From: liz <liz@unixgrrl.net>
Subject: Re: Memory usage
Date: Tue, 10 May 2005 20:07:52 -0700
Message-ID: <42817708.6030607@unixgrrl.net>
References: <20050506161018.GA3979@infradead.org> <1115410171.1960.26.camel@lade.trondhjem.org> <20050510122745.GA28981@infradead.org> <42816FA8.5000606@unixgrrl.net> <42817444.1040707@catfeeder.net>
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To: Sean Dogar <sean@catfeeder.net>, nfs@lists.sourceforge.net
In-Reply-To: <42817444.1040707@catfeeder.net>
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NFS server.

We have a box running as a NFS server and a mysql server. What were
running into is that we have a large amount of memory being sucked up
by cache and the box is swapping like crazy. It doesnt seem to be
release the cache back so im stumped. The only thing using memory is
mysql.

All we can think of is the NFS server is using kernel cache for
caching (a reach i know)


|~        total:    used:    free:  shared: buffers:  cached:
|Mem:  4224462848 4206002176 18460672        0 41304064 2938032128
|Swap: 2146754560 1073373184 1073381376
|MemTotal:      4125452 kB
|MemFree:         18028 kB
|MemShared:           0 kB
|Buffers:         40336 kB
|Cached:        2095616 kB                        <---- 2G disk cache
|SwapCached:     773556 kB
|Active:        3186300 kB
|ActiveAnon:    1707252 kB
|ActiveCache:   1479048 kB
|Inact_dirty:    607944 kB
|Inact_laundry:  117300 kB
|Inact_clean:     65180 kB
|Inact_target:   795344 kB
|HighTotal:     3276224 kB
|HighFree:         1200 kB
|LowTotal:       849228 kB
|LowFree:         16828 kB
|SwapTotal:     2096440 kB                      <-- 1G swap usage
|SwapFree:      1048224 kB
|HugePages_Total:     0
|HugePages_Free:      0
|Hugepagesize:     2048 kB


If it is indeed NFS is there a way to make it not do that :P I looked
in my o'reilly book, googled and posted to kernel dev (WIth my
asbestos jacket on and zipped up ;)

The machine is running 2.4.21 EL-SMP

Im completely stumped...

Thanks for looking at it :)

Liz

|> How does NFS handle caching? more particularly is there a way to limit
|> the memory usage for caching?
|>
|>
|> Does it show up as kernel cache or is it displayed in the process
|> list?
|>
| Liz,
|
| Are you referring to a nfs server or client?
|
| -Sean
|

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