Collect statistics for a Table
HelloI have a tabel 'XXX' need to collect statistics. Please tell me how can we collect and where it will store.
Regs,
Brij
Please run this to collect statistics.
exec DBMS_STATS.GATHER_TABLE_STATS ('', '');
Tags: Database
Similar Questions
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Job GATHER_STATS collect statistics for the tables 'static '.
Oracle version: 10 gr 2
If a corporate table has not changed (No. DML) in the last 10 days, will be the collection of default oracle job stats
yet collect statistics in this table?DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROCThe answer is no, unless you have changed the default optimizer stats collection of statistics because approximately 10% of the data must have undergone change before that table is elgible for new statistics.
See the next topic in the Performance and Tuning section 14.2.1 GATHER_STATS_JOB Manual:
http://download.Oracle.com/docs/CD/B19306_01/server.102/b14211/stats.htm#sthref1068
HTH - Mark D Powell.
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Collects statistics for tables using jobs in Oracle 11 G 11.2.0.1.0?
Hello
My query is regarding the collection of statistics for tables.
My Version of Oracle DB is:
BANNER
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Oracle Database 11 g Enterprise Edition Release 11.2.0.1.0 - 64 bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
AMT for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
In versions of prior oracle db, we used to schedule tasks to run on a daily basis for collecting statistics. Especially for tables that are frequent and huge inserts.
I read that in 11g stats for all of the schema on a database are automatically make every night jobs. I checked these jobs and I see that they are running on a monthly basis [joined query]. This job is enabled and is scheduled to run monthly.
This means that my diagram will be analyzed on a monthly basis. My understanding is correct?
Can I still plan jobs to collect statistics for specific tables on every week? This will diminish the performance?
We expect 100000 documents to insert on a daily basis.
Thank youSELECT JOB_NAME, START_DATE, REPEAT_INTERVAL, LAST_START_DATE, NEXT_RUN_DATE,ENABLED FROM dba_scheduler_jobs WHERE job_name LIKE '%STAT%' ORDER BY 1; JOB_NAME START_DATE REPEAT_INTERVAL LAST_START_DATE NEXT_RUN_DATE ENABLED ------------------------------ -------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -------------------------------------- -------------------------------------- ------- BSLN_MAINTAIN_STATS_JOB 16-AUG-09 12.00.00.000000000 AM -07:00 14-APR-13 12.00.00.427370000 AM -07:00 21-APR-13 12.00.00.400000000 AM -07:00 TRUE MGMT_STATS_CONFIG_JOB 15-AUG-09 12.24.04.694342000 AM -07:00 freq=monthly;interval=1;bymonthday=1;byhour=01;byminute=01;bysecond=01 01-APR-13 01.01.01.710280000 AM -07:00 01-MAY-13 01.01.01.700000000 AM -07:00 TRUE
SomiyaYour understanding is not correct. These jobs are in dba_autotask_task.
And they will be run every day.HTH
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Sybrand Bakker
Senior Oracle DBA -
How to collect statistics on the table for tables in a different schema
Hi all
I have a table in a schema, and I want to collect statistics for the table in a different schema.
I gave GRANT ALL ON SCHEMA1. T1 TO SCHEMA2;
And when I tried to run the command to collect statistics to help
DBMS_STATS. GATHER_TABLE_STATS (OWNNAME = > 'SCHMEA1', TABNAME = > 'T1');
The function will fail.
Is there a way we can collect statistics of the table for tables in a schema into another schema.
Thank you
MK.You must grant analyze to schema2.
SY.
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Collect statistics of the table in windows
Hello
Could you please help me to collect statistics for the tables below in Windows. I tried collection using dbms_scheduler job for a table, but it is not the collection of statistics for tables.
