Re: Parallel degrees in DBMS_STATS

Run following query and check whether relevent table/index has degree > 1 select index_name,degree from dba_indexes where degree > 1
/

select table_name,degree from dba_tables where degree > 1
/

If degree > 1 then it will use nymber of PQ process equivalent to number od degree....

Regards
Rafiq

Reply-To: ORACLE-L_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: Tue, 28 May 2002 11:18:30 -0800

Hey all,

I'm using DBMS_STATS (despite it's bugs) on 8.1.7.2.0 / HPUX 11.0. When I specify "degree => 2" in the parms for either GATHER_SCHEMA_STATS or GATHER_TABLE_STATS, I notice that 4 "p" processes are kicked off (e.g. "ora_p001_sid"). Since this is on a test system, there is only one processor. Two of the stats processes have higher CPU and little or no I/Os, while the other two are almost all physical I/O and some CPU (probably for the I/O requests).

So, why are there four processes? I ASSuMEd that there'd only be two. And I can't find the FM to R, nor anything suitable on MetaClink.

Anyone?

TIA!

Rich Jesse                           System/Database Administrator
Rich.Jesse_at_qtiworld.com              Quad/Tech International, Sussex, WI USA

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MOHAMMAD RAFIQ


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