lkml.org 
[lkml]   [2001]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.4.9-ac16 good perfomer?
On Fri, 28 Sep 2001, Mike Fedyk wrote:

> Is it normal to have Inact_target 1/4 of main memory (64MB of 256MB RAM)?
> In previous versions, this value would fluctuate with the load of the system.
>
> Is this expected?

Yes, this is a 'compensation' for the fact that page aging changed
from exponential to linear. The combination of linear page aging
with a large inactive_target results in a good combination of
frequency- and recency-based page eviction.

Doing just linear page aging with a small inactive target resulted
in worse throughput than exponential page aging for some workloads,
better for other workloads. Linear page aging with a large inactive
target results in good througput and latency under all workloads I've
found up to now. As usual, thanks go out to Matt Dillon for finding
this balancing point.

I guess it really is time to stop reinventing the wheel ;)

cheers,

Rik
--
IA64: a worthy successor to i860.

http://www.surriel.com/ http://distro.conectiva.com/

Send all your spam to aardvark@nl.linux.org (spam digging piggy)

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.104 / U:6.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site