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Re: Sun Donated a Sun Fire T2000 to the PostgreSQL
- 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: Sun, 23 Jul 2006 19:52:16 -0400
- Message-id: <28596.1153698736@sss.pgh.pa.us> <text/plain>
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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