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Home -> Community -> Mailing Lists -> Oracle-L -> Re: [Fwd: Re: I may never see this again. SGA]
This system is a wonderful example of something having 'an infinite capacity to wait'.
My best solution is to club the consultants that suggested default parallel degrees between 8 and 16 be placed on the tables, then club the developers that allowed it. Following the clubbing, immediate sacking is recommended. Then, cut down the default parallelism to a reasonable level if people still insist on using parallel query, then redesign the ~550 tables that have 180+ partitions each into a good logical and physical design and hire developers that know what they are doing to fix the application.
After all that is done, the PX Deq waits and cache buffers chains waits will take care of themselves....
I think you know the database of which I speak, Joe...
<jtesta_at_dmc-it.com>
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Subject: [Fwd: Re: I
may never see this again. SGA]
06/14/2004 04:41 PM
Please respond to
oracle-l
Ok i'll bite, whats the solution for the PX Deq and Cache Buffer chains waits?
joe
original message below>
>
Bah.
On a 24-CPU sun box w/96 GB of memory, one 2 TB database. You should see the PX Deq and cache buffers chains waits!! Completely obscene. It's a train wreck. But, we have to do what the customers demand...
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.4.0 - 64bit Production With
the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.4.0 - Production
SQL> show sga
Total System Global Area 7.2311E+10 bytes
Fixed Size 835056 bytes Variable Size 2499805184 bytes Database Buffers 6.9810E+10 bytes Redo Buffers 319488 bytes ----------------------------------------------------------------Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- 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 Tue Jun 15 2004 - 07:24:49 CDT
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