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Re: lazy_truncate_heap()

From: Greg Stark <greg(dot)stark(at)enterprisedb(dot)com>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: lazy_truncate_heap()
Date: 2008-12-31 19:45:18
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On 31 Dec 2008, at 13:21, Simon Riggs <simon(at)2ndQuadrant(dot)com> wrote:
> Both of these bugs are minor, but the effect of either/both of them is
> to cause more AccessExclusiveLocks than we might expect.
> For Hot Standby this means that many VACUUMs take AccessExclusiveLocks
> on relations, which would potentially lead to having queries cancelled
> for no reason at all.

Well by default it would just cause wal to pause briefly until the  
queries with those locks finish, no?

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Subject: Re: lazy_truncate_heap()
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