Estimate size of an planned table

Hi,
I need to estimate size of a table wich has to be created.
I know the Oracle DATA BLOCK SIZE,
the columns
and the number of rows..
As I said, the table does not exist in Oracle yet, thats why I can not do following select:
select bytes/1024/1024 MB from dba_segments where owner = <USER>
and segment_type = 'TABLE'
and segment_name = <TABLE_NAME>
I know there is a feature in EM where you can estimate the size of a table...
Thanks

Then upgrade your database.
Or use the search feature against the forum (done for you), there is a plenty example how calculate the table size.
Nicolas.

Similar Messages

Question on Plan Table

Hi,
This is the Explain Plan for one of my SQL queries
PLAN_TABLE_OUTPUT
| Id | Operation            | Name       | Rows | Bytes | Cost | Inst   |IN-
OUT|
|   0 | SELECT STATEMENT     |             |   101 | 7676 |    60 |        |
PLAN_TABLE_OUTPUT
   |
|   1 | SORT ORDER BY       |             |   101 | 7676 |    60 |        |
   |
|   2 |   NESTED LOOPS OUTER |             |   101 | 7676 |    50 |        |
   |
|   3 |    VIEW              |             |   100 | 2400 |     5 |        |
   |
PLAN_TABLE_OUTPUT
|   4 |     UNION-ALL        |             |       |       |       |        |
   |
|   5 |      REMOTE          |             |       |       |       | MKTG   | R-
S ||   6 |      REMOTE          |             |       |       |       | MKTG   | R-
S ||   7 |    REMOTE            |             |     1 |    52 |     1 | MKTG   | R-
S |PLAN_TABLE_OUTPUT
Note: cpu costing is off, PLAN_TABLE' is old versionI am concerned about the note "cpu costing is off"
Does this mean my optimizer is RBO?
Moreover, what is the cost cloumn in the explain plan table meant by?
BANNER
Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
PL/SQL Release 9.2.0.6.0 - Production
CORE 9.2.0.6.0 Production
TNS for HPUX: Version 9.2.0.6.0 - Production
NLSRTL Version 9.2.0.6.0 - Production
I did 'select cpu_cost' from v$sql_plan;'
The column results in NULL values.
Thanks
Rajiv

