Subject: Re: inode cache, dentry cache, buffer heads usage
From: Badari Pulavarty <pbadari@us.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: ext2-devel <ext2-devel@lists.sourceforge.net>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
In-Reply-To: <20050310174751.522c5420.akpm@osdl.org>
References: <1110394558.24286.203.camel@dyn318077bld.beaverton.ibm.com>
	 <20050310174751.522c5420.akpm@osdl.org>
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Date: 14 Mar 2005 13:28:13 -0800
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On Thu, 2005-03-10 at 17:47, Andrew Morton wrote:
> Badari Pulavarty <pbadari@us.ibm.com> wrote:
> >
> > So, why is these slab cache are not getting purged/shrinked even
> >  under memory pressure ? (I have seen lowmem as low as 6MB). What
> >  can I do to keep the machine healthy ?
> 
> Tried increasing /proc/sys/vm/vfs_cache_pressure?  (That might not be in
> 2.6.8 though).
> 
> 

Yep. This helped shrink the slabs, but we end up eating up lots of
the lowmem in Buffers. Is there a way to shrink buffers ?

$ cat /proc/meminfo
MemTotal:     16377076 kB
MemFree:       7495824 kB
Buffers:       1081708 kB
Cached:        4162492 kB
SwapCached:          0 kB
Active:        3660756 kB
Inactive:      4473476 kB
HighTotal:    14548952 kB
HighFree:      7489600 kB
LowTotal:      1828124 kB
LowFree:          6224 kB


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