From: Andrea Arcangeli <andrea@suse.de>
To: James Pearson <james-p@moving-picture.com>
Cc: Andrew Morton <akpm@osdl.org>,
marcelo.tosatti@cyclades.com, linux-kernel@vger.kernel.org
Subject: Re: Reducing inode cache usage on 2.4?
Date: Tue, 21 Dec 2004 15:39:54 +0100 [thread overview]
Message-ID: <20041221143954.GK2143@dualathlon.random> (raw)
In-Reply-To: <41C82C2A.9060301@moving-picture.com>
On Tue, Dec 21, 2004 at 01:59:06PM +0000, James Pearson wrote:
> I've changed the value of vm_mapped_ratio to 20 - which has a default
> value of 100 - I guess you're talking about vm_cache_scan_ratio?
yes, I was talking about vm_cache_scan_ratio, you can combine the two
sysctl together just fine.
> I've tried changing just vm_cache_scan_ratio to 20, but it doesn't seem
> to make any difference - I though a higher vm_cache_scan_ratio value
> meant less is scanned?
The less pages are scanned, the more likely you won't free enough
pagecache, the more likely you'll shrink dcache/icache.
I see why vm_mapped_ratio makes most of the difference though and
probably it's the easier fix for your problem (though increasing
vm_cache_scan_ratio sure won't make things worse).
next prev parent reply other threads:[~2004-12-21 14:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-17 17:26 James Pearson
2004-12-17 15:12 ` Marcelo Tosatti
2004-12-17 21:52 ` Willy Tarreau
2004-12-18 0:32 ` James Pearson
2004-12-18 1:21 ` Andrew Morton
2004-12-18 11:02 ` Marcelo Tosatti
2004-12-20 13:47 ` James Pearson
2004-12-20 12:46 ` Marcelo Tosatti
2004-12-20 15:10 ` Andrea Arcangeli
2004-12-20 15:06 ` Marcelo Tosatti
2004-12-20 17:54 ` Andrea Arcangeli
2004-12-20 15:43 ` Marcelo Tosatti
2004-12-20 19:20 ` Andrea Arcangeli
2004-12-21 11:33 ` James Pearson
2004-12-21 13:22 ` Andrea Arcangeli
2004-12-21 13:59 ` James Pearson
2004-12-21 14:39 ` Andrea Arcangeli [this message]
2004-12-18 15:02 ` Marcelo Tosatti
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