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Re: LWLock contention: I think I understand the problem

From: Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>
To: tgl(at)sss(dot)pgh(dot)pa(dot)us
Cc: pgman(at)candle(dot)pha(dot)pa(dot)us, pgsql-hackers(at)postgresql(dot)org, jwbaker(at)acm(dot)org
Subject: Re: LWLock contention: I think I understand the problem
Date: 2001-12-30 07:53:09
Message-ID: 20011230165309K.t-ishii@sra.co.jp (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-odbc
> > If you code up a patch, I will test it on my SMP machine using pgbench. 
> > Hopefully this will help Tatsuo's 4-way AIX machine too, and Linux.
> 
> Attached is a proposed patch (against the current-CVS version of
> lwlock.c).  I haven't committed this yet, but it seems to be a win on
> a single CPU.  Can people try it on multi CPUs?

Your patches seem lightly enhanced 7.2 performance on AIX 5L (still
slower than 7.1, however).

Attachment: bench.png
Description: image/png (6.2 KB) (inlined above)

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