675 | 79 (0)| 00:00:01 |
|* 4 | INDEX UNIQUE SCAN | LINEITEM_DATA | 25 | 1675 | 79 (0)| 00:00:01 |
|* 5 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | | 3 (0)| 00:00:01 |
|* 6 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 49 | 1 (0)| 00:00:01 |
|* 7 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
4 - access("SYS_NC00011$"='717951002372')
5 - access("SYS_NC00011$"='717951002372')
6 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-in
stance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-propert
ies/><read-contents/></privilege>''))=1)
7 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
26 rows selected.
Elapsed: 00:00:03.12
SQL> select count(*)
2 from purchaseorder
3 where existsNode(object_value,'/PurchaseOrder/LineItems/LineItem[Part/@Id="717951002372"]') = 1
4 /
COUNT(*)
33
1 row selected.
Elapsed: 00:00:04.63
SQL> select count(*)
2 from purchaseorder,
3 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
4 where existsNode(value(l),'/LineItem[Part/@Id="717951002372"]') = 1
5 /
COUNT(*)
33
1 row selected.
Elapsed: 00:00:00.32
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 2571550067
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 116 | 93 (2)| 00:00:02 |
| 1 | SORT AGGREGATE | | 1 | 116 | | |
| 2 | NESTED LOOPS | | 25 | 2900 | 93 (2)| 00:00:02 |
| 3 | SORT UNIQUE | | 25 | 1675 | 79 (0)| 00:00:01 |
|* 4 | INDEX UNIQUE SCAN | LINEITEM_DATA | 25 | 1675 | 79 (0)| 00:00:01 |
|* 5 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | | 3 (0)| 00:00:01 |
|* 6 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 49 | 1 (0)| 00:00:01 |
|* 7 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
4 - access("SYS_NC00011$"='717951002372')
5 - access("SYS_NC00011$"='717951002372')
6 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-in
stance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-propert
ies/><read-contents/></privilege>''))=1)
7 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
26 rows selected.
Elapsed: 00:00:00.04
SQL> explain plan for
2 select extractValue(object_value,'/PurchaseOrder/Reference')
3 from purchaseorder,
4 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
5 where existsNode(value(l),'/LineItem[Part/@Id="717951002372"]') = 1
6 /
Explained.
Elapsed: 00:00:00.07
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 713363872
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 25 | 8000 | 104 (0)| 00:00:02 |
| 1 | NESTED LOOPS | | 25 | 8000 | 104 (0)| 00:00:02 |
|* 2 | INDEX UNIQUE SCAN | LINEITEM_DATA | 25 | 1675 | 79 (0)| 00:00:01 |
|* 3 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | | 3 (0)| 00:00:01 |
|* 4 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 253 | 1 (0)| 00:00:01 |
|* 5 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("SYS_NC00011$"='717951002372')
3 - access("SYS_NC00011$"='717951002372')
4 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-i
nstance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-proper
ties/><read-contents/></privilege>''))=1)
5 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
24 rows selected.
Elapsed: 00:00:00.04
SQL> select extractValue(object_value,'/PurchaseOrder/Reference')
2 from purchaseorder,
3 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
4 where existsNode(value(l),'/LineItem[Part/@Id="717951002372"]') = 1
5 /
EXTRACTVALUE(OBJECT_VALUE,'/PU
MWEISS-20030616154327385GMT
NSARCHAN-20030703170041824GMT
HBAER-20030206173836987GMT
LOZER-20031110131149107GMT
WTAYLOR-20030120174534374GMT
MHARTSTE-20031103172937613GMT
KGEE-20030919215826550GMT
PSULLY-20030712141634504GMT
JPATEL-20030630175356693GMT
RMATOS-2003072920455000GMT
DRAPHEAL-20030528180033254GMT
JRUSSEL-20031121213026539GMT
PTUCKER-20030918160532301GMT
SVOLLMAN-20031027120838903GMT
WGIETZ-20030208185026303GMT
TFOX-20030110164614994GMT
JPATEL-20030304214301386GMT
GGEONI-20030606135257846GMT
STOBIAS-20030817120358785GMT
COLSEN-20030525200717658GMT
SBAIDA-20030224182546606GMT
IMIKKILI-20030118180347537GMT
ABULL-20030429162730766GMT
NSARCHAN-20031113183134873GMT
LBISSOT-20030809134114505GMT
JKING-20030420162058859GMT
JMALLIN-20030506152048261GMT
AFRIPP-20030311153808601GMT
SHIGGINS-20030831151756257GMT
DBERNSTE-20030626122725631GMT
KPARTNER-20031021160248962GMT
ABANDA-2003062721524842GMT
DOCONNEL-20030904214708637GMT
33 rows selected.
