Re: [squid-users] Insight into vmstat output?

On Tue, 31 Aug 2004, Mohsin Khan wrote:

MK> I do not think that you should rebuild your kernel.
MK> First tweak your squid.conf and see what results you
MK> get, i will say lower down the squidGuard threads.
MK> helperOpenServers: Starting 25 'squidGuard'

        Thanks for the response, Mohsin.
        Good suggestion, the only problem is when I lower the number of
redirectors Squid complains about their being too few - which is why it's set at
such a high number...

Brett

MK> --- Brett Charbeneau <brett@wrl.org> wrote:
MK>
MK> > Greetings Fellow Squidders,
MK> >
MK> > I have a Squid box running at my main library
MK> > (2.5.STABLE1) and
MK> > I'm trying to get things tuned up on it. It's of the
MK> > RedHat flavor running
MK> > kernel 2.4.20-30.9 with 1 GB of RAM.
MK> > NOW: the kernel needs to be recompiled with HIGHMEM
MK> > enabled so it can
MK> > take full advantage of the RAM (as it only addresses
MK> > 896 MB, now) and my plan is
MK> > to do that tomorrow as well as stick an additional
MK> > 512 MB in it.
MK> > I've got some vmstat info below, and as you'll
MK> > notice the amount of swap
MK> > increases at the beginning of the day and tends to
MK> > hover around 102700 (yes, six
MK> > digits there) - which I understand to be a Bad
MK> > Thing.
MK> > Will a recompile of the kernel with HIGHMEM make a
MK> > difference here or do
MK> > I need to start tweaking cache settings in
MK> > squid.conf?
MK> > Or am I already I/O bound?
MK> > MANY thanks in advance for any help anyone can find
MK> > the time to offer.
MK> >
MK> >
MK> >
MK> >
MK> > [root]# vmstat 5
MK> > procs memory swap
MK> > io system cpu
MK> > r b w swpd free buff cache si so bi
MK> > bo in cs us sy id
MK> > 0 0 1 10380 7364 90524 289184 0 1 20
MK> > 24 145 33 1 1 98
MK> > 0 0 0 10476 7244 90484 289288 0 19 9
MK> > 78 285 114 2 4 94
MK> > 0 0 0 10476 7128 90520 289268 4 0 42
MK> > 22 530 269 5 11 83
MK> > 0 1 0 10588 7264 90620 288872 4 24 52
MK> > 121 461 221 3 8 90
MK> > 0 0 0 10620 7272 90808 288668 6 6 94
MK> > 62 341 169 3 4 92
MK> >
MK> >
MK> > [root]# cat /proc/meminfo
MK> > total: used: free: shared: buffers:
MK> > cached:
MK> > Mem: 924434432 894775296 29659136 0 92082176
MK> > 331661312
MK> > Swap: 205623296 103870464 101752832
MK> > MemTotal: 902768 kB
MK> > MemFree: 28964 kB
MK> > MemShared: 0 kB
MK> > Buffers: 89924 kB
MK> > Cached: 230668 kB
MK> > SwapCached: 93220 kB
MK> > Active: 663912 kB
MK> > ActiveAnon: 460992 kB
MK> > ActiveCache: 202920 kB
MK> > Inact_dirty: 53640 kB
MK> > Inact_laundry: 98576 kB
MK> > Inact_clean: 20504 kB
MK> > Inact_target: 167324 kB
MK> > HighTotal: 0 kB
MK> > HighFree: 0 kB
MK> > LowTotal: 902768 kB
MK> > LowFree: 28964 kB
MK> > SwapTotal: 200804 kB
MK> > SwapFree: 99368 kB
MK> >
MK> >