Hi Justin,
I ran into some serious problem here.
As per the suggestions given, this is the modified query
SELECT   x.rep_date,
               x.certificate_id,
               x.member_kit_flag,
               y.enabled_date,
               y.disabled_date,
               TRUNC(y.creation_date) - TRUNC(x.rep_date) days,
               y.csg_account_no
          FROM (SELECT /*+ DRIVING_SITE(pt_gift_cert_referrals) */ a.*,
                       /*+ DRIVING_SITE(pt_cd_mailings) */ b.member_kit_flag,
                       to_date(b.shipment_date,'dd MON YYYY') rep_date
                  FROM pt_gift_cert_referrals@mktg a,
                       pt_cd_mailings@mktg b
                 WHERE a.cert_mailing_id = b.cert_mailing_id
                   AND to_date(b.shipment_date,'dd MON YYYY') >= '22-AUG-2003'
                UNION ALL
                SELECT /*+ DRIVING_SITE(pt_gift_cert_referrals) */ a.*, /*+ DRIVING_SITE(pt_certificate_referrals) */
                       'Z' member_kit_flag,/*+ DRIVING_SITE(pt_cert_stage_log) */
                       to_date(b.creation_date,'dd MON YYYY') rep_date
                  FROM pt_gift_cert_referrals@mktg a,
                       pt_cert_stage_log@mktg b
                 WHERE a.cert_event_id = b.cert_event_id
                   AND SUBSTR(b.process_type, 1, 14) = 'CLUBDISH DAILY'
                   AND to_date(b.creation_date,'dd MON YYYY') >= '22-AUG-2003') x,
               pt_certificate_referrals@mktg y
         WHERE x.certificate_id = y.certificate_id(+)
      ORDER BY rep_date,
               x.certificate_id;Unfortunately, the query resulted in NO rows.
no rows selected
Elapsed: 00:02:31.03
Execution Plan
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=60 Card=101 Bytes=76
          76)
   1    0   SORT (ORDER BY) (Cost=60 Card=101 Bytes=7676)
   2    1     NESTED LOOPS (OUTER) (Cost=50 Card=101 Bytes=7676)
   3    2       VIEW (Cost=5 Card=100 Bytes=2400)
   4    3         UNION-ALL
   5    4           REMOTE*                                            MKTG.WOR
                                                                       LD
   6    4           REMOTE*                                            MKTG.WOR
                                                                       LD
   7    2       REMOTE* (Cost=1 Card=1 Bytes=52)                       MKTG.WOR
                                                                       LD
   5 SERIAL_FROM_REMOTE            SELECT /*+ */ "A2"."CERTIFICATE_ID","A2"."GI
                                   FT_CSG_ACCOUNT_NO","A2"."CERT_PROMOT
   6 SERIAL_FROM_REMOTE            SELECT /*+ */ "A2"."CERTIFICATE_ID","A2"."GI
                                   FT_CSG_ACCOUNT_NO","A2"."CERT_PROMOT
   7 SERIAL_FROM_REMOTE            SELECT "CERTIFICATE_ID","CSG_ACCOUNT_NO","EN
                                   ABLED_DATE","DISABLED_DATE","CREATIO
Statistics
          0 recursive calls
          0 db block gets
          0 consistent gets
          0 physical reads
          0 redo size
        338 bytes sent via SQL*Net to client
        234 bytes received via SQL*Net from client
          1 SQL*Net roundtrips to/from client
          1 sorts (memory)
          0 sorts (disk)
          0 rows processedThe thing more bothering is, optimizer is not using the DRIVING_SITE hint
Previous Execution Plan was....
6742176 rows selected.
Elapsed: 03:15:20.07
Execution Plan
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=53 Card=100 Bytes=76
          00)
   1    0   SORT (ORDER BY) (Cost=53 Card=100 Bytes=7600)
   2    1     NESTED LOOPS (OUTER) (Cost=50 Card=100 Bytes=7600)
   3    2       VIEW (Cost=5 Card=100 Bytes=2400)
   4    3         UNION-ALL
   5    4           REMOTE*                                            MKTG.WOR
                                                                       LD
   6    4           REMOTE*                                            MKTG.WOR
                                                                       LD
   7    2       REMOTE* (Cost=1 Card=1 Bytes=52)                       MKTG.WOR
                                                                       LD
   5 SERIAL_FROM_REMOTE            SELECT "A2"."CERTIFICATE_ID","A2"."GIFT_CSG_
                                   ACCOUNT_NO","A2"."CERT_PROMOTION_ID"
   6 SERIAL_FROM_REMOTE            SELECT "A2"."CERTIFICATE_ID","A2"."GIFT_CSG_
                                   ACCOUNT_NO","A2"."CERT_PROMOTION_ID"
   7 SERIAL_FROM_REMOTE            SELECT "CERTIFICATE_ID","CSG_ACCOUNT_NO","EN
                                   ABLED_DATE","DISABLED_DATE","CREATIO
Statistics
          0 recursive calls
         14 db block gets
          0 consistent gets
      14173 physical reads
          0 redo size
112195379 bytes sent via SQL*Net to client
    3146621 bytes received via SQL*Net from client
     449480 SQL*Net roundtrips to/from client
          0 sorts (memory)
          1 sorts (disk)
    6742176 rows processedAny help on this would be greatly appreciated.
Thanks
Rajiv

