Change "ufs" to "aufs" - assuming you compiled in aufs. Consider upgrading to Squid-2.7.STABLEx - I did a whole lot of little performance tweaks between 2.6 and 2.7. Learn about oprofile and submit some performance information to help developers. :) Adrian 2009/7/28 jotacekm <minuzzo@xxxxxxxxxxxx>: > > Hello. > Recently we have added a lot more clientes behind a squid proxy, and now cpu > utilizitaion is usually 70-95%. The processor is a intel dual core 2160 @ > 1.80GHz. Users started complaing about the speed on accessing pages, and the > link is fine. > > Here is squidclient mgr:info: > > Squid Object Cache: Version 2.6.STABLE5 > Start Time: Fri, 24 Jul 2009 20:19:16 GMT > Current Time: Mon, 27 Jul 2009 19:09:07 GMT > Connection information for squid: > Number of clients accessing cache: 1561 > Number of HTTP requests received: 8590404 > Number of ICP messages received: 0 > Number of ICP messages sent: 0 > Number of queued ICP replies: 0 > Number of HTCP messages received: 0 > Number of HTCP messages sent: 0 > Request failure ratio: 0.00 > Average HTTP requests per minute since start: 2021.3 > Average ICP messages per minute since start: 0.0 > Select loop called: 122560206 times, 2.081 ms avg > Cache information for squid: > Request Hit Ratios: 5min: 23.0%, 60min: 21.9% > Byte Hit Ratios: 5min: 13.3%, 60min: 14.7% > Request Memory Hit Ratios: 5min: 16.3%, 60min: 17.0% > Request Disk Hit Ratios: 5min: 26.3%, 60min: 29.9% > Storage Swap size: 4609784 KB > Storage Mem size: 65692 KB > Mean Object Size: 15.67 KB > Requests given to unlinkd: 455490 > Median Service Times (seconds) 5 min 60 min: > HTTP Requests (All): 1.24267 1.46131 > Cache Misses: 1.54242 1.81376 > Cache Hits: 0.28853 0.30459 > Near Hits: 1.31166 1.62803 > Not-Modified Replies: 0.23230 0.23230 > DNS Lookups: 0.29097 0.31806 > ICP Queries: 0.00000 0.00000 > Resource usage for squid: > UP Time: 254991.358 seconds > CPU Time: 56029.670 seconds > CPU Usage: 21.97% > CPU Usage, 5 minute avg: 94.38% > CPU Usage, 60 minute avg: 93.36% > Process Data Segment Size via sbrk(): 193008 KB > Maximum Resident Size: 0 KB > Page faults with physical i/o: 70 > Memory usage for squid via mallinfo(): > Total space in arena: 193008 KB > Ordinary blocks: 179871 KB 6058 blks > Small blocks: 0 KB 0 blks > Holding blocks: 1080 KB 2 blks > Free Small blocks: 0 KB > Free Ordinary blocks: 13136 KB > Total in use: 180951 KB 93% > Total free: 13136 KB 7% > Total size: 194088 KB > Memory accounted for: > Total accounted: 111416 KB > memPoolAlloc calls: 973288506 > memPoolFree calls: 972077571 > File descriptor usage for squid: > Maximum number of file descriptors: 4096 > Largest file desc currently in use: 1604 > Number of file desc currently in use: 1308 > Files queued for open: 0 > Available number of file descriptors: 2788 > Reserved number of file descriptors: 100 > Store Disk files open: 30 > IO loop method: epoll > Internal Data Structures: > 300182 StoreEntries > 14733 StoreEntries with MemObjects > 14414 Hot Object Cache Items > 294106 on-disk objects > > And here is part of of squid.conf: > > http_port 3128 > visible_hostname xxx > hierarchy_stoplist cgi-bin ? > acl