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Date: Mon, 9 Nov 2009 06:46:29 -0800
Message-ID: <f2fd819a0911090646w159e6e4bu309742528554068f@mail.gmail.com>
Subject: Re: CREATE TABLE slowing down significantly over time
From: Anj Adu <fotographs@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Aris Samad-Yahaya <aris@quickschools.com>, Tom Lane <tgl@sss.pgh.pa.us>,
	pgsql-performance@postgresql.org
Content-Type: text/plain; charset=ISO-8859-1

Why is reindex needed ?    Unless most of the key values get deleted
frequently..this is not needed. (I am assuming postgres 8.x and above)

On Sun, Nov 8, 2009 at 7:58 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> On Sat, Nov 7, 2009 at 11:58 PM, Aris Samad-Yahaya
> <aris@quickschools.com> wrote:
>> We vacuum analyze nightly, and vacuum normally ad-hoc (but we're going to
>> schedule this weekly moving forward).
>>
>> Interesting pointer about system catalog bloat. I tried to vacuum full the
>> system catalog tables (pg_*), and the performance for creating a single
>> table manually improved dramatically (back to what it used to be), but as
>> soon as I created the next schema, the performance went back down to the
>> same level.
>>
>> So there's a clue there somewhere. Next I will try to vacuum full the entire
>> database.
>
> And maybe REINDEX, too.
>
> ...Robert
>
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