TABLE_NAME OWNER NUM_ROWS BLOCKS Size MQRDW DWREFERENCETRACE GO 2891985937 26372904, 17.86
TRAY PON_SERIAL 563722072 5135734 GB 8,12
TRAY PON_PSN 23588517 32009064 2.67 GB TRAY PON_BOM_LOG 37199475 212936 601 MB
TRAY UNIQUE_ITEM_LOTS 6633907 79710 160 MB
TRAY PON_BOM 5921377 41717 328 MB SQL > start
(2 dbms_scheduler.create_job)
job_name 3 = > "SCOTT_JOB_SCHEDULE"
job_type 4 = > "EXECUTABLE."
5 job_action = > ' begin dbms_stats.gather_table_stats (ownname = > "TRACE3")
6 tabname = > 'PON_PSN ',.
estimate_percent 7 = > 30,
Cascade 8 = > true,
method_opt 9 = > 'for all THE COLUMNS of SIZE 1.
10 degrees = > 5,
11 options = > "BRINGING OUTDATED"); end;',
12 repeat_interval = > ' freq = daily; byhour = 04; byminute = 0; bysecond = 0; »,
13 active = > TRUE,
14 comments = > ' custom stats collection for engine risk ");
15 end;
17 N
PL/SQL procedure successfully completed .
Total number of CPU available on this server is 8
Oracle - 10.2.0.4.0
OS - windows
Kind regards
Bala
52 million lines?
and how to change every day or be inserted?
It is possible that you can never bring his stats again
and everything will probably continue to work as expected
read the guide to setting performance to understand why you need to collect statistics and when
https://docs.Oracle.com/CD/E11882_01/server.112/e41573/stats.htm#PFGRF94714
After reading this guide, you'll be ready for any question, you get all that against this team
Sometimes you need to say 'no' and why the answer is 'no '.
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collect statistics for the tablespace
Friends...
OS: Linux
DB: 11 GR 2
Data size: 1 TB
I spend monthly multiple partitioned table spaces and bring together in a single annual partition. (for example tbs_2014_01, tbs_2014_02 - tbs_2014_12... all combine them into tbs_2014 as a tablespace)
Over the weekend, work of database gets executed that collects statistics that are obsolete, it collects all the segments that have been moved from the storage.
Given that the collection of statistics at the end of the week takes too long, I tried to find a smart way to collect statistics after each tablespace move rather than waiting for job to weekend which will take two or three days to complete.
1. is there a way to gather statistics at the tablespace level and collect statistics for all objects in this table space?
2. how to determine the overall stats of collection of statistics part?
That is, suppose I have move the tbs_2014_01 tablespace and collect statistics with global stats that could take 2 hours but it will be difficult to spend 2 hours for each stats global tablespace which in my opinion is not good and we should be collecting global stats only once.
3. any other advice?
977272 wrote:
@sol.beach... Thanks for your comments...
I've not been asked to collect statistics to the tablespace but level to collect statistics after that finish objects move in storage.
Given the size of the data, it is difficult to gather all the statistics at the weekend so trying to understand another method to collect the statistics the weekend load will be less.
You can collect statistics object on an object by object basis level after that each object has been moved.
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How to collect statistics for a partition?
Hi all
I create a table partition. I need to collect statistics for this partition only. Before I used to analyze it, but now I need to analyze using DBMS_STATS.
What is the best way to analyze the partition using DBMS_STATS?
How long will it take to complete?
How can I estimate the time of accomplishment for DBMS_STATS before starting?
Thank you
I create a table partition. I need to collect statistics for this partition only. Before I used to analyze it, but now I need to analyze using DBMS_STATS.
What is the best way to analyze the partition using DBMS_STATS?
Follow the documented instructions: INCREMENTIELLE TRUE and GRANULARITY on AUTO.
See the section "Partitioned objects statistics" the doc of performance tuning
http://docs.Oracle.com/CD/B28359_01/server.111/b28274/stats.htm#i42218
With partitioned tables, the new data is usually loaded into a new partition. As new partitions are added and loaded, statistical data must be collected on the new partition and statistics need to be updated. If the
INCREMENTALfor a partition table is set to the valueTRUE, and collect you statistics on the table with theGRANULARITYparameter defined onAUTO, Oracle will collect statistics on the new partition and update statistics on the overall table by scanning only those partitions which have been modified and not the entire table. If theINCREMENTALfor the partitioned table is set to the valueFALSE(the default), then a full table scan is used to maintain the global statistics. It is a highly resource intensive and time-consuming for large party.How long will it take to complete?
