From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Magnus Hagander <mha(at)sollentuna(dot)net> |
Cc: | PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org> |
Subject: | Re: pgstat: delayed write of stats file |
Date: | 2006-04-27 00:06:52 |
Message-ID: | 200604270006.k3R06qw25565@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-patches |
Patch applied. Thanks.
---------------------------------------------------------------------------
Magnus Hagander wrote:
> Per some earlier discussion, here is an attempt at implementing a
> "delayed write" of the pgstats file, to decrease the write activity on
> that file.
>
> It changes so the file is only written once every 5 minutes (changeable
> of course, I just picked something) instead of once every half second.
> It's still written when the stats collector shuts down, just as before.
> And it is now also written on backend request. A backend requests a
> rewrite by simply sending a special stats message. It operates on the
> assumption that the backends aren't actually going to read the
> statistics file very often, compared to how frequent it's written today.
>
>
> //Magnus
Content-Description: pgstat_delay.patch
[ Attachment, skipping... ]
>
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> TIP 2: Don't 'kill -9' the postmaster
--
Bruce Momjian http://candle.pha.pa.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
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