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Re: AW: AW: AW: AW: Vacuum only with 20% old tuples

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Zeugswetter Andreas SB <ZeugswetterA(at)wien(dot)spardat(dot)at>
Cc: "'Hiroshi Inoue'" <Inoue(at)tpf(dot)co(dot)jp>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: AW: AW: AW: AW: Vacuum only with 20% old tuples
Date: 2000-07-27 14:03:42
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Zeugswetter Andreas SB <ZeugswetterA(at)wien(dot)spardat(dot)at> writes:
> But yes the rename log entries (only those) would need to be 
> written immediately. Is this a performance issue? I guess not.

Two fsyncs per rename is probably not a performance killer, but you'd
have to also fsync log entries for file creates and deletes, which
might be a bigger deal.

			regards, tom lane

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