Re: [squid-users] Strange High CPU usage

thank's for your reply:

i'm monitoring median_select_fds

this morning with 150req/sec

select_loops = 280.262863/sec
select_fds = 1502.051748/sec
average_select_fd_period = 0.000660/fd
median_select_fds = 3.984375

thin evening with 40req/sec

select_loops = 383.217992/sec
select_fds = 457.205789/sec
average_select_fd_period = 0.001830/fd
median_select_fds = 0.000000

Duane Wessels ha scritto:

>>and actually configuration:
>>
>>cache_mem 64 MB
>>cache_swap_low 85
>>cache_swap_high 90
>>maximum_object_size 65536 KB
>>maximum_object_size_in_memory 24 KB
>>cache_replacement_policy heap LFUDA
>>memory_replacement_policy heap GDSF
>>cache_dir diskd /var/cache/spool/0 28000 96 256 Q1=72 Q2=64
>>cache_dir diskd /var/cache/spool/1 28000 96 256 Q1=72 Q2=64
>>cache_dir diskd /var/cache/spool/2 28000 96 256 Q1=72 Q2=64
>>memory_pools_limit 50 MB
>>cache_access_log /var/cache/log/access.log
>>cache_log /var/cache/log/cache.log
>>buffered_logs on
>>
>>Squid sames to work fine, but cpu usage after ~60Req/Sec on each server
>>is always 100%
>>I have tried many changes to squid.conf with no results.
>>
>>
>
>
>Probably the first thing to look at is whether or not the high CPU
>problem comes from select/poll looping very quickly. For example:
>
> % squidclient mgr:5min | grep -i select
> select_loops = 72.180305/sec
> select_fds = 19.528906/sec
> average_select_fd_period = 0.007477/fd
> median_select_fds = 0.000000
>
>I think "median_select_fds" is essentially broken and always returns 0.
>
>I plot the values for my caches, which you can see here:
>http://www.ircache.net/Statistics/Vitals/rrd/cgi/select.day.cgi
>
>You might want to add 'half_closed_clients off' to your config file
>and see if that helps.
>
>Duane W.
>
>
>

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