Elapsed: 00:00:00.07
SQL> explain plan for
2 select extractValue(object_value,'/PurchaseOrder/Reference')
3 from purchaseorder
4 where existsNode
5 (
6 object_value,
7 '/PurchaseOrder/LineItems/LineItem/Part[@Id="717951002372"]'
8 ) = 1
9 /
Explained.
Elapsed: 00:00:00.02
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 849879259
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 25 | 8000 | 93 (2)| 00:00:02 |
| 1 | NESTED LOOPS | | 25 | 8000 | 93 (2)| 00:00:02 |
| 2 | SORT UNIQUE | | 25 | 1675 | 79 (0)| 00:00:01 |
|* 3 | INDEX UNIQUE SCAN | LINEITEM_DATA | 25 | 1675 | 79 (0)| 00:00:01 |
|* 4 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | | 3 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 253 | 1 (0)| 00:00:01 |
|* 6 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("SYS_NC00011$"='717951002372')
4 - access("SYS_NC00011$"='717951002372')
5 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-i
nstance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-proper
ties/><read-contents/></privilege>''))=1)
6 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
25 rows selected.
Elapsed: 00:00:00.03
SQL> select extractValue(object_value,'/PurchaseOrder/Reference')
2 from purchaseorder
3 where existsNode
4 (
5 object_value,
6 '/PurchaseOrder/LineItems/LineItem/Part[@Id="717951002372"]'
7 ) = 1
8 /
EXTRACTVALUE(OBJECT_VALUE,'/PU
MWEISS-20030616154327385GMT
NSARCHAN-20030703170041824GMT
HBAER-20030206173836987GMT
LOZER-20031110131149107GMT
WTAYLOR-20030120174534374GMT
MHARTSTE-20031103172937613GMT
KGEE-20030919215826550GMT
PSULLY-20030712141634504GMT
JPATEL-20030630175356693GMT
RMATOS-2003072920455000GMT
DRAPHEAL-20030528180033254GMT
JRUSSEL-20031121213026539GMT
PTUCKER-20030918160532301GMT
SVOLLMAN-20031027120838903GMT
WGIETZ-20030208185026303GMT
TFOX-20030110164614994GMT
JPATEL-20030304214301386GMT
GGEONI-20030606135257846GMT
STOBIAS-20030817120358785GMT
COLSEN-20030525200717658GMT
SBAIDA-20030224182546606GMT
IMIKKILI-20030118180347537GMT
ABULL-20030429162730766GMT
NSARCHAN-20031113183134873GMT
LBISSOT-20030809134114505GMT
JKING-20030420162058859GMT
JMALLIN-20030506152048261GMT
AFRIPP-20030311153808601GMT
SHIGGINS-20030831151756257GMT
DBERNSTE-20030626122725631GMT
KPARTNER-20031021160248962GMT
ABANDA-2003062721524842GMT
DOCONNEL-20030904214708637GMT
33 rows selected.
Elapsed: 00:00:00.04
SQL> alter session set events ='19027 trace name context forever, level 0x800000'
2 /
Session altered.
Elapsed: 00:00:00.00
SQL> explain plan for
2 select count(*)
3 from purchaseorder
4 where existsNode(object_value,'/PurchaseOrder/LineItems/LineItem[Part/@Id="717951002372"]') = 1
5 /
Explained.
Elapsed: 00:00:00.03
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 3049344732
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 69 | 17 (6)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 69 | | |
| 2 | NESTED LOOPS | | 25 | 1725 | 17 (6)| 00:00:01 |
| 3 | SORT UNIQUE | | 25 | 750 | 3 (0)| 00:00:01 |
|* 4 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | 750 | 3 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 39 | 1 (0)| 00:00:01 |
|* 6 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
4 - access("SYS_NC00011$"='717951002372')
5 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-in
stance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-propert
ies/><read-contents/></privilege>''))=1)
6 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
24 rows selected.
