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Re: High CPU usage problem on Squid 2.6 STABLE9

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Andrew Miehs napisał(a):
Hi Robert,

This box seems to be running something a little MORE than squid - could this be a firewall perhaps?
Yes it is iptables firewall,

The huge number of interrupts then seem ok for this sort of a setup -
How many Megabits/ second are you pushing through this box?!

My connection speed is 45 Mbit max, but real traffic is about 30-35 Mbit including P2P.

Sorry to be a pain - I have more quesions...

Is this box really an Intel box, or does it have Opterons installed? (hostname name = sunfire)
This is Sun SunFire V65x server
http://www.sun.com/servers/entry/v65x/

what does
   mpstat -P ALL 5
output ?

Output with transparent squid traffic enabled:
20:33:05 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:10 all 1,55 0,00 1,00 12,00 1,35 21,95 62,15 8930,94 20:33:10 0 3,79 0,00 1,20 0,60 5,39 87,82 1,20 8930,94 20:33:10 1 2,00 0,00 1,60 10,98 0,00 0,00 85,43 0,00 20:33:10 2 0,00 0,00 0,60 29,54 0,00 0,00 69,86 0,00 20:33:10 3 0,40 0,00 0,80 6,79 0,00 0,00 91,82 0,00

20:33:10 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:15 all 1,00 0,00 1,00 13,20 1,30 22,95 60,55 9004,01 20:33:15 0 2,20 0,00 1,20 1,00 5,21 89,98 0,40 9004,41 20:33:15 1 1,20 0,00 2,00 34,87 0,00 2,00 60,12 0,00 20:33:15 2 0,20 0,00 0,00 6,81 0,00 0,00 92,99 0,00 20:33:15 3 0,40 0,00 0,60 10,22 0,00 0,00 88,98 0,00

20:33:15 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:20 all 1,70 0,00 1,00 5,90 1,80 22,00 67,60 8946,40 20:33:20 0 4,40 0,00 0,60 0,20 7,20 87,20 0,40 8946,20 20:33:20 1 1,40 0,00 1,80 12,40 0,00 0,40 84,00 0,00 20:33:20 2 0,20 0,00 1,40 5,60 0,00 0,20 92,60 0,00 20:33:20 3 0,60 0,00 0,40 5,60 0,00 0,00 93,60 0,00

20:33:20 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:25 all 1,60 0,00 1,05 5,80 1,50 22,00 68,05 8913,60 20:33:25 0 3,80 0,00 1,40 0,00 6,00 87,60 1,20 8913,60 20:33:25 1 2,40 0,00 1,80 9,40 0,00 0,40 86,20 0,00 20:33:25 2 0,20 0,00 0,40 6,80 0,00 0,00 92,60 0,00 20:33:25 3 0,20 0,00 0,60 6,80 0,00 0,20 92,20 0,00

20:33:25 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:30 all 3,45 0,00 0,85 3,30 1,60 19,90 70,90 9180,44 20:33:30 0 12,57 0,00 1,20 0,00 6,39 79,24 0,60 9180,44 20:33:30 1 0,80 0,00 1,20 1,20 0,00 0,00 96,41 0,00 20:33:30 2 0,20 0,00 0,40 0,80 0,00 0,00 98,40 0,00 20:33:30 3 0,20 0,00 0,60 11,38 0,00 0,20 87,43 0,00

20:33:30 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:35 all 4,00 0,00 1,95 8,40 1,65 19,05 64,95 8526,40 20:33:35 0 11,60 0,00 3,20 0,20 6,60 75,80 2,60 8526,20 20:33:35 1 4,00 0,00 2,80 10,60 0,00 0,40 82,40 0,00 20:33:35 2 0,00 0,00 0,80 7,20 0,00 0,00 92,00 0,00 20:33:35 3 0,20 0,00 1,00 15,80 0,00 0,00 83,00 0,00

20:33:35 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:40 all 3,35 0,00 2,10 10,24 1,35 18,84 64,12 8767,80 20:33:40 0 12,40 0,00 3,60 0,20 5,40 75,20 3,20 8768,20 20:33:40 1 0,80 0,00 4,00 35,20 0,00 0,00 59,80 0,00 20:33:40 2 0,20 0,00 0,20 2,00 0,00 0,00 97,40 0,00 20:33:40 3 0,00 0,00 0,60 3,20 0,00 0,00 96,20 0,00

20:33:40 CPU %user %nice %sys %iowait %irq %soft %idle intr/s 20:33:45 all 3,90 0,00 1,55 10,15 1,90 19,60 62,90 8399,60 20:33:45 0 10,40 0,00 2,20 0,80 7,60 76,00 3,00 8399,20 20:33:45 1 4,40 0,00 2,20 16,60 0,00 2,40 74,40 0,00 20:33:45 2 0,40 0,00 0,60 5,20 0,00 0,00 93,80 0,00 20:33:45 3 0,40 0,00 1,00 18,00 0,00 0,00 80,40 0,00

Is the latency on sites in the cache? or 'new' sites?
Hmm i'll see these but eg. openning googll site with squid enabled take 1-3 sec.with squid disabled take max 1 sec
Could this be a DNS issue? Are you running a pair of caching DNS servers on site?
or are they based at an ISP?

I have installed DNScache local server, all dns works ok.
Are you running as a 'transperant' proxy? or have the users entered the proxy details per
hand or per proxy.pak.... ?

transparent with iptabes redirect command from port 80 to port 3128.

I would probably run aufs rather than diskd - but this should not make a real difference..
You have also only configured 3Gs of cache (3x 1G)...
You may want to try disabling the disk cache altogether and see how that works - you need to
compile with -enable-storeio=diskd,aufs,null

cache_dir null ? in squid.conf ?
I would also increase my cache size to perhaps, 2G.. (How much RAM does the machine have?)

2 GB RAM

Sorry that I am not of more help,

Thanks a lot
Cheers

Andrew

Regards
Robert



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