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

Re: How much ram is too much

From: Dave Cramer <pg(at)fastcrypt(dot)com>
To: postgresql performance list <pgsql-performance(at)postgresql(dot)org>
Subject: Re: How much ram is too much
Date: 2007-06-11 17:59:08
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Hi Andrew
On 11-Jun-07, at 11:34 AM, Andrew Sullivan wrote:

> On Mon, Jun 11, 2007 at 11:09:42AM -0400, Dave Cramer wrote:
>>> and set them to anything remotely close to 128GB.
>> Well, we'd give 25% of it to postgres, and the rest to the OS.
> Are you quite sure that PostgreSQL's management of the buffers is
> efficient with such a large one?

No, I'm not sure of this.
> In the past, that wasn't the case
> for relatively small buffers; with the replacement of single-pass
> LRU, that has certainly changed, but I'd be surprised if anyone
> tested a buffer as large as 32G.

So does anyone have experience above 32G ?

> A
> -- Andrew Sullivan  | ajs(at)crankycanuck(dot)ca
> The whole tendency of modern prose is away from concreteness.
> 		--George Orwell
> ---------------------------(end of  
> broadcast)---------------------------
> TIP 7: You can help support the PostgreSQL project by donating at

In response to

pgsql-performance by date

Next:From: Craig JamesDate: 2007-06-11 18:26:55
Subject: Re: test / live environment, major performance difference
Previous:From: Heikki LinnakangasDate: 2007-06-11 17:51:43
Subject: Re: Variable (degrading) performance

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group