How stop the automatic statistics collection job after the maintenance wind

Hi,
we are for a solution to stop the automatic statistics collection job after the maintenance window finished.
we disable all jobs except the automatic statistics collection, because this is the only one we want to run. Then we define specific values for the interval and duration parameters of the maintenance window to customize this task.
But for their systems it is very important that this job/task will immediately stop when the window is closed!!!
So, how could we ensure this behavior.
For Oracle 10g it is easy because the statistic job always exists and it is possible to set its duration and create an addtional event based job which kills all jobs that are running over duration.
In Oracle 11g the statistic job is created by the system during the maintenance window is open.
We are not able to modify parameters of this system job. After the maintenance window closed the job is already running - only with another resource priority - but it is running.
Please help me in this scenario
Thanks&Regards
Prem

?So basically you are saying is if none of the tables are changed then GATHER_STATS_JOB will not run, but i see tables are updated still the job is not running. I did >query dba_scheduler_jobs and the state of the job is true and scheduled. Please see my previous post on the output
Am i missing anything here, do i look for some parameters settings
So basically you are saying is if none of the tables are changed then GATHER_STATS_JOB will not run,GATHER_STATS_JOB will run and if there are any table in which there's a 10 percent change in data, it will gather statistics on that table. If no table data have changes less than 10 percent, it will not gather statistics.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41282
Hope this helps.
-Anantha

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How to disable automatic statistics collections on tables

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I am using Oracle 10g and we have few tables which are frequently truncated and news rows added to it. Oracle automatically analyzes the table by some means which collects statistics of the table but at the wrong time(when the table is empty). This makes my query to do a full table scan rather using indexes since the statistics was collected when the table was empty.Could any one please let me know how to disable the automatic statistics collection feature of Oracle?
Cheers
Anantha PV

Hi
I am using Oracle 10g and we have few tables which
are frequently truncated and news rows added to it.
Oracle automatically analyzes the table by some means
which collects statistics of the table but at the
wrong time(when the table is empty). This makes my
query to do a full table scan rather using indexes
since the statistics was collected when the table was
empty.Could any one please let me know how to disable
the automatic statistics collection feature of
Oracle?
First of all I think it's important that you understand why Oracle collects statistics on these tables: Because it considers the statistics of the object to be missing or stale. So if you just disable the statistics gathering on these tables then you won't have statistics at all or outdated statistics.
So as said by the previous posts you should gather the statistics manually yourself anyway. If you do so right after loading the data into the truncated table, you don't need to disable the automatic statistics gathering as it only processes objects that are stale or don't have statistics at all.
If you still think that you need to disable it there are several ways to accomplish it:
As already mentioned, for particular objects you can lock the statistics using DBMS_STATS.LOCK_TABLE_STATS, or for a complete schema using DBMS_STATS.LOCK_SCHEMA_STATS. Then these statistics won't be touched by the automatic gathering job. You still can gather statistics using the FORCE=>true option of the GATHER__STATS procedures.
If you want to change the automatic gathering job that it only gathers statistics on objects owned by Oracle (data dictionary, AWR etc.), then you can do so by calling DBMS_STATS.SET_PARAM('AUTOSTATS_TARGET', 'ORACLE'). This is the recommended method.
If you disable the schedule job as mentioned in the documentation by calling DBMS_SCHEDULER.DISABLE('GATHER_STATS_JOB') then no statistics at all will be gathered automatically, causing your data dictionary statistics to be become stale over time, which could lead to suboptimal performance of queries on the data dictionary.
All this applies to Oracle 10.2, some of the features mentioned might not be available in Oracle 10.1 (as you haven't mentioned your version of 10g).
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Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
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http://sourceforge.net/projects/sqlt-pp/

Oracle automatic statistics optimizer job is not running after full import

Hi All,
I did a full import in our QA database, import was successful, however GATHER_STATS_JOB is not running after sep 18 2010 though its enable and scheduled, i did query last_analyzed table to check and its confirmed that it didnt ran after sep18,2010.
Please refer below for the output
OWNER JOB_NAME ENABL STATE START_DATE END_DATE LAST_START_DATE NEXT_RUN_D
SYS GATHER_STATS_JOB TRUE SCHEDULED 18-09-2010 06:00:02
Oracle defined automatic optimizer statistics collection job
=======
SQL> select OWNER,JOB_NAME,STATUS,REQ_START_DATE,
to_char(ACTUAL_START_DATE, 'dd-mm-yyyy HH24:MI:SS') ACTUAL_START_DATE,RUN_DURATION
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job_name='GATHER_STATS_JOB' order by ACTUAL_START_DATE asc; 2 3 4
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RUN_DURATION
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+000 00:00:22
SYS GATHER_STATS_JOB SUCCEEDED 17-09-2010 22:00:02
+000 00:00:18
SYS GATHER_STATS_JOB SUCCEEDED 18-09-2010 06:00:02
+000 00:00:26
What could be the reason for GATHER_STATS_JOB job not running although its set to auto
SQL> select dbms_stats.get_param('AUTOSTATS_TARGET') from dual;
DBMS_STATS.GET_PARAM('AUTOSTATS_TARGET')
AUTO
Does anybody has this kind of experience, please share
Apprecitate your responses
Regards
srh

?So basically you are saying is if none of the tables are changed then GATHER_STATS_JOB will not run, but i see tables are updated still the job is not running. I did >query dba_scheduler_jobs and the state of the job is true and scheduled. Please see my previous post on the output
Am i missing anything here, do i look for some parameters settings
So basically you are saying is if none of the tables are changed then GATHER_STATS_JOB will not run,GATHER_STATS_JOB will run and if there are any table in which there's a 10 percent change in data, it will gather statistics on that table. If no table data have changes less than 10 percent, it will not gather statistics.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41282
Hope this helps.
-Anantha

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Sorry for the clumsy title.
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execute DBMS_STATS.GATHER_SCHEMA_STATS(ownname => 'DBUSER',
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Best regards!
Markus

1. There is a database and table option called MONITORING. By default this is turned on from 10g. So database is watching for changes and will collect statistics on tables/objects where needed in GATHER AUTO option.
2. No GATHER AUTO options wont be touched but you recollect stats on objects you specified in function/procedure call. And if those objects wont change in the future AUTO GATHER may wont touch these stats anymore....
This is a doc reference list I created when I was working on similar issue. :)
Best Practices for automatic statistics collection on Oracle 10g [ID 377152.1]
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=BULLETIN&id=377152.1
How to check what automatic statistics collection is scheduled on 10g [ID 377143.1]
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&id=377143.1
How To Extend Maintenance Windows For GATHER_STATS_JOB for More Than 8 Hours? [ID 368475.1]
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&id=368475.1
Oracle 10g PL/SQL Packages and Types Reference - DBMS_SCHEDULER documentation
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_sched.htm#CIHHBGGI
Oracle 10g PL/SQL Packages and Types Reference - DBMS_STATS documentation
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_stats.htm#CIHBIEII
Oracle® Database Performance Tuning Guide 10g Release 2 (10.2) 14 Managing Optimizer Statistics 14.2 Automatic Statistics Gathering
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41282
Statistics Best Practices: How to Backup and Restore Statistics [ID 464939.1]
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&id=464939.1
Managing CBO Stats during an upgrade to 10g or 11g [ID 465787.1]
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=HOWTO&id=465787.1

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How stop the automatic statistics collection job after the maintenance wind

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