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Re: futex results with dbt-3

From: Manfred Spraul <manfred(at)colorfullife(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: neilc(at)samurai(dot)com, markw(at)osdl(dot)org,pgsql-performance(at)postgresql(dot)org
Subject: Re: futex results with dbt-3
Date: 2004-10-25 17:30:38
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Tom Lane wrote:

>It could be that I'm all wet and there is no relationship between the
>cache line thrashing and the seemingly excessive BufMgrLock contention.
Is it important? The fix is identical in both cases: per-bucket locks 
for the hash table and a buffer aging strategy that doesn't need one 
global lock that must be acquired for every lookup.


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