Fragmentation in tables and indexes
Can exist fragmentation in tables & indexes with ASM?
mexman,
ASM is a disk managment system that has no relationship to the concept of table/index fragmentation.
You probably mean ASSM.
ASSM affects some of the details of how object space is managed but table/index internal fragmentation could still exist though this is usually not an issue with or without ASSM depending on the DML pattern.
Research the archives on this topic as suggested if you want to know about detecting internal object fragmentation.
HTH -- Mark D Powell --
Similar Messages
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Fragmentation in tables and indexes with 9.2.0.5
Hi guys ,
I need of query to identified fragmentation in tables and indexes using Oracle 9i,someone could help me send that's querys
tks
spaulonciFragmentation by itself at the tablespace level doesn't mean any thing from the performance point of view, only from the storage capacity perspective, and this just in case fragments are not necessarily the same size as in the case of dictionary manged tablespaces.
You may be concerned about block density, which actually could lead to performance degradation. I suggest you to consider using coalesce instead of rebuilding in the case of indexes, and in the case of tables you should perform a segment reorganization. In the case of 9iR2 the coalesce command for table segments is not available so you will have to perform another segment reorganization strategy. If there are meaningful differences with the high water mark, average number of rows per block and chained rows then you will notice performance differences.
I suggest you to take metrics for block usage prior to perform an index coalesce operation, as well as prior to perform a data segment reorganization to assess if the reorganization effort is useful.
~ Madrid
http://hrivera99.blogspot.com/ -
DB02 view is empty on Table and Index analyses DB2 9.7 after system copy
Dear All,
I did the Quality refresh by System copy export/import method. ECC6 on HP-UX DB29.7.
After Import Runstats status n Db02 for Table and Index analysis was empty and all value showing '-1'. Eventhough
a) all standard backgrnd job scheduled in sm36
b) Automatic runstats are enabled in db2 parameters
c) Reorgchk all scheduled periodically from db13 and already ran twice.
4) 'reorgchk update statistics on table all' was also ran on db2 level.
but Run stats staus in db02 was not getting updated. Its empty.
Please suggest.
Regards
VinayHi Deepak,
Yes, that is possible (but only offline backup). But for the new features like reclaimable tablespace (to lower the high watermark)
it's better to export/import with systemcopy.
Also with systemcopy you can use index compression.
After backup and restore you can have also reclaimable tablespace, but you have to create new tablespaces
and then work with db6conv and online table move to move one tablespace online to the new one.
Best regards,
Joachim -
How to find Fragmentation of tables and tablespaces in oracle 8i
Hi,
How can i measure the fragmentation of Tables and Tablespaces in oracle 8i.
Do any one have any handy script to find the same.
What are the attributes to be determined to do health checkup of a database.how many such empty blocks are there in the table and of what size.Again Tom Kyte reference :
http://asktom.oracle.com/pls/ask/f?p=4950:8:7760471022221195640::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:231414051079
For tablespace, fragmentation is the regular termAbout tablespace, the link from post above can help.
Nicolas. -
Report to find all table and index sizes
Hi all,
Good day..
Is there any report.sql or so to find out the sizes of all the tables and indexes in a database.
thanks,
baskar.l1.To get table size
What will be the table size if?
<or>
break on report
set line 200
COMPUTE SUM LABEL "Total Reclaimable Space" OF "KB Free Space" ON REPORT
column "Table Size" Format a20
column "Actual Data Size" Format a20
column "KB Free Space" Format "9,99,999.99"
select table_name,
round((blocks*8),2)||'kb' "Table size",
round((num_rows*avg_row_len/1024),2)||'kb' "Actual Data size",
pct_free,
round((blocks*8),2) - (round((blocks*8),2)*pct_free/100) - (round((num_rows*avg_row_len/1024),2)) "KB Free Space"
from user_tables
where round((blocks*8),2) - (round((blocks*8),2)*pct_free/100) - (round((num_rows*avg_row_len/1024),2)) > 0
order by round((blocks*8),2) - (round((blocks*8),2)*pct_free/100) - (round((num_rows*avg_row_len/1024),2)) desc
2.To get index size
How to size the Index
Hth
Girish Sharma -
Missing Tables and Indexes greyed out in DBACOCKPIT
Hi All,
I use Solution Manager 7.01 with MS SQL Server 2008 DB.
I want to monitor with DBACOCKPIT a MS SQL Server 2005 DataBase of a SAP BPC 5.1.
I connected the DB but in DBACOCKPIT some functionality are greyed out.
I want to use in Diagnostics section the "MISSING TABLES AND INDEXES" function but this command is greyed out.