Elapsed: 00:00:00.03
SQL> select count(*)
2 from purchaseorder
3 where existsNode(object_value,'/PurchaseOrder/LineItems/LineItem[Part/@Id="717951002372"]') = 1
4 /
COUNT(*)
33
1 row selected.
Elapsed: 00:00:00.01
SQL> select count(*)
2 from purchaseorder,
3 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
4 where existsNode(value(l),'/LineItem[Part/@Id="717951002372"]') = 1
5 /
COUNT(*)
33
1 row selected.
Elapsed: 00:00:00.01
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 3049344732
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 69 | 17 (6)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 69 | | |
| 2 | NESTED LOOPS | | 25 | 1725 | 17 (6)| 00:00:01 |
| 3 | SORT UNIQUE | | 25 | 750 | 3 (0)| 00:00:01 |
|* 4 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | 750 | 3 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 39 | 1 (0)| 00:00:01 |
|* 6 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
4 - access("SYS_NC00011$"='717951002372')
5 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-in
stance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-propert
ies/><read-contents/></privilege>''))=1)
6 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
24 rows selected.
Elapsed: 00:00:00.03
SQL> explain plan for
2 select extractValue(object_value,'/PurchaseOrder/Reference')
3 from purchaseorder,
4 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
5 where existsNode(value(l),'/LineItem[Part/@Id="717951002372"]') = 1
6 /
Explained.
Elapsed: 00:00:00.06
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 1516269755
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 25 | 2450 | 28 (0)| 00:00:01 |
| 1 | NESTED LOOPS | | 25 | 2450 | 28 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | 750 | 3 (0)| 00:00:01 |
|* 3 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 68 | 1 (0)| 00:00:01 |
|* 4 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("SYS_NC00011$"='717951002372')
3 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-i
nstance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-proper
ties/><read-contents/></privilege>''))=1)
4 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
22 rows selected.
Elapsed: 00:00:00.04
SQL> select extractValue(object_value,'/PurchaseOrder/Reference')
2 from purchaseorder,
3 table (xmlsequence(extract(object_value,'/PurchaseOrder/LineItems/LineItem'))) l
4 where existsNode(value(l),'/LineItem[Part/@Id="717951002372"]') = 1
5 /
EXTRACTVALUE(OBJECT_VALUE,'/PU
MWEISS-20030616154327385GMT
NSARCHAN-20030703170041824GMT
HBAER-20030206173836987GMT
LOZER-20031110131149107GMT
WTAYLOR-20030120174534374GMT
MHARTSTE-20031103172937613GMT
KGEE-20030919215826550GMT
PSULLY-20030712141634504GMT
JPATEL-20030630175356693GMT
RMATOS-2003072920455000GMT
DRAPHEAL-20030528180033254GMT
JRUSSEL-20031121213026539GMT
PTUCKER-20030918160532301GMT
SVOLLMAN-20031027120838903GMT
WGIETZ-20030208185026303GMT
TFOX-20030110164614994GMT
JPATEL-20030304214301386GMT
GGEONI-20030606135257846GMT
STOBIAS-20030817120358785GMT
COLSEN-20030525200717658GMT
SBAIDA-20030224182546606GMT
IMIKKILI-20030118180347537GMT
ABULL-20030429162730766GMT
NSARCHAN-20031113183134873GMT
LBISSOT-20030809134114505GMT
JKING-20030420162058859GMT
JMALLIN-20030506152048261GMT
AFRIPP-20030311153808601GMT
SHIGGINS-20030831151756257GMT
DBERNSTE-20030626122725631GMT
KPARTNER-20031021160248962GMT
ABANDA-2003062721524842GMT
DOCONNEL-20030904214708637GMT
33 rows selected.
Elapsed: 00:00:00.01
SQL> explain plan for
2 select extractValue(object_value,'/PurchaseOrder/Reference')
3 from purchaseorder
4 where existsNode
5 (
6 object_value,
7 '/PurchaseOrder/LineItems/LineItem/Part[@Id="717951002372"]'
8 ) = 1
9 /
Explained.
