From: "Paweł Lasek" <pawel.lasek@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] Swap considered harmful (Sorry)
Date: Fri, 14 Jul 2006 21:40:29 +0200 [thread overview]
Message-ID: <9f3897940607141240k6693746dh3752e66141993e56@mail.gmail.com> (raw)
In-Reply-To: <0e0746b0f30e6eaa7de413ef337c7f16@quanstro.net>
On 7/14/06, quanstro@quanstro.net <quanstro@quanstro.net> wrote:
> it used to be solaris (i don't know if this is still the case) would
> evict pages to swap even when used + cache << phys memory.
> i did quite a bit of performance work on solaris, and found i couldn't
> use more than a fraction of available memory. we moved the same
> applications to aix and got much better performance with the same amount
> of physical memory, as we were memory bound.
IIRC, the performance increase from swap on linux is in IO code, which
used swap as a sort of organized buffer for apps or something like it,
while giving more core to apps. Not sure about this, I'd have to check
archives for that. It was in a discussion about whether prepare swap
when you have such amounts of memory as today :)
> - erik
>
--
Paul Lasek
next prev parent reply other threads:[~2006-07-14 19:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-13 13:52 Brantley Coile
2006-07-13 14:06 ` Charles Forsyth
2006-07-13 16:07 ` Ronald G Minnich
2006-07-13 16:08 ` quanstro
2006-07-14 11:10 ` Paweł Lasek
2006-07-14 11:54 ` quanstro
2006-07-14 19:40 ` Paweł Lasek [this message]
2006-08-07 17:49 ` Lluís Batlle i Rossell
2006-08-07 18:13 ` Sascha Retzki
2006-07-13 16:09 ` Ronald G Minnich
2006-07-13 16:07 ` quanstro
2006-07-13 17:05 ` David Leimbach
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