public inbox for [email protected]  

help / color / mirror / Atom feed

From: Bruce Momjian <[email protected]>
To: Tom Lane <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: dx k9 <[email protected]>
Subject: Re: [ADMIN] shared_buffers and shmmax
Date: Wed, 17 Dec 2008 09:11:20 -0500 (EST)
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Tom Lane wrote:
> Bruce Momjian <[email protected]> writes:
> > Tom Lane wrote:
> >> * If we do it like this then the left-hand column is really redundant,
> >> not to say wrong because the right-hand formulas depend on more than
> >> the single variable mentioned.  How about something like
> >> 
> >> Table 17-2	PostgreSQL shared memory usage
> >> 
> >> Purpose				Approximate number of bytes required (as of 8.3)
> >> 
> >> Per-connection state		(1800 + 270 * max_locks_per_transaction) * max_connections
> >> Autovacuum worker state		(1800 + 270 * max_locks_per_transaction) * autovacuum_max_workers
> >> Prepared transaction state	...
> >> Shared disk buffers		...
> >> WAL buffers			...
> >> Fixed space requirements	770kB
> 
> > OK, I updated it again:
> 
> > 	http://momjian.us/tmp/pgsql/kernel-resources.html
> 
> > I did change your left column wording because it could be interpreted as
> > something that changes during server execution, e.g. connections.
> 
> [ shrug... ]  I don't find what you did to be an improvement over what
> I suggested, but I don't have time to argue about it.

I decided I didn't like what I did either;  updated version with new
headings and shorter descriptions:

	http://momjian.us/tmp/pgsql/kernel-resources.html

-- 
  Bruce Momjian  <[email protected]>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

view thread (28+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: [ADMIN] shared_buffers and shmmax
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox