Re: [PERFORM] More detail on settings for pgavd?

From: "Matthew T(dot) O'Connor" <matthew(at)zeut(dot)net>
To: Shridhar Daithankar <shridhar_daithankar(at)myrealbox(dot)com>
Cc: Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-performance(at)postgresql(dot)org, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PERFORM] More detail on settings for pgavd?
Date: 2003-11-20 16:32:24
Message-ID: 3FBCEC98.4080309@zeut.net
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Shridhar Daithankar wrote:

>On Thursday 20 November 2003 20:00, Matthew T. O'Connor wrote:
>
>
>>Shridhar Daithankar wrote:
>>
>>
>>>I am still wary of inverting vacuum analyze frequency. You think it is
>>>better to set inverted default rather than documenting it?
>>>
>>>
>>I think inverting the vacuum and analyze frequency is wrong.
>>
>>
>Me. Too. ATM all I can think of this patch attached. Josh, is it sufficient
>for you?..:-)
>
>
The patch just adds an example to the README, this looks ok to me.

>Matthew, I am confyused about one thing. Why would autovacuum count updates
>while checking for analyze threshold? Analyze does not change statistics
>right? ( w.r.t line 1072, pg_autovacuum.c). For updating statistics, only
>inserts+deletes should suffice, isn't it?
>
>
An update is the equivelant of an insert and a delete, so it counts
towards the analyze count as much as an insert.

>Other than that, I think autovacuum does everything it can.
>
>
It could be more customizable.

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