Is it possible to use this function?
Please, help me!
Regards,
AlessandroHi,
Gray color means that screen is disabled for any reason (authorization, SQL Server release, monitoring remote, etc).
I believe, those items cannot be monitored unless these limitations are sorted out.
Please refer to the Document "The SAP DBA Cockpit for Microsoft SQL Server" in SDN.
You can get the status about the restriction in the bottom of dbacockpit screen.
Thanks,
Jagan
Edited by: jagadheeshan govindasamy on Sep 16, 2009 1:03 PM -
Missing Tables and Indexes in 3.5
Hi,
when i am executing Tcode DB02 then under Missing Tables and Indexes i find 35 Indexes as not created.
can anybody tell me what does that signify. is this a issue if so how to fix it.
Indexes not created
ADCP-I04
ADCP-I03
ADCP-I02
ADCP-I01
ADCPS-I01
ADCPS-I02
ADCPS-I03
ADCPS-I04
ADRC-I14
ADRC-I11
ADRC-I05
ADRC-I02
ADRC-G
ADRP-I01
ADRP-I02
ADRP-I03
ADRP-I04
ADRP-I07
ADRP-I08
ADRP-I09
ADRV-I01
BUT000-PER
CDHDR-001
CDHDR-002
CRMD_ORDERADM_I-PKI
CRMD_ORDERADM_I-DES
ISSUE_RELATION-001
NAST-ADQ
RMPS_T_RESUB-RAG
RMPS_T_RESUB-RCU
SSPICSPRHD-S02
SSPICSTRHEAD-S01
SSPICSTRPL-FLD
STXH-TDN
SWBRULECOM-RSY
RakeshHi Rakesh,
First thing this is not an issue but an information that says that these indexes are not be created in the System.
This option Indexes not created is an SAP table maintained from Dev to Prod just to indicate that these indexes cannot be created.
That's the reason why u have a green mark beside them and this will make clear for you that this is not an issue.
Hope it helps!!!!
Thanks & Regards,
Neelesh Jain. -
Hi SAP Gurus,
on our SAP NetWeaver 7.x BW (based on AIX/Oracle) I find via transaction DB02 (path = Diagnostics => Missing Tables and Indexes) under "Unknown objects in ABAP Dictionary" under DB views a BW object /BI0/.....
When I make a double click on the object, I am getting the popup window "Display not possible for this object":
How can I identify the object and clarify with the BW application expert, if needed, how to resolve this object?
I searched already via RSA1 for the object, but I wasn't able to find anything so far ...
Thanks for your help and ideas.
Best regards
CarlosHello Carlos
The database view in question is a temporary database object created during a query execution.
Please read this SAP note 449891 - Temporary database objects in BW 3.x to understand what that view is all about and impact if those views are removed.
The SAP notes 449891 and 1139396 suggests to run the report SAP_DROP_TMPTABLES to drop these temporary objects. Whether the objects are still required or not is a question to be put across to the BW team. If the temporary objects are removed when they are used by a query, then the query will fail.
Have a nice day
RB -
Import dumpfile with seperate tablespaces for table and index
Hi,
We have a schema for which the its tables are stored in seperate tablespace and indexes are stored in different tablespace. Now we have take full schema export. Now we want to import it on another schema. Now I want to know if the we have difference in the tablespace name we use REMAP_TABLESPACE clause of the impdp command but what about the seperate tablespace for table and indexes. How would Oracle handle this.
Regards,
AbbasiHi,
I hope you created the same tablespace structure on the target side if not so remap_tablespace option you have to use for specifying different tablespaces.Oracle will take care of putting data and index.Any how if a index is moved from one tablespace to other you have to rebuild them,once you rebuild them than only stattistics are gathered otherwise you
might face some performance issue.
Better option is to keep same tablespace structures in source and target environment.
Best regards,
Rafi.
http://rafioracledba.blogspot.com
Edited by: Rafi (Oracle DBA) on May 9, 2011 7:07 AM -
BW DB13 Tables and indexes missing
hi, everyone,
our team find a strangethings in DB02 about the growth of table space, there is even no any growth, and it keeps about two months. and then we found that in tables and indexes all table about BW like *ODSD, *FACTD, *DIMD are missing!
I only find DB13C appear the error as" REOGR CHK for All Tables" at the same time .
please tell me why I can't find BW tables ? is there any relations between tables missing and job calendar?
our level is 701, and database is DB6.It's a fool questions, i found the reason is so easy^^
-
Hi SAP Gurus,
I noticed on our SAP business warehouse (BW) system (NetWeaver 7.0 based on AIX/Oracle 11g) in transaction DB02 => Diagnostics => Missing Tables and Indexes under Secondary indexes, 26 indexes, in package $tmp:
The indexes are defined, but they don't have been created on the database.