Interpret sample schema of sample plan table

Hi guru,
May I know if my following understanding and interpretation on the sample plan table (sampling type is sampling schema) is correct:
Lot Size ---Sample Sze---c1--------d1--------c2 ------ d2------c3-------d3------c4------d4 --------c5---------d5----------c6-----------d6----------c7------------d7
10000----------20--------0----------4--------0---------4-------0---------4------0--------4----------0---------4-----------0------------4------------0-------------0
If lot size is equal or above 10000, the sample size computed by the system will be 20.
The first sample has an acceptance of zero (C1) and rejection of 4 (d1). In another word, if there is 4 or above 4 sample size is fail, it will be rejected. Correct?
Question 1 - what does the zero in C1 means? actually what is the usage of C1, C2, CN means, someone told me it is optional?
Next, if on the first sample, the 4 out of 20 of the sample size are failed, the inspection lot is failed.
Therefore, the system will triggers 2nd sample (i.e. C2, and D2) in which it is similar to C1 and D1 (i.e. 0 for acceptance, 4 for rejection), and if it fail again, the system will trigger the subsequent sample (i.e. C3, and D3) till C7 and D7, correct?
Question 2 - what will the system response if the sample lot kept failing until C6 and D6? Because the last sample (i.e. C7, and D7 are both 0), what will the system do on this?
Thanks
YY

Hi Gajesh,
Thanks so much on your reply, but on the answer 4 which you replied to me, I still have a bit double..
4) Question 2: what if I have 5 sample size, and the actual test result is 2 sample size are pass (which meet C1 value), and 3 sample size are fail (which is smaller than D1 value), I said the whole MIC is pass.. am I correct?
*You said: No, system will propose you to check next sample to check C2 /D2*
Why system propose the next C2/D2? My rational is based on the following statement which you previously confirmed that I am correct:
IF the actual number sample size inspection fall outside the lower & upper limit range (i.e. fail) is Equal to OR Larger than D1, THEN, the whole MIC is rejected.
Thus, my rational is if the above statement is correct, which mean if the failed number of sample size (i.e. 3) is less than d1 (i.e. 4), isn't it clearly pass? Furthermore, out of the 5 sample size, 2 sample sizes are passed (i.e. which is equal to the C1 of 2). Thus, why would the system still propose to check next which is C2/D2? Beside on the very first time, you had replied to me on this topic you saidu2026.
Suppose you have a lot size of 10 having sampling size 5 with C1(acceptance number) 0 and D1(rejection number) 3
You have quantitative MIC with single recording with a specification limit of 10 (lower) to 20 (upper)
If, in actual results, if the 3 of the results is outside the spec limits, the MIC as whole is rejected. If only 2 results are rejected the MIC stands accepted.
The following is the sample plan we talking about...
Lot Size -Sample Size-c1--d1c2---d2--c3---d3--c4--d4 -c5d5c6d6c7--
d7
10--52404---04--0404040--
0
Thanks,
Yong-Yeow

Estimate size of export with datapump

Hi,
When i run an expdp with estimate_only=TRUE, the estimate give me 383M.
When i run expdp the sum of the files generated are not equal to 383M but 143.64M.
Why.
Regards

Fahd Mirza wrote:
Hi,
Estimate size of expdp is calculated using statistics for each table. That's wrong, well, at least by default estimate is working based on BLOCKS, not on STATISTICS.
Find out more Understanding the ESTIMATE and ESTIMATE_ONLY Parameters in Export DataPump ID 786165.1+
And using blocks method may give less accurate on estimation size when tables have been created with large extents, or mass delete...
Nicolas.

How to find accurate number of Rows, and size of all the tables of a Schema

HI,
How to find the accurate number of Rows, and size of all the tables of a Schema ????
Thanks.

