Kernel 2.6.9 Doesn't release Buffer and Cached Memory?

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To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx>
Subject: Kernel 2.6.9 Doesn't release Buffer and Cached Memory?
From: Yang Xiao <yxiao2004@xxxxxxxxx>
Date: Fri, 3 Dec 2004 08:43:30 -0500
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Reply-to: Yang Xiao <yxiao2004@xxxxxxxxx>, For users of Fedora Core releases <fedora-list@xxxxxxxxxx>

Hi all
I'm running FC2 with the latest 2.6.9-1.6_FC2smp Kernel, but it seems
that it doesn't release buffer and  cached memory so that memory used
under sar -r shows memory used is always 90% +, is this something new
or a bug?

             total       used       free     shared    buffers     cached
Mem:          1009        977         32          0        222        610
-/+ buffers/cache:        144        865
Swap:         2000          0       2000


Many thanks,

Yang

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