No way to know - using an estimate of 10% takes less time than with an estimated of 40%, which takes less time than using 100%.
How can I estimate the time of accomplishment for DBMS_STATS before starting?
By comparing the amount of data and the percentage of estimate for the data that you have in the other partitions and the time required to collect statistics on other partitions.,.
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Collect statistics on the table with indexes of text only?
I gathered statistics for a table that contains a text index
EXEC DBMS_STATS. GATHER_TABLE_STATS (USER, 'CONADDR', estimate_percent = > 10, block_sample = > TRUE, cascade = > TRUE);
There are a lot of tables/indexes not monitored (e.g. DR$ TI_CONADDR$ I). Do I have to analyse the tables there, too? The Guide Tuning Oracle text mentions just to analyze the table of "base".
Oracle DB version is 10.2.0.4.
select table_name, last_analyzed, num_rows from dba_tables where table_name like '%CONADDR%'; CONADDR 11.08.2010 10:29:37 17944660 DR$TI_CONADDR$I DR$TI_CONADDR$R DR$TI_CONADDR$K DR$TI_CONADDR$N select index_name, table_name, last_analyzed, num_rows from dba_indexes where table_name like '%CONADDR%'; SYS_IL0003730268C00004$$ CONADDR IDX_CONADDR CONADDR 11.08.2010 10:29:46 17106050 SYS_IL0003731165C00006$$ DR$TI_CONADDR$I SYS_IOT_TOP_3731168 DR$TI_CONADDR$K SYS_IL0003731170C00002$$ DR$TI_CONADDR$R SYS_IOT_TOP_3731173 DR$TI_CONADDR$N DR$TI_CONADDR$X DR$TI_CONADDR$I 11.08.2010 10:05:05 67585029 TI_CONADDR CONADDR 11.08.2010 10:29:46DR$ table do NOT need to be analysed - and should not be.
As "secondary objects", they will not be analyzed by orders based on patterns, and it is strongly recommended to not analyze manually. All commands that access these tables are set correctly without the input of the optimizer.
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Race statistics for a table of 168 GB
Hello
I need to run stats gather for a 168GB table in the background.
The output should be wrapped in a file that we need to track progress in several teams.
/**********************************************************************************
* PROGRAM: HISTORY FIX FOR TABLE EDW. CLAIM_LINE_HMOPPO
* CREATED BY: CHRISTIAN S
* CREATION DATE: December 19, 2012
* SHORT DESC: Collect stats on TABLE CLAIM_LINE_HMOPPO_BKP
**********************************************************************************/
SET TIMING ON
SET ECHO ON
WHENEVER SQLERROR CONTINUE
/ * Collection of statistics for EDWSTG. HMOPPO_GAP_LINE_TEMP3 * /.
BEGIN
DBMS_STATS. GATHER_TABLE_STATS (OWNNAME = > 'EDWSTG', TABNAME = > 'CLAIM_LINE_HMOPPO_BKP', ESTIMATE_PERCENT = > DBMS_STATS.) AUTO_SAMPLE_SIZE, METHOD_OPT = > 'FOR ALL COLUMNS SIZE AUTO', CASCADE = > TRUE);
END;
/
QUIT SMOKING
/
Please let me know the procedure to operate the same.
Kind regards
VNThe output should be wrapped in a file that we need to track progress in several teams.
follow the progress of V$ SESSION_LONGOPS
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collect statistics of the table
Hi all
DB version: 10.2.0.4
OS: AIX 6.1
I want to collect the stats table for a table as the query that uses that table is slow. Also, I noticed that this table is using full table scan, and it has been analyzed in last 2 months back.