When I try to create them via the database tool, I am getting the warning:
Does the warning raise up, because they where defined in the $tmp package?
I was looking in SAP notes for a solution for this "warning" concerning the /BIC/F-Indexes but I didn't found yet anything helpful ...
Thanks for your help and ideas ...
Best regards
CarlosHi Carlos,
These are secondary indexes created during process chains in BI to improvise performance.
You may refer below SCN blogs on creation of these indices in BI.
Secondary Index - Improving DSO insert/read performance
How to Create Secondary Index on DSO in SAP BW
Hope this helps.
Regards,
Deepak Kori -
Hi all,
we have checked "missing table and indexs" status with DBACOCKPIT and there it show 362 Indexes are not created.
all are the standard table indexes.
we have updated the indexes and statistics with BRCONNECT also.and its complited successfully.after this also "it show 362 Indexes are not created". we are using SOLARIS OS and oracle database.
Can anybody help me out how to rebuilt the missing indexes .....plz mention the steps.
Thanks,
Rableen khuranaHi,
Refer to the note and lins on how to fix it
Note 1320008 - DBA Cockpit: Selection in "Missing Tables and Indexes"
http://wiki.sdn.sap.com/wiki/display/TechTSG/(DB)IndexReportedasMissing
http://help.sap.com/saphelp_nwpi711/helpdata/en/33/5b277b8b0745b8b60e67ca04c77ebb/content.htm
Thanks,
Arjun -
Reorganization of tablespaces, tables and indexes.
Hello Experts,
What is the concept of tablespaces, statistics , tables and indexes in SAP/Oracle ? Where are they used and what are they meant for ?
Wt is the concept and procedure of performing Reorganization of tablespaces, tables and indexes ? why do we need it for ?
Requested to revertb at earliest as its urgent . points guaranteed .
Regards,
SomyaHello Somya,
Probably difficult to explain entire information in this thread. But you definately get good information in the following link
http://help.sap.com/saphelp_47x200/helpdata/en/0d/d2fafd4a0c11d182b80000e829fbfe/frameset.htm
Please drill down through menus, and you will be able to get good information.
Also you can check the following SAP notes
666061 FAQ: Database objects, segments and extents
912620 FAQ: Oracle indexes
588668 FAQ: Database statistics
592393 FAQ: Oracle
541538 FAQ: Reorganizations
Regards,
Madhukar -
How to Gather Statistics of Tables and Indexes
Hi all,
Plz help me in Gathering Statistics of Tables and Indexes.
Thanksfor tables
exec dbms_stats.gather_table_stats('SCOTT', 'EMPLOYEES');
for indexes
exec dbms_stats.gather_index_stats('SCOTT', 'EMPLOYEES_PK');
check this link for detail
http://nimishgarg.blogspot.com/2010/04/oracle-dbmsstats-gather-statistics-of.html -
Cannot INSERT records into Partitioned Spatial Table and Index
I am trying to tune our Spatial Storage by creating partitioning our spatial_entity table and index. I used the World Geographic Reference System (GEOREF) creating a partition for each 15 x 15 degree grid square assigning a partition key of decimal longitude, decimal_latitude. The build went OK, however when trying to insert a data record I receive an ORA-14400: Inserted partition key does not map to any partition.
I validated the CREATE(s), and all appears correct, but obviously something is not correct, which is prompting for expert help in this forum.
I would be very grateful for your help.
Below are the code snippets for the table and index, and an insert statement.
