Skip site navigation (1) Skip section navigation (2)

bgwriter_lru_multiplier blurbs inconsistent

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: pgsql-docs(at)postgresql(dot)org
Cc: Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: bgwriter_lru_multiplier blurbs inconsistent
Date: 2008-01-20 19:55:19
Message-ID: 20080120195519.GD22740@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-docspgsql-hackers
Is the bgwriter_lru_multiplier parameter a limit on the number to scan
or to write?  GUC and docs seem to contradict one another.  GUC says

#: utils/misc/guc.c:1834
#, fuzzy
msgid "Background writer multiplier on average buffers to scan per round."

The docs say

         Unless limited by <varname>bgwriter_lru_maxpages</>, the number
         of dirty buffers written in each round is determined by reference
         to the number of new buffers that have been needed by server
         processes during recent rounds.  This number is multiplied by
         <varname>bgwriter_lru_multiplier</> to arrive at the estimate
         of the number of buffers that will be needed during the next round.


Which one is correct?  Do we need a correction of either?

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

Responses

pgsql-docs by date

Next:From: Tom LaneDate: 2008-01-20 20:08:40
Subject: Re: bgwriter_lru_multiplier blurbs inconsistent
Previous:From: Oleg BartunovDate: 2008-01-16 08:00:48
Subject: Re: Full Text Search examples patch

pgsql-hackers by date

Next:From: Tom LaneDate: 2008-01-20 20:08:40
Subject: Re: bgwriter_lru_multiplier blurbs inconsistent
Previous:From: Alvaro HerreraDate: 2008-01-20 19:41:41
Subject: Re: Friendly help for psql

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group