MK> > From cache.log at Squid startup:
MK> >
MK> > 2004/08/31 05:01:28| Starting Squid Cache version
MK> > 2.5.STABLE1 for
MK> > i386-redhat-linux-gnu...
MK> > 2004/08/31 05:01:28| Process ID 1013
MK> > 2004/08/31 05:01:28| With 1024 file descriptors
MK> > available
MK> > 2004/08/31 05:01:28| DNS Socket created at 0.0.0.0,
MK> > port 32768, FD 5
MK> > 2004/08/31 05:01:28| Adding nameserver
MK> > xxx.xxx.xxx.xxx from /etc/resolv.conf
MK> > 2004/08/31 05:01:28| Adding nameserver
MK> > xxx.xxx.xxx.xxx from /etc/resolv.conf
MK> > 2004/08/31 05:01:28| Adding nameserver
MK> > xxx.xxx.xxx.xxx from /etc/resolv.conf
MK> > 2004/08/31 05:01:28| helperOpenServers: Starting 25
MK> > 'squidGuard' processes
MK> > 2004/08/31 05:01:28| Unlinkd pipe opened on FD 35
MK> > 2004/08/31 05:01:28| Swap maxSize 61440000 KB,
MK> > estimated 4726153 objects
MK> > 2004/08/31 05:01:28| Target number of buckets:
MK> > 236307
MK> > 2004/08/31 05:01:28| Using 262144 Store buckets
MK> > 2004/08/31 05:01:28| Max Mem size: 65536 KB
MK> > 2004/08/31 05:01:28| Max Swap size: 61440000 KB
MK> > 2004/08/31 05:01:28| Rebuilding storage in
MK> > /var/spool/squid (CLEAN)
MK> > 2004/08/31 05:01:28| Using Least Load store dir
MK> > selection
MK> > 2004/08/31 05:01:28| Set Current Directory to
MK> > /var/spool/squid
MK> > 2004/08/31 05:01:28| helperOpenServers: Starting 25
MK> > 'squidGuard' processes
MK> > 2004/08/31 05:01:28| Unlinkd pipe opened on FD 35
MK> > 2004/08/31 05:01:28| Swap maxSize 61440000 KB,
MK> > estimated 4726153 objects
MK> > 2004/08/31 05:01:28| Target number of buckets:
MK> > 236307
MK> > 2004/08/31 05:01:28| Using 262144 Store buckets
MK> > 2004/08/31 05:01:28| Max Mem size: 65536 KB
MK> > 2004/08/31 05:01:28| Max Swap size: 61440000 KB
MK> > 2004/08/31 05:01:28| Rebuilding storage in
MK> > /var/spool/squid (CLEAN)
MK> > 2004/08/31 05:01:28| Using Least Load store dir
MK> > selection
MK> > 2004/08/31 05:01:28| Set Current Directory to
MK> > /var/spool/squid
MK> > 2004/08/31 05:01:28| Loaded Icons.
MK> > 2004/08/31 05:01:29| Accepting HTTP connections at
MK> > 0.0.0.0, port 3128, FD 37.
MK> > 2004/08/31 05:01:29| Accepting ICP messages at
MK> > 0.0.0.0, port 3130, FD 38.
MK> > 2004/08/31 05:01:29| WCCP Disabled.
MK> > 2004/08/31 05:01:29| Ready to serve requests.
MK> >
MK> > --
MK> >
MK> > Brett Charbeneau, Network Administrator Tel:
MK> > 757-259-7750
MK> > Williamsburg Regional Library FAX:
MK> > 757-259-7798
MK> > 7770 Croaker Road
MK> > brett _at_ wrl.org
MK> > Williamsburg, VA 23188-7064
MK> > http://www.wrl.org
MK> >
MK> >
MK> >
MK> >
MK>
MK>
MK> =====
MK> Regards,
MK> Mohsin Khan
MK> CCNA ( Cisco Certified Network Associate 2.0 )
MK> http://forum.aaghaz.net
MK>
MK> >>>Happy is the one who can smile<<<
MK>
MK>
MK>
MK>
MK>
MK>
MK>
MK>
MK>
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