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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Joe Miller <joe.d.miller@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Auto ANALYZE criteria
Date: Tue, 21 Sep 2010 16:44:20 -0400
Message-ID: <8963.1285101860@sss.pgh.pa.us> (raw)
In-Reply-To: <AANLkTim9VeQUSm8WXVryZkRRvsncWWs+yzK4uOzibGy4@mail.gmail.com>
References: <AANLkTi=W02Lcn63qqxoP9jjQ0CJ8wZfCJkKV7fry7CP=@mail.gmail.com>
	<21216.1285035151@sss.pgh.pa.us>
	<AANLkTim9VeQUSm8WXVryZkRRvsncWWs+yzK4uOzibGy4@mail.gmail.com>

Joe Miller <joe.d.miller@gmail.com> writes:
> I was looking at the autovacuum documentation:
> http://www.postgresql.org/docs/9.0/interactive/routine-vacuuming.html#AUTOVACUUM

>    For analyze, a similar condition is used: the threshold, defined as:
>    analyze threshold = analyze base threshold + analyze scale factor *
> number of tuples
>    is compared to the total number of tuples inserted or updated since
> the last ANALYZE.

> I guess that should be updated to read "insert, updated or deleted".

Mph.  We caught the other places where the docs explain what the analyze
threshold is, but missed that one.  Fixed, thanks for pointing it out.

			regards, tom lane

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