Elapsed: 00:00:00.03
SQL> select plan_table_output from table(dbms_xplan.display('plan_table',null,'serial'))
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 1197255270
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 25 | 2450 | 17 (6)| 00:00:01 |
| 1 | NESTED LOOPS | | 25 | 2450 | 17 (6)| 00:00:01 |
| 2 | SORT UNIQUE | | 25 | 750 | 3 (0)| 00:00:01 |
|* 3 | INDEX RANGE SCAN | IPARTNUMBERINDEX | 25 | 750 | 3 (0)| 00:00:01 |
|* 4 | TABLE ACCESS BY INDEX ROWID| PURCHASEORDER | 1 | 68 | 1 (0)| 00:00:01 |
|* 5 | INDEX UNIQUE SCAN | LINEITEM_LIST | 1 | | 0 (0)| 00:00:01 |
Predicate Information (identified by operation id):
3 - access("SYS_NC00011$"='717951002372')
4 - filter(SYS_CHECKACL("ACLOID","OWNERID",xmltype(''<privilege
xmlns="http://xmlns.oracle.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-i
nstance" xsi:schemaLocation="http://xmlns.oracle.com/xdb/acl.xsd
http://xmlns.oracle.com/xdb/acl.xsd DAV:http://xmlns.oracle.com/xdb/dav.xsd"><read-proper
ties/><read-contents/></privilege>''))=1)
5 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003400035$")
23 rows selected.
Elapsed: 00:00:00.03
SQL> select extractValue(object_value,'/PurchaseOrder/Reference')
2 from purchaseorder
3 where existsNode
4 (
5 object_value,
6 '/PurchaseOrder/LineItems/LineItem/Part[@Id="717951002372"]'
7 ) = 1
8 /
EXTRACTVALUE(OBJECT_VALUE,'/PU
MWEISS-20030616154327385GMT
NSARCHAN-20030703170041824GMT
HBAER-20030206173836987GMT
LOZER-20031110131149107GMT
WTAYLOR-20030120174534374GMT
MHARTSTE-20031103172937613GMT
KGEE-20030919215826550GMT
PSULLY-20030712141634504GMT
JPATEL-20030630175356693GMT
RMATOS-2003072920455000GMT
DRAPHEAL-20030528180033254GMT
JRUSSEL-20031121213026539GMT
PTUCKER-20030918160532301GMT
SVOLLMAN-20031027120838903GMT
WGIETZ-20030208185026303GMT
TFOX-20030110164614994GMT
JPATEL-20030304214301386GMT
GGEONI-20030606135257846GMT
STOBIAS-20030817120358785GMT
COLSEN-20030525200717658GMT
SBAIDA-20030224182546606GMT
IMIKKILI-20030118180347537GMT
ABULL-20030429162730766GMT
NSARCHAN-20031113183134873GMT
LBISSOT-20030809134114505GMT
JKING-20030420162058859GMT
JMALLIN-20030506152048261GMT
AFRIPP-20030311153808601GMT
SHIGGINS-20030831151756257GMT
DBERNSTE-20030626122725631GMT
KPARTNER-20031021160248962GMT
ABANDA-2003062721524842GMT
DOCONNEL-20030904214708637GMT
33 rows selected.
Elapsed: 00:00:00.03
SQL> quit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options -
Insert performance issue with Partitioned Table.....
Hi All,
I have a performance issue during with a table which is partitioned. without table being partitioned
it ran in less time but after partition it took more than double.
1) The table was created initially without any partition and the below insert took only 27 minuts.
Total Rec Inserted :- 2424233
PL/SQL procedure successfully completed.
Elapsed: 00:27:35.20
2) Now I re-created the table with partition(range yearly - below) and the same insert took 59 minuts.
Is there anyway i can achive the better performance during insert on this partitioned table?
