> > 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. > > > > 18% in s_lock is definitely bad :-(. Were you able to determine which > > LWLock(s) are accounting for the contention? > > Yes. We were interested in that too. Some people did addtional tests > to determin that. I don't have the report handy now. I will report > back next week. Sorry for the delay. Finally I got the oprofile data. It's huge(34MB). If you are interested, I can put somewhere. Please let me know. -- Tatsuo Ishii SRA OSS, Inc. Japan
