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Re: Multicolumn Primary Key

From: "Matthew T(dot) O'Connor" <matthew(at)zeut(dot)net>
To: Steve Crawford <scrawford(at)pinpointresearch(dot)com>
Cc: "Thomas F(dot)O'Connell" <tfo(at)sitening(dot)com>,Martijn van Oosterhout <kleptog(at)svana(dot)org>,pgsql-general(at)postgresql(dot)org
Subject: Re: Multicolumn Primary Key
Date: 2004-08-31 23:44:33
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-general
Steve Crawford wrote:
> On Tuesday 31 August 2004 3:49 pm, Matthew T. O'Connor wrote:
>>pg_autovacuum only knows about table activity that has taken place
>>while it's running.  Example:  Table A has an analyze threshold of
>>1000, if you perform 999 updates on table A, then kill and restart
>>pg_autovacuum, you will have to perform another 1000 updates before
>>pg_autovacuum performs an ANALYZE.  This is a large limitation of
>>the current implementation.
>>I tried to fix this for 8.0, but my autovacuum improvements didn't
>>make the cut.
> As a quick-'n'-dirty "fix", what about a command-line option to 
> autovacuum that tells it to vacuum analyze all tables on startup? At 
> least it would start in a somewhat known condition.

I thought having pg_autovacuum do that, but seemed like overkill, but 
perhaps a command line option wouldn't be a bad thing.  However, you 
could also just as easily do a manual vacuum analyze whenever you like.


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