[ similerly, I have another table with 50 Million records and the insert took 10 hrs without partition.
with partitioning the table, it took 18 hours... ]
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 4195045590
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 643K| 34M| | 12917 (3)| 00:02:36 |
|* 1 | HASH JOIN | | 643K| 34M| 2112K| 12917 (3)| 00:02:36 |
| 2 | VIEW | index$_join$_001 | 69534 | 1290K| | 529 (3)| 00:00:07 |
|* 3 | HASH JOIN | | | | | | |
| 4 | INDEX FAST FULL SCAN| PK_ACCOUNT_MASTER_BASE | 69534 | 1290K| | 181 (3)| 00:00
| 5 | INDEX FAST FULL SCAN| ACCOUNT_MASTER_BASE_IDX2 | 69534 | 1290K| | 474 (2)| 00:00
PLAN_TABLE_OUTPUT
| 6 | TABLE ACCESS FULL | TB_SISADMIN_BALANCE | 2424K| 87M| | 6413 (4)| 00:01:17 |
Predicate Information (identified by operation id):
1 - access("A"."VENDOR_ACCT_NBR"=SUBSTR("B"."ACCOUNT_NO",1,8) AND
"A"."VENDOR_CD"="B"."COMPANY_NO")
3 - access(ROWID=ROWID)
Open C1;
Loop
Fetch C1 Bulk Collect Into C_Rectype Limit 10000;
Forall I In 1..C_Rectype.Count
Insert test
col1,col2,col3)
Values
val1, val2,val3);
V_Rec := V_Rec + Nvl(C_Rectype.Count,0);
Commit;
Exit When C_Rectype.Count = 0;
C_Rectype.delete;
End Loop;
End;
Total Rec Inserted :- 2424233
PL/SQL procedure successfully completed.
Elapsed: 00:51:01.22
Edited by: user520824 on Jul 16, 2010 9:16 AMI'm concerned about the view in step 2 and the index join in step 3. A composite index with both columns might eliminate the index join and result in fewer read operations.
If you know which partition the data is going into beforehand you can save a little bit of processing by specifying the partition (which may not be a scalable long-term solution) in the insert - I'm not 100% sure you can do this on inserts but I know you can on selects.
The APPEND hint won't help the way you are using it - the VALUES clause in an insert makes it be ignored. Where it is effective and should help you is if you can do the insert in one query - insert into/select from. If you are using the loop to avoid filling up undo/rollback you can use a bulk collect to batch the selects and commit accordingly - but don't commit more often than you have to because more frequent commits slow transactions down.
I don't think there is a nologging hint :)
So, try something like
insert /*+ hints */ into ...
Select
A.Ing_Acct_Nbr, currency_Symbol,
Balance_Date, Company_No,
Substr(Account_No,1,8) Account_No,
Substr(Account_No,9,1) Typ_Cd ,
Substr(Account_No,10,1) Chk_Cd,
Td_Balance, Sd_Balance,
Sysdate, 'Sisadmin'
From Ideaal_Cons.Tb_Account_Master_Base A,
Ideaal_Staging.Tb_Sisadmin_Balance B
Where A.Vendor_Acct_Nbr = Substr(B.Account_No,1,8)
And A.Vendor_Cd = b.company_no
;Edited by: riedelme on Jul 16, 2010 7:42 AM -
(Oracle Database 11g 11.1.0.6.0)
I just ran a test to continually insert child XML nodes into an XML table and found performance slow. As the documentation states, the reason appears to be because the entire XML is being read into memory each time as a DOM before the insert.
My question is whether there is a higher performing means of performing child node inserts?
The test is as follows:
i) Create a non-schema based XML type table:
CREATE TABLE myTable1 (
id NUMBER,
XML_COLUMN XMLType
XMLTYPE COLUMN xml_document store as binary xml
ii) The table is initialized with one row of data:
0, XMLTYPE('<trace-envelope>
<metadata>
<pid>12345</pid>
<date>2008-05-30</date>
</metadata>
</trace-envelope>')
iii) Insert/append successive XML data using the following statement:
UPDATE MyTable1 SET XML_COLUMN = APPENDCHILDXML(XML_COLUMN," +
"'trace-envelope', XMLType('" + traceData + "'))";
where 'traceData' is some new XML data for insertion. The view on the row then becomes (for example):
0, XMLTYPE('<trace-envelope>
<metadata>
<pid>12345</pid>
<date>2008-05-30</date>
</metadata>
<EP>
<priceDate>
2008-05-30
</priceDate>
</EP>
</trace-envelope>')
iv) Continue appending successive child nodes.The only thing I currently can think of is maybe a negative impact of updating / re-balancing the index tree during appending in the XMLType OR structure.
