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From: me@alternize.com
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: new to postgres (and db management) and performance already a problem :-(
Date: Tue, 17 Jan 2006 02:29:43 +0100
Message-ID: <071801c61b05$7ea50c10$6402a8c0@iwing> (raw)
References: <43CC1938.7020807@gmail.com>
	<18875.1137451410@sss.pgh.pa.us>
	<070501c61aee$ed450560$6402a8c0@iwing>
	<22960.1137460135@sss.pgh.pa.us>

>> in our db system (for a website), i notice performance boosts after a 
>> vacuum
>> full. but then, a VACUUM FULL takes 50min+ during which the db is not 
>> really
>> accessible to web-users. is there another way to perform maintenance 
>> tasks
>> AND leaving the db fully operable and accessible?
>
> You're not doing regular vacuums often enough.

well, shouldn't autovacuum take care of "regular" vacuums? in addition to 
autovacuum, tables with data changes are vacuumed and reindexed once a day - 
still performance seems to degrade slowly until a vacuum full is 
initiated... could an additional daily vacuum over the entire db (even on 
tables that only get data added, never changed or removed) help?

- thomas 





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