SELECT t.table_name AS "Table Name",
t.num_rows AS "Rows",
t.avg_row_len AS "Avg Row Len",
Trunc((t.blocks * p.value)/1024) AS "Size KB",
t.last_analyzed AS "Last Analyzed"
FROM dba_tables t,
v$parameter p
WHERE t.owner = Decode(Upper('&1'), 'ALL', t.owner, Upper('&1'))
AND p.name = 'db_block_size'
ORDER by 4 desc nulls last;
## Gather schema stats
begin
dbms_stats.gather_schema_stats(ownname=>'SYSLOG');
end;
## Gather a particular table stats of a schema
begin
DBMS_STATS.gather_table_stats(ownname=>'syslog',tabname=>'logs');
end;
http://www.oradev.com/create_statistics.jsp
Hope this will work.
Regards
Asif Kabir
-- Mark the answer as correct/helpful

Operations are not getting despatched in capacity planning table

Hi Experts,
I am using capacity planning table (Graphical) to level the capacities and sequence the process orders. The start date of my orders are very well in future and sufficient capacities also is available in resources. But when I go to CM25 and select one order and click on despatch, system is not despatching it. This is the case for almost all the overall profiles.
The surprising factor is, this function was working fine earlier without any issues. I havent done any changes in configs which will affect capacity planning.
What can be the reason for this? Any thoughts please?.
One more thing. Is there any option to avoid the capacity planning step if Iam using R/3 and manage it by some other way?
Appreciate your earlier reply
Thanks & Regards
Prathib

Most likely you didnt define the rowsource key properly. Please look under <install>/errors folder for any file there.
Also, please read the documentation. There is information there about how to troubleshoot a loading problem. Please always read the documentation and we would appreciate feedback on the documentation.
http://download.oracle.com/docs/cd/E17236_01/epm.1112/iop_user_guide/frameset.htm?launch.html

Edit next extent size of the Cluster table

Hi Guys
I need to change the next extent size of the a table.
I ran se14 but i am not able to get into edit mode, because there is no button for edit mode.
Reason: Cluster table
Two questions:
1. Why there is no Edit button? Is it because this table doesnot exixt at DB level.
2. How can i change the next extent size for a Cluster table from sql prompt or from brtools if possible.
Information:
I am facing this issue only in DEV, QAS boxes, where as in Production its fine.
Regards
Ricky
Edited by: Ricky kayshap on Dec 9, 2008 3:52 PM

Hi,
Cluster Tables doesn't exist in DB, Because of that you can't make changes to extents at DB level.
if you experiencing some space issue. I woud suggest to check the underline Transparent tables and make changes to those.
hope this helps.
Kalyan.

Error message in capacity planning table

Hi,
I am using REM planning table.I enter the planning table by giving the selection criteria of Plant and production line.
System is giving following error message,
the error message and dignosis of the error message is given here.
'No prod. dates for material MTI_FERT011, version 0001, production line 2279'
Message no. REMPT315
Diagnosis
The planned order has no production dates for the combination of material, production version and production line you specified.
This may be as a result of the following, for example:
The planned order was scheduled but not using the production line you selected. (The production line is determined by the production version you entered in a planned order.)
Procedure
One possibility of finding out what is causing the problem is:
To access the planned order from the detailed dialog box in the table via "Change" and reschedule the planned order. Check the scheduling log by choosing "Goto --> Scheduling log". More information is displayed in the log's warning or error messages.
But which master data to be corrected is not known.
Experts please guide me.
Regards,
Ravindra

Hello,
I had the same error while working with the REM planning table, despite the consistency of the data.
Another cause that can lead to the error message REMPT315 is that in the production version detailed screen, "Planning data" table you have entered the routing next to rate-based planning. You must enter the routing (number of the group and the group counter) on the line detailed planning.
After that, choose check again and try to introduce new quantities in the planning table. It worked for me!
Irina