SQL> select * from user_segments where segment_type like '%INDEX%'
2 order by segment_type
3 /
SEGMENT_NAME PARTITION_NAME SEGMENT_TYPE SEGMENT_SU TABLESPACE_NAME BYTES BLOCKS EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS MAX_EXTENTS MAX_SIZE RETENTI MINRETENTION PCT_INCREASE FREELISTS FREELIST_GROUPS BUFFER_
SYS_C004114 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004115 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004116 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004117 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004118 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004120 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004119 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00005$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00011$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00016$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00025$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060324C00003$$ LOBINDEX ASSM USERS 131072 16 2 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060305C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060328C00003$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
15 rows selected.
SQL> select * from user_segments
2 /
SEGMENT_NAME PARTITION_NAME SEGMENT_TYPE SEGMENT_SU TABLESPACE_NAME BYTES BLOCKS EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS MAX_EXTENTS MAX_SIZE RETENTI MINRETENTION PCT_INCREASE FREELISTS FREELIST_GROUPS BUFFER_
ACTION_TABLE NESTED TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060305C00004$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060305C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004114 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
LINEITEM_TABLE NESTED TABLE ASSM USERS 131072 16 2 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004115 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
PURCHASEORDER_OR TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00004$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00005$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00005$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00011$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00011$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00016$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00016$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00025$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00025$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004116 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004117 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004118 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
PURCHASEORDER_CLOB TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060324C00003$$ LOBSEGMENT ASSM USERS 14680064 1792 29 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060324C00003$$ LOBINDEX ASSM USERS 131072 16 2 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004119 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
PURCHASEORDER_CSX TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060328C00003$$ LOBSEGMENT SECUREFILE USERS 327680 40 4 106496 1 2.147E+09 2.147E+09 DEFAULT 0 DEFAULT
SYS_IL0000060328C00003$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004120 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
28 rows selected.
SQL> select dbms_lob.getlength(t.xmldata)
2 as "XMLDocSize"
3 from PURCHASEORDER_CLOB t;
XMLDocSize
73114
1 row selected.
SQL>
SQL> select dbms_lob.getlength(t.object_value.getclobval())
2 as "XMLDocSize"
3 from PURCHASEORDER_CSX t;
XMLDocSize
68682
1 row selected.
SQL>
SQL> select dbms_lob.getlength(t.object_value.getclobval())
2 as "XMLDocSize"
3 from PURCHASEORDER_OR t;
XMLDocSize
85342
1 row selected.
SQL>
SQL> truncate table PURCHASEORDER_CLOB;
Table truncated.
SQL> truncate table PURCHASEORDER_CSX;
Table truncated.
SQL> truncate table PURCHASEORDER_OR;
Table truncated.
SQL> var DOCUMENT VARCHAR2(4000)
SQL> --
SQL> set define off
SQL> --
SQL> begin
2 :DOCUMENT :=
3 '<PurchaseOrder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="PurchaseOrder.xsd">
4 <Reference>AMCEWEN-20030409123336271PDT</Reference>
5 <Actions>
6 <Action>
7 <User>KPARTNER</User>
8 </Action>
9 </Actions>
10 <Reject/>
11 <Requestor>Allan D. McEwen</Requestor>
12 <User>AMCEWEN</User>
13 <CostCenter>S30</CostCenter>
