[pgpool-general: 3964] Re: accept() scalability issues
ishii at postgresql.org
Fri Aug 14 09:25:51 JST 2015
>> Ok, here is the experimental patch to serialize select(2) for listen
>> fds by using semaphore. Could you please try it out? The patch is
>> against 3.3-stable.
> Thank you very much, that worked fine!
> In a synthetic test with 1000 children and ~30 connections per second this lowered the amount of context switches from ~38.000/sec to ~1.000/sec.
Great. I'm also interested in if my patch somewhat enhances
> We’ll test it in production mid next week, will let you know how things go.
Looking forward to hearing from you next week!
SRA OSS, Inc. Japan
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