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Thread: server optimization issue
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04-14-2005, 10:32 PM #1Newbie
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server optimization issue
Hello
I have server (Dual Xeon 3.06, 2G RAM, 2 x 120 GB Hard Drive) and am
curious, if it's configured propertly. Almost all the time, "top" gives me
350% - 390% idle, while "average load" ranges from 1 (night, low loadings)
to 10 (business time, high loadings).
I tried to tune apache and increased number of threads but it didn't help.
What could cause such a big "average load" while CPUs are almost idle and
what system parameters could be optimized?
And, second question, is it ok, that "top" process takes itself 15% of CPU
time.
Below I have listed output of "top". Any thoughs would be very appreciated.
Thanks in advance.
"top" output:
Code:# top 22:04:09 up 13 days, 15:14, 9 users, load average: 0.75, 1.08, 1.36 290 processes: 283 sleeping, 1 running, 3 zombie, 3 stopped CPU states: cpu user nice system irq softirq iowait idle total 8.8% 0.0% 15.6% 0.0% 0.0% 0.0% 374.8% cpu00 1.6% 0.0% 0.8% 0.0% 0.0% 0.0% 97.5% cpu01 3.3% 0.0% 0.8% 0.0% 0.0% 0.0% 95.8% cpu02 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0% cpu03 4.1% 0.0% 14.1% 0.0% 0.0% 0.0% 81.6% Mem: 2068176k av, 1973448k used, 94728k free, 0k shrd, 161820k buff 684396k active, 1125064k inactive Swap: 2096472k av, 86868k used, 2009604k free 1168384k cached PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND 7548 root 17 0 1420 1420 856 R 16.6 0.0 0:00 3 4109 root 16 0 34288 33M 34204 S 6.6 1.6 0:31 0 httpd 30322 root 15 0 1400 1400 496 S 0.8 0.0 0:05 1 exclog 1 root 16 0 396 372 340 S 0.0 0.0 0:27 2 init 2 root RT 0 0 0 0 SW 0.0 0.0 0:00 0 swapper 3 root RT 0 0 0 0 SW 0.0 0.0 0:00 1 swapper 4 root RT 0 0 0 0 SW 0.0 0.0 0:00 2 swapper
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04-28-2005, 08:46 AM #2Newbie
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Can anyone offer me some ideas on this issue? Thanks.
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04-28-2005, 09:07 AM #3Web Hosting Master
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it could be disk I/O your load average isn't just for your CPU.. it is for everything from disk I/O/CPU/RAM/SWAP and such
run a vmstat 1 when you see the load jump.. also what kernel are you running?Blog your life away
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04-28-2005, 09:32 AM #4Junior Guru Wannabe
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can you post your httpd.conf (the configuration part) and your my.cnf .
Carlos Carluccio
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04-30-2005, 12:12 PM #5Newbie
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Thanks for help, need to check "vmstat 1" - very interesting
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04-30-2005, 02:50 PM #6Junior Guru
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Also look at the output from "atop", if you have that installed. If not, install it . It gives you a nice view of cpu/memory consumption and also network and harddrive i/o. Paste the output of a full page here, a page that had at least 8 seconds interval between that and the previous page (so that everything is averaged out a little bit). I think default is 10 seconds though, but not sure.