14 <ShippingInstructions>
15 <name>Allan D. McEwen</name>
16 <address>Oracle Plaza
17 Twin Dolphin Drive
18 Redwood Shores
19 CA
20 94065
21 USA</address>
22 <telephone>650 506 7700</telephone>
23 </ShippingInstructions>
24 <SpecialInstructions>Expidite</SpecialInstructions>
25 <LineItems>
26 <LineItem ItemNumber="1">
27 <Description>Traffic</Description>
28 <Part Id="696306038924" UnitPrice="39.95" Quantity="2"/>
29 </LineItem>
30 <LineItem ItemNumber="2">
31 <Description>General Idi Amin Dada</Description>
32 <Part Id="37429166529" UnitPrice="29.95" Quantity="3"/>
33 </LineItem>
34 <LineItem ItemNumber="3">
35 <Description>This is Spinal Tap</Description>
36 <Part Id="715515009126" UnitPrice="39.95" Quantity="3"/>
37 </LineItem>
38 <LineItem ItemNumber="4">
39 <Description>Great Expectations</Description>
40 <Part Id="37429128022" UnitPrice="39.95" Quantity="1"/>
41 </LineItem>
42 <LineItem ItemNumber="5">
43 <Description>The Unbearable Lightness Of Being</Description>
44 <Part Id="37429140222" UnitPrice="29.95" Quantity="2"/>
45 </LineItem>
46 <LineItem ItemNumber="6">
47 <Description>Blood of a Poet</Description>
48 <Part Id="37429147429" UnitPrice="0.0" Quantity="1"/>
49 </LineItem>
50 <LineItem ItemNumber="7">
51 <Description>Juliet of the Spirits</Description>
52 <Part Id="37429165829" UnitPrice="29.95" Quantity="4"/>
53 </LineItem>
54 <LineItem ItemNumber="8">
55 <Description>Insomnia</Description>
56 <Part Id="37429138229" UnitPrice="29.95" Quantity="4"/>
57 </LineItem>
58 <LineItem ItemNumber="9">
59 <Description>Picnic at Hanging Rock</Description>
60 <Part Id="37429126325" UnitPrice="29.95" Quantity="3"/>
61 </LineItem>
62 <LineItem ItemNumber="10">
63 <Description>W.C. Fields - Six Short Films</Description>
64 <Part Id="715515010726" UnitPrice="29.95" Quantity="4"/>
65 </LineItem>
66 </LineItems>
67 </PurchaseOrder>';
68 end;
69 /
PL/SQL procedure successfully completed.
SQL>
SQL> set timing on
SQL> --
SQL> insert into PURCHASEORDER_OR values ( XMLType(:DOCUMENT))
2 /
1 row created.
Elapsed: 00:00:00.06
SQL>
SQL> insert into PURCHASEORDER_CLOB values ( XMLType(:DOCUMENT))
2 /
1 row created.
Elapsed: 00:00:00.01
SQL>
SQL> insert into PURCHASEORDER_CSX values ( XMLType(:DOCUMENT))
2 /
1 row created.
Elapsed: 00:00:00.03
SQL> commit;
Commit complete.
Elapsed: 00:00:00.01
SQL> create or replace synonym PURCHASEORDER for PURCHASEORDER_OR
2 /
Synonym created.
Elapsed: 00:00:00.03
SQL> call appendLineItems(1001,2000)
2 /
Call completed.
Elapsed: 00:00:04.78
SQL> call appendLineItems(2001,3000)
2 /
Call completed.
Elapsed: 00:00:09.39
SQL> call appendLineItems(3001,4000)
2 /
Call completed.
Elapsed: 00:00:13.93
SQL> call appendLineItems(4001,5000)
2 /
Call completed.
Elapsed: 00:00:18.70
SQL> call appendLineItems(5001,6000)
2 /
Call completed.
Elapsed: 00:00:23.65
SQL> call appendLineItems(6001,7000)
2 /
Call completed.
Elapsed: 00:00:28.18
SQL> call appendLineItems(7001,8000)
2 /
Call completed.
Elapsed: 00:00:32.98
SQL> call appendLineItems(8001,9000)
2 /
Call completed.
Elapsed: 00:00:37.78
SQL> call appendLineItems(9001,10000)
2 /
Call completed.
Elapsed: 00:00:43.03
SQL> select * from user_segments where segment_type like '%INDEX%'
2 order by segment_type;
SEGMENT_NAME PARTITION_NAME SEGMENT_TYPE SEGMENT_SU TABLESPACE_NAME BYTES BLOCKS EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS MAX_EXTENTS MAX_SIZE RETENTI MINRETENTION PCT_INCREASE FREELISTS FREELIST_GROUPS BUFFER_
SYS_C004114 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004115 INDEX ASSM USERS 393216 48 6 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004116 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004117 INDEX ASSM USERS 196608 24 3 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004118 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004120 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004119 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00005$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00011$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00016$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00025$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060324C00003$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060305C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060328C00003$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
15 rows selected.
