| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp> |
| Cc: | Robert(dot)Lor(at)Sun(dot)COM, pgsql-hackers(at)postgresql(dot)org, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Sun Donated a Sun Fire T2000 to the PostgreSQL |
| Date: | 2006-07-23 23:52:16 |
| Message-ID: | 28596.1153698736@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-performance |
Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp> writes:
>>> Interesting. We (some Japanese companies including SRA OSS,
>>> Inc. Japan) did some PG scalability testing using a Unisys's big 16
>>> (physical) CPU machine and found PG scales up to 8 CPUs. However
>>> beyond 8 CPU PG does not scale anymore. The result can be viewed at
>>> "OSS iPedia" web site (http://ossipedia.ipa.go.jp). Our conclusion was
>>> PG has a serious lock contention problem in the environment by
>>> analyzing the oprofile result.
Can you retry this test case using CVS tip? I'm curious to see if
having partitioned the BufMappingLock helps ...
regards, tom lane
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