I intend to run the query to collect the statistics below. The table has 50 million records.
COUNT (*)
----------
51364617
I expect that this will take time if I run the query as below.
DBMS_STATS.gather_table_stats EXEC ('schema_name', 'table_name');
My doubts specified below.
1. can I use the also estimate_percent parameter to collect statistics?
2 should. how much we indicate for the estimate_percent parameter?
3. what difference it will make if I use the estimate_percent parameter?
Thanks in advance
Published by: user13364377 on March 27, 2012 13:28If you are worried about the stats of collection process for a long time running, consider collecting statistics in parallel.
1. can you use estimate_percent? Sure! Go ahead.
2. what percentage of use? Why not let the data decide with auto_sample_size? Various "rules of thumb" were thrown around over the years, usually about 10 to 20%.
3. what difference it will make? Very little, no doubt. Occasionally, you can see where a small sample makes a difference, but in general that it's perfectly ok to estimate its stats.Maybe something like this:
BEGIN dbms_stats.gather_table_stats(ownname => user, tabname => 'MY_TABLE', estimate_percent => dbms_stats.auto_sample_size, method_opt=>'for all columns size auto', cascade=>true,degree=>8); END; -
What is advised to collect statistics for the huge tables?
We have a staging database, some tables are huge, hundreds GB in size. Auto stats tasks are performed, but sometimes it will miss deadlines.
We would like to know the best practices or tips.
Thank you.
Improvement of the efficiency of the collection of statistics can be achieved with:
- Parallelism using
- Additional statistics
Parallelism using
Parallelism can be used in many ways for the collection of statistics
- Parallelism object intra
- Internal parallelism of the object
- Inner and Intra object jointly parallelism
Parallelism object intra
The
DBMS_STATSpackage contains theDEGREEparameter. This setting controls the intra parallelism, it controls the number of parallel processes to gather statistics. By default, this parameter has the value is equal to 1. You can increase it by using theDBMS_STATS.SET_PARAMprocedure. If you do not set this number, you can allow oracle to determine the optimal number of parallel processes that will be used to collect the statistics. It can be achieved if you set the DEGREE with the DBMS_STATS. Value AUTO_DEGREE.Internal parallelism of the object
If you have the 11.2.0.2 version of Oracle database you can set SIMULTANEOUS preferences that are responsible for the collection of statistics, preferably. When there is TRUE value at the same TIME, Oracle uses the Scheduler and Advanced Queuing to simultaneously manage several jobs statistics. The number of parallel jobs is controlled by the JOB_QUEUE_PROCESSES parameter. This parameter must be equal to two times a number of your processor cores (if you have two CPU with 8 cores of each, then the JOB_QUEUE_PROCESSES parameter must be equal to 2 (CPU) x 8 (cores) x 2 = 32). You must set this parameter at the level of the system (ALTER SYSTEM SET...).
Additional statistics
This best option corresponds to a partitioned table. If the INCREMENTAL for a partitioned table parameter is set to TRUE and the DBMS_STATS. GATHER_TABLE_STATS GRANULARITY setting is set to GLOBAL and the parameter of DBMS_STATS ESTIMATE_PERCENT. GATHER_TABLE_STATS is set to AUTO_SAMPLE_SIZE, Oracle will scan only the partitions that have changes.
For more information, read this document and DBMS_STATS
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When the need to update the statistics for a table
In Sybase, we use "delete the statistics', 'update all statistics" and 'sp_recompile', fact Oracle need to do such things anyway? Thank you!
Given that the V10 by default Oracle collects "necessary" statistics (new) once every 24 hours.
If you determine that your situation requires a different treatment, so you must do manually what you feel is appropriate.
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AUTHID CURRENT_USER collect statistics
Hi all
I use Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production. I created a procedure that collects statistics from table using DBMS_STATS using AUTHID CURRENT_USER to SChema1.