Elapsed: 00:00:00.17
SQL> select * from user_segments;
SEGMENT_NAME PARTITION_NAME SEGMENT_TYPE SEGMENT_SU TABLESPACE_NAME BYTES BLOCKS EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS MAX_EXTENTS MAX_SIZE RETENTI MINRETENTION PCT_INCREASE FREELISTS FREELIST_GROUPS BUFFER_
ACTION_TABLE NESTED TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060305C00004$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060305C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004114 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
LINEITEM_TABLE NESTED TABLE ASSM USERS 917504 112 14 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004115 INDEX ASSM USERS 393216 48 6 65536 1 2.147E+09 2.147E+09 DEFAULT
PURCHASEORDER_OR TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00004$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00004$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00005$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00005$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00011$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00011$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00016$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00016$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060304C00025$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060304C00025$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004116 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004117 INDEX ASSM USERS 196608 24 3 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004118 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
PURCHASEORDER_CLOB TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060324C00003$$ LOBSEGMENT ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_IL0000060324C00003$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004119 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
PURCHASEORDER_CSX TABLE ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_LOB0000060328C00003$$ LOBSEGMENT SECUREFILE USERS 131072 16 1 106496 1 2.147E+09 2.147E+09 DEFAULT 0 DEFAULT
SYS_IL0000060328C00003$$ LOBINDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
SYS_C004120 INDEX ASSM USERS 65536 8 1 65536 1 2.147E+09 2.147E+09 DEFAULT
28 rows selected.
Elapsed: 00:00:00.17
SQL> select index_name, table_name, blevel, LEAF_BLOCKS, DISTINCT_KEYS, AVG_LEAF_BLOCKS_PER_KEY, AVG_DATA_BLOCKS_PER_KEY
2 from user_indexes
3 ;
INDEX_NAME TABLE_NAME BLEVEL LEAF_BLOCKS DISTINCT_KEYS AVG_LEAF_BLOCKS_PER_KEY AVG_DATA_BLOCKS_PER_KEY
SYS_C004114 ACTION_TABLE 0 1 1 1 1
SYS_IL0000060305C00004$$ ACTION_TABLE
SYS_C004115 LINEITEM_TABLE 1 2 511 1 1
SYS_C004119 PURCHASEORDER_CLOB 0 1 1 1 1
SYS_IL0000060324C00003$$ PURCHASEORDER_CLOB
SYS_C004120 PURCHASEORDER_CSX 0 1 1 1 1
SYS_IL0000060328C00003$$ PURCHASEORDER_CSX
SYS_C004116 PURCHASEORDER_OR 0 1 1 1 1
SYS_IL0000060304C00025$$ PURCHASEORDER_OR
SYS_IL0000060304C00016$$ PURCHASEORDER_OR
SYS_IL0000060304C00011$$ PURCHASEORDER_OR
SYS_IL0000060304C00005$$ PURCHASEORDER_OR
SYS_IL0000060304C00004$$ PURCHASEORDER_OR
SYS_C004117 PURCHASEORDER_OR 0 1 1 1 1
SYS_C004118 PURCHASEORDER_OR 0 1 1 1 1
15 rows selected.
Elapsed: 00:00:00.15
SQL> select dbms_lob.getlength(t.object_value.getclobval())
2 as "XMLDocSize"
3 from PURCHASEORDER_OR t;
XMLDocSize
1505177
1 row selected.
Elapsed: 00:00:00.42
SQL> set autotrace ON EXPLAIN
SQL> select count(*) from PURCHASEORDER, XMLTABLE (
2 '/PurchaseOrder/LineItems/LineItem' passing OBJECT_VALUE)
3 /
COUNT(*)
9010
1 row selected.
Elapsed: 00:00:00.07
Execution Plan
Plan hash value: 3089669143
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 53 | 9 (12)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 53 | | |
|* 2 | HASH JOIN | | 511 | 27083 | 9 (12)| 00:00:01 |
| 3 | TABLE ACCESS FULL| PURCHASEORDER_OR | 1 | 34 | 3 (0)| 00:00:01 |
|* 4 | TABLE ACCESS FULL| LINEITEM_TABLE | 511 | 9709 | 5 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("NESTED_TABLE_ID"="PURCHASEORDER"."SYS_NC0003200033$")
4 - filter("SYS_NC_TYPEID$" IS NOT NULL)
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