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Home -> Community -> Mailing Lists -> Oracle-L -> Re: V$SEGMENT_STATISTICS
Thanks Nanda
I set statistic to all, made a select but statistic in this table didn't changed.
I never used statistics, because I don't have really performance problems
(depending on the database we have from 3 to 60 concurrent sessions), and
when you don't have
performance problems you don't learn to tune, the most I did
is get a full trace log and send to www.oraperf.com, I study it to get my
OCP, but never
practice, neither have a real experience with events. Most of the time I'm
developing.
I know this is a stupid question
1. If I do a lock exclusive in one session, and in ther other I do the same,
does this will generate a event?
2. What kind of situation will generate a change in the segments statistics
in a table.
SELECT OBJECT_NAME,STATISTIC_NAME, VALUE
FROM V$SEGMENT_STATISTICS
WHERE OWNER = 'DAZ'
And OBJECT_NAME = 'DEFINICION_UNIDAD_PROGRAMACION'?
3. Could you giveme an example. ( the most simple you can do which will generate a change in a event in this table)
Thanks for your patiente
> Juan,
>
> I'm the author of that article. You don't have to use STATSPACK to get the
> segment stats data. All you have to do is to set the STATISTICS_LEVEL
> init.ora parameter to TYPICAL, or just don;t define it at all and the
> v$segstat will be populated. If it's not populated, I would suspect the
> parameter has been set to BASIC. You can reset it using ALTER SYSTEM.
>
> You can check the settings by:
> SELECT ACTIVATION_LEVEL, STATISTICS_NAME, SYSTEM_STATUS, SESSION_STATUS
> FROM V$STATISTICS_LEVEL
> ORDER BY ACTIVATION_LEVEL, STATISTICS_NAME;
>
> Hope this helps.
>
> Arup
>
> ----- Original Message -----
> From: "Juan Cachito Reyes Pacheco" <jreyes_at_dazasoftware.com>
> To: <oracle-l_at_freelists.org>
> Sent: Tuesday, March 09, 2004 4:34 PM
> Subject: V$SEGMENT_STATISTICS
>
>
> > Hi, I read an article http://www.dbazine.com/nanda1.html
> > And this some tests, some one can share his experience using it,
> > some tricks?
> >
> > For example is there a way to fill them without using statpacks
> > I tried
> > EXECUTE IMMEDIATE 'alter session set TIMED_STATISTICS=TRUE';
> > EXECUTE IMMEDIATE 'alter session set STATISTICS_LEVEL=ALL';
> > EXECUTE IMMEDIATE 'alter session set max_dump_file_size=UNLIMITED';
> > EXECUTE IMMEDIATE 'ALTER SESSION SET EVENTS ''10046 TRACE NAME CONTEXT
> > FOREVER, LEVEL 12''';
> > and didn't worked
> >
> > Thank you :)
> >
> >
> > p.d. there is a free oracle database day dba.
> > http://download-west.oracle.com/docs/cd/B12037_01/server.101/b10742.pdf
> >
> >
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-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Wed Mar 10 2004 - 06:57:36 CST
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