Re: For index bloat: VACUUM ANALYZE vs REINDEX/CLUSTER

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Ow Mun Heng <Ow(dot)Mun(dot)Heng(at)wdc(dot)com>
Cc: Phoenix Kiula <phoenix(dot)kiula(at)gmail(dot)com>, Postgres General <pgsql-general(at)postgresql(dot)org>
Subject: Re: For index bloat: VACUUM ANALYZE vs REINDEX/CLUSTER
Date: 2007-09-18 05:59:12
Message-ID: 46EF6930.2090604@commandprompt.com
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Ow Mun Heng wrote:
> On Mon, 2007-09-17 at 22:14 -0700, Joshua D. Drake wrote:
>> Phoenix Kiula wrote:
>>> So a YES/NO question:
>>>
>>> Q: To get rid of index bloat, is a VACUUM ANALYZE enough? Or must I
>>> reindex/cluster indexes?
>> If you overrun your max_fsm_pages, no:
>> else yes;
>
> Maybe my english suck, but I don't understand the above answer.
>
> If I overrun my Max_FSM_pages then a vacuum analyse is enough to return
> it back to normal.

If you overrun your max_fsm_pages then vacuum analyze IS NOT ENOUGH. If
you do not overrun your max_fsm_pages, yes vacuum analyze can deal with
the issue.

Joshua D. Drake

>
> If I _didn't_ overrun my fsm, then a reindex/cluster is necessary.
>
> Did I get that right? (I feel it's wrong and a reindex/cluster is needed
> only when I overrun my max_fsm)
>
>
>

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