Re: Partitioned table space stats ... Incremental question and TEMP tablespace usage...
- From: Kellyn Pot'vin <kellyn.potvin@xxxxxxxxx>
- To: "greg@xxxxxxxxxxxxxxxxxx" <greg@xxxxxxxxxxxxxxxxxx>, "dmann99@xxxxxxxxx" <dmann99@xxxxxxxxx>
- Date: Thu, 22 Mar 2012 09:18:55 -0700 (PDT)
Outside of Greg's very good question, I also have one- Are there any indexes
on this partitioned table? I just took a quick scan through your email, but if
you have chosen "TRUE" on CASCADE and you have global indexes on the
partitioned table, that could easily explain the temp issue.
I don't see anything specifying if there are any indexes or not, but thought
I'd ask... :)
Kellyn Pot'Vin
Senior Technical Consultant
Enkitec
DBAKevlar.com
________________________________
From: Greg Rahn <greg@xxxxxxxxxxxxxxxxxx>
To: dmann99@xxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx
Sent: Thursday, March 22, 2012 9:34 AM
Subject: Re: Partitioned table space stats ... Incremental question and TEMP
tablespace usage...
What sql statement (from dbms_stats) is the one spilling to temp and
failing?
Gathering table stats should not spill to temp with AUTO_SAMPLE_SIZE. This
is because there is no sort in 11g when using AUTO_SAMPLE_SIZE due to the
fast NDV algorithm. If you switch to a percent, it will require a sort and
may spill to temp as well.
FYI - only the first (incremental) set_table_prefs is required -- the other
two are the defaults already.
On Thu, Mar 22, 2012 at 8:12 AM, David Mann <dmann99@xxxxxxxxx> wrote:
> This is a generic 11.1.0.7 (straight install with no patches) on Solaris
> 64-bit
>
> Table MYSCHEMA.MYTABLE has 42 partitions, 15 gb across all partitions,
> largest partition is 1.75gb, but most are in the 300mb range.
>
> I have 64gb temp space defined for this database, and no one else is
> logged on.
>
> I have the table stats preferences configured like this:
>
> EXEC DBMS_STATS.set_table_prefs('MYSCHEMA', 'MYTABLE', 'INCREMENTAL',
> 'TRUE');
> EXEC DBMS_STATS.set_table_prefs('MYSCHEMA', 'MYTABLE', 'GRANULARITY',
> 'AUTO');
> EXEC DBMS_STATS.set_table_prefs('MYSCHEMA', 'MYTABLE',
> 'ESTIMATE_PERCENT', DBMS_STATS.AUTO_SAMPLE_SIZE);
>
> And then execute the following:
> EXEC DBMS_STATS.gather_table_stats('MYSCHEMA', 'MYTABLE',DEGREE=>4);
>
> The stats gathering chugs along and after about 45 minutes it fails with:
> ERROR at line 1:
> ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
> ORA-06512: at "SYS.DBMS_STATS", line 18408
> ORA-06512: at "SYS.DBMS_STATS", line 18429
> ORA-06512: at line 1
>
>
--
Regards,
Greg Rahn | blog <http://bit.ly/u9N0i8> | twitter <http://bit.ly/v733dJ> |
linkedin <http://linkd.in/gregrahn>
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