Tatsuo Ishii <ishii@xxxxxxxxxxxx> 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