CREATE TABLE spatial_entity
geoloc_type VARCHAR2 (60 BYTE) NOT NULL
,entity_id NUMBER NOT NULL
,metadata_xml_uuid VARCHAR2 (40 BYTE) NOT NULL
,geoloc MDSYS.sdo_geometry NOT NULL
,nee_method CHAR (1 BYTE) NOT NULL
,nee_status CHAR (1 BYTE) NOT NULL
,decimal_latitude NUMBER (15, 6) NOT NULL
,decimal_longitude NUMBER (15, 6) NOT NULL
PARTITION BY RANGE (decimal_longitude, decimal_latitude)
PARTITION p_lt_0_90s
VALUES LESS THAN (1, -90)
,PARTITION p_lt_0_75s
VALUES LESS THAN (1, -75)
,PARTITION p_lt_0_60s
VALUES LESS THAN (1, -60)
,PARTITION p_lt_0_45s
VALUES LESS THAN (1, -45)
,PARTITION p_lt_0_30s
VALUES LESS THAN (1, -30)
,PARTITION p_lt_0_15s
VALUES LESS THAN (1, -15)
,PARTITION p_lt_0_0
VALUES LESS THAN (1, 0)
,PARTITION p_lt_0_15n
VALUES LESS THAN (1, 15)
,PARTITION p_lt_0_30n
VALUES LESS THAN (1, 30)
,PARTITION p_lt_0_45n
VALUES LESS THAN (1, 45)
,PARTITION p_lt_0_60n
VALUES LESS THAN (1, 60)
,PARTITION p_lt_0_75n
VALUES LESS THAN (1, 75)
,PARTITION p_lt_0_90n
VALUES LESS THAN (1, maxvalue)
CREATE INDEX geo_spatial_ind ON spatial_entity (geoloc)
INDEXTYPE IS mdsys.spatial_index
PARAMETERS ('layer_gtype=MULTIPOINT TABLESPACE=GEO_SPATIAL_IND') LOCAL
(PARTITION p_lt_0_90s,
PARTITION p_lt_0_75s,
PARTITION p_lt_0_60s,
PARTITION p_lt_0_45s,
PARTITION p_lt_0_30s,
PARTITION p_lt_0_15s,
PARTITION p_lt_0_0,
PARTITION p_lt_0_15n,
PARTITION p_lt_0_30n,
PARTITION p_lt_0_45n,
PARTITION p_lt_0_60n,
PARTITION p_lt_0_75n,
PARTITION p_lt_0_90n,
INSERT INTO spatial_entity
geoloc_type
,entity_id
,metadata_xml_uuid
,geoloc
,nee_method
,nee_status
,decimal_latitude
,decimal_longitude
VALUES
'BATCH'
,0
,'6EC25B76-8482-4F95-E0440003BAD57EDF'
,"MDSYS"."SDO_GEOMETRY"
2001
,8307
,"MDSYS"."SDO_POINT_TYPE" (32.915286, 44.337902, NULL)
,NULL
,NULL
,'M'
,'U'
,32.915286
,44.337902
Thank you for you help.
DaveThank you for your quick reply. I did not post the entire CREATE script as it is quite long. The portion of the script that is applicable to the INSERT is:
,PARTITION p_lt_45e_90s
VALUES LESS THAN (23, -90)
,PARTITION p_lt_45e_75s
VALUES LESS THAN (23, -75)
,PARTITION p_lt_45e_60s
VALUES LESS THAN (23, -60)
,PARTITION p_lt_45e_45s
VALUES LESS THAN (23, -45)
,PARTITION p_lt_45e_30s
VALUES LESS THAN (23, -30)
,PARTITION p_lt_45e_15s
VALUES LESS THAN (23, -15)
,PARTITION p_lt_45e_0
VALUES LESS THAN (23, 0)
,PARTITION p_lt_45e_15n
VALUES LESS THAN (23, 15)
,PARTITION p_lt_45e_30n
VALUES LESS THAN (23, 30)
,PARTITION p_lt_45e_45n
VALUES LESS THAN (23, 45)
,PARTITION p_lt_45e_60n
VALUES LESS THAN (23, 60)
,PARTITION p_lt_45e_75n
VALUES LESS THAN (23, 75)
,PARTITION p_lt_45e_90n
VALUES LESS THAN (23, maxvalue)
Or, I do not fully understand. Are you indicating that I must explcitly state the longitude in each clause,
e.g ,PARTITION p_lt_45e_45n
VALUES LESS THAN (45, 45)
,PARTITION p_lt_45w_45n
VALUES LESS THAN (-45, 45)
If so, that answers the question of why it cannot find a partition, however an Oracle White Paper "Oracle Spatial Partitioning Best Practices" Sept 2004, discusses multi column partitioning such as represented by this problem, and gives an INSERT statement example of :
CREATE TABLE multi_partn_table (in_date DATE,
geom SDO_GEOMETRY, x_value NUMBER, y_value NUMBER)
PARTITION BY RANGE (X_VALUE,Y_VALUE)
PARTITION P_LT_90W_45S VALUES LESS THAN (1,-45),
PARTITION P_LT_90W_0 VALUES LESS THAN (1,0),
PARTITION P_LT_90W_45N VALUES LESS THAN (1,45),
PARTITION P_LT_90W_90N VALUES LESS THAN (1,MAXVALUE
and as I am writing this I am seeing that I failed to include the longitude and latitude in the SDO_GEOMETRY clause, so it does appear tht I need to explicitly state the longitude valuues.
What is your judgement sir?
Dave
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