Unable to drop or truncate a plan table

Hi guys,
I was trying to execute 'Explain Plan' on one of my query. However, when I tried to drop the plan table, i was prompted that the table or view does not exists:
QL> EXPLAIN PLAN FOR
2 SELECT * FROM ORDERS WHERE TO_CHAR(O_SHIP_DATE, 'YYYY')='2005' AND O_STATUS='PROCESSING';
Explained.
SQL> SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);
PLAN_TABLE_OUTPUT
Plan hash value: 1275100350
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 648 | 46008 | 725 (5)| 00:00:09 |
|* 1 | TABLE ACCESS FULL| ORDERS | 648 | 46008 | 725 (5)| 00:00:09 |
Predicate Information (identified by operation id):
PLAN_TABLE_OUTPUT
1 - filter("O_STATUS"='PROCESSING' AND
TO_CHAR(INTERNAL_FUNCTION("O_SHIP_DATE"),'YYYY')='2005')
14 rows selected.
SQL> TRUNCATE TABLE PLAN_TABLE;
TRUNCATE TABLE PLAN_TABLE
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> select count(*) from plan_table;
COUNT(*)
6
Any idea what went wrong? Thanks in advance.

Ok, I managed to find the scripts to recreate the plan table. Now it works again. Cheers.

The size of the target table grows abnormaly

hi all,
I am curently using OWB (version 9 2.0 4 to feed some tables.
we have created a new database 9.2.0.5 for a new datawarehouse.
I have an issue that I really can not explain about the increase size of the target tables.
I take the exemple of a parameter table that contains 4 fields and only 12 rows.
CREATE TABLE SSD_DIM_ACT_INS
ID_ACT_INS INTEGER,
COD_ACT_INS VARCHAR2(10 BYTE),
LIB_ACT_INS VARCHAR2(80 BYTE),
CT_ACT_INS VARCHAR2(10 BYTE)
TABLESPACE IOW_OIN_DAT
PCTUSED 0
PCTFREE 10
INITRANS 1
MAXTRANS 255
STORAGE (
INITIAL 1M
MINEXTENTS 1
MAXEXTENTS 2147483645
PCTINCREASE 0
BUFFER_POOL DEFAULT
LOGGING
NOCACHE
NOPARALLEL;
this table is feed by a mapping and I use the update/insert option, which generates a Merge.
first the table is empty, I run the maping and I add 14 lines.
the size of the table is now 5 Mo !!
then I delete 2 lines by sql with TOAD
I run a again the mapping. It updates 12 lines and add 2 lines.
at this point,the size of the table has increased of 2 Mo (1 Mo by line !!)
the size of the table is now 7 Mo !!
I do the same again and I get a 9 Mo table
when I delete 2 lines with a SQL statement and create them manually, the size of the table does not change.
when I create a copy of the table with an insert select sql statement the size becomes equal to 1 Mo which is normal.
Could someone explain me how this can be possible.
is it a problem with the database ? with the configuration of OWB ?
what should I check ?
Thank you for your help.

Hi all
We have found the reason of the increasing.
Each mapping has a HINT which is defaulted to PARALLEL APPEND. as I understand it, it is use by OWB to determine if an insert allocates of not new space for a table when it runs and insert.
We have changed each one to PARALLEL NOAPPEND and now, it's correct.

How to calcalate the maximum size occupied by a table/row

Hi,
I am using the below query to find the maximum size occupied by a table per a row of data.
SQL> desc t2
Name Null? Type
NO NUMBER(1)
CH VARCHAR2(10)
SQL> select sum(data_length) from user_tab_columns where table_name='T2';
SUM(DATA_LENGTH)
32
Is this correct? Does oracle takes 22 bytes of space to store a column of Number(1) per a row as it shows below !?
1* select data_length from user_tab_columns where table_name='T2'
SQL> /
DATA_LENGTH
22
10
Please give your comments/suggestions
Thanks and Regards
Srikanth