CREATE OR REPLACE PROCEDURE SCHEMA1.getstats ( p_schema IN VARCHAR2, p_table IN VARCHAR2) AUTHID CURRENT_USER AS BEGIN dbms_stats.gather_table_stats(ownname => p_schema, tabname => p_table, method_opt => 'FOR ALL COLUMNS SIZE AUTO', degree => 8, force => true, no_invalidate => false); END;
I'm trying to use the same procedure to collect statistics for a table in another schema. However, I get the error ORA-20000: impossible to analyze the TABLE ' ' SCHEMA2.» DETAIL_VALUE', insufficient privileges or does not exist
EXEC getstats ( 'SCHEMA2','DETAIL_VALUE');
I grant privileges on the table to SCHEMA1. But still get the error. I understand AUTHID CURRENT_USER will attempt to use as long as the procedure as own drawing, but still, I get the error. Can someone help me on this?
GRANT ALL ON DETAIL_VALUE TO SCHEMA1
It has nothing to do with authid user current and everything to do with the privileges. Grant on the table is not enough for you to analyze.
SQL> conn u1/u1 Connected. SQL> create table foo(bar number); Table created. SQL> grant all on foo to u2; Grant succeeded. SQL> conn u2/u2 Connected. SQL> exec dbms_stats.gather_table_stats('U1', 'FOO'); BEGIN dbms_stats.gather_table_stats('U1', 'FOO'); END; * ERROR at line 1: ORA-20000: Unable to analyze TABLE "U1"."FOO", insufficient privileges or does not exist ORA-06512: at "SYS.DBMS_STATS", line 33859 ORA-06512: at line 1 SQL> conn / as sysdba Connected. SQL> grant analyze any to u2; Grant succeeded. SQL> conn u2/u2 Connected. SQL> exec dbms_stats.gather_table_stats('U1', 'FOO'); PL/SQL procedure successfully completed. -
Collect statistics in oracle 11 g
Hi all
OPERATING SYSTEM: AIX
DB: 11GI am trying to collect statistics for a specific schema using the mentioned below command:
> exec dbms_stats.gather_schema_stats ('schema_name');
The schema of such size is 140 GB, and it's almost an hour that the above command is still running.
I need to know if it is normal, is there a way to set the control above to the acceleration of reunification.And how can we check if the above command runs successfully from the background, I mean if there is anyway or something like that?
Kind regards
SphinxHello
The runtime for a 140 GB schema seems quite OK.
Without any other parameters, the work of gather_stats will use the 'compute' option, which takes a long calculation for each table.
I've written a procedure that checks for 'fade' in dba_tab_statistics tables and calculates these statistics only.
The request for these tables up looks like:
SELECT table_name, 'NONE' AS nom_partition
OF dba_tab_statistics one
Owner WHERE = i_schema
AND NVL (stale_stats, 'NULL') = 'YES '.
AND NVL (stattype_locked, 'NULL') = 'NULL '.
AND NOT EXISTS
(SELECT 1
FROM dba_tab_partitions b
WHERE table_owner = i_schema
AND a.table_name = b.table_name)
UNION ALL
SELECT table_name, nom_partition
OF dba_tab_statistics one
Owner WHERE = i_schema
AND NVL (stale_stats, 'NULL') = 'YES '.
AND NVL (stattype_locked, 'NULL') = 'NULL '.
AND nom_partition IS NOT NULL;
The preceding section is smooth tables, the lower part is flawed partitions for partitioned tables.
It allows the procedure to collect statistics for the tables and one or more partitions.
It ignores the tables that were calculated before the work of the default oracle.
See you soon,.
FJFranken
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Have we not collect statistics after reorg?
Hello
I did a reorg to a few tables and indexes. After the reorg, I need to collect statistics for these objects?
Database version: 11.2.0.2
Kind regards
Sarayu K.S.... [url http://docs.oracle.com/cd/B28359_01/server.111/b28310/tables006.htm#i1106606] all the statistics in the table become invalid and new statistics should be collected after the removal of the table.
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