If you are trying to do this for an existing table, you can get the actual number of bytes stored per column by:
SELECT VSIZE(column_name)
FROM tableSo, to get the largest row you could:
SELECT MAX(VSIZE(col1) + VSIZE(col2) ... + VSIZE(coln))
FROM tableIf you want to get the theoretical largest possible row size, then you can use something like:
SELECT SUM(DECODE(data_type,'NUMBER', ROUND((data_precision/2)+.1,0) +1,
                            'DATE',   7,
                            'LONG',   2147483648,
                            'BLOB',   4000,
                            'CLOB',   4000,
                            data_length)) max_length
FROM user_tab_columns
WHERE table_name = 'MY_TABLE'This works because:
For a number, Oracle stores two digits in each byte, and uses one byte for the mantissa. Note, if you are expecting negative numbers in your numeric columns then add one additional byte).
For a date, Oracle always requires 7 bytes.
A long is at most 2 GB in size.
Both Blobs and Clobs will be stored out-of-line when they are larger than about 4,000 bytes.
For other data types you specify bytes of storage when you define the column, and that is stored in data_length.
I'm not sure at this point what sort of sizes you would get for object type columns or nested tables.
HTH
John

Limit on the memory/size of the internal table

Hi,
Is there any limit on the size of internal table....?
we are having some select statements that are fetching huge no. of records into the internal tables...
can some of the records be missed or is there any limit on the no. of records or size of the internal table...
The code that we are using is logically correct and it is working fine for small inputs but for the large selections, some of the records are getting missed as we are displaying the data from these internal tables only...
We can not debug the code coz for the large inputs, code is taking around 2 to 3 hours of processing
We are using this code in BI in the end routines
We are doing the operation like
itab1 = itab2
where itab2 contains around 25000 records and itab1 is initial(no entries)
If there is a limit , then how can we increase the size
Please suggest..
Thanks
Tarun Brijwani
Edited by: Tarun Brijwani on Apr 23, 2009 6:06 PM
Edited by: Tarun Brijwani on Apr 23, 2009 6:06 PM

Hello Tarun
You can limit the number of records selected by your SELECT statement by adding the addition "UP TO n ROWS" to your SELECT statement.
Example:
SELECT * FROM TABLEXYZ UP TO 5000 ROWS WHERE .........
Hope this helps you.
Thanks and best regards
Anand.

Size of the internal table

Hi Experts,
I would like to ask about the size limit of internal table?
How many records can I fetch into an internal table?
iam not getting the correct answer,plz any one can tell me pin point answer.
Thanks,

hi ,
there is no limit for records to the internal table ,its depends on your server memory available.
internal table is a temporary memory ,so its totally dependent on the memory.
thanks
siddharth

Plan table output

Hello guys,
I am on a 9.2.0.7.0, and i am trying to get explain plan for one select that is reading some table through the db link at the remote sight.
Unfortunately, i am getting this output :
1* select * from table(dbms_xplan.display)
PLAN_TABLE_OUTPUT
| Id | Operation            | Name       | Rows | Bytes | Cost | Inst   |IN-OUT|
|   0 | SELECT STATEMENT     |             |       |       |       |        |      |
|   1 | REMOTE              |             |       |       |       | TESTI1 | R->S |
Note: rule based optimization
9 rows selected.remote database is 10.2.0.4.0
Can you reccomend me something?
Why can't i see normal output from the plan table, what to do to see it ?
Also , i could'nt find anywhere in the docs the meaning for R->S...
thanks

thanks for your time to reply
@Kartrick
-so can we say that the only way to see that plan would be to connect to that remote instance with that db link user and run it there?
@ravikumar
-this woried me to... so optimizer mode on that remote 10.2.0.4.0 is choose, so can we say that this query is attacking remote table with RBO plan ?

Explain Plan Table

Hi,
I have created the plan_table using utlxplan.sql but still i am getting the error:
ORA-02404: specified plan table not found
Is there something else to be done to get it fixed?
please suggest.
Regards
Arpit

As Lukasz suggested check the table privs between the schema where the table was created and the user trying to use it. Also make sure there's a synonym for the user using explain plan to get to the plan table easily; a public synonym might work best

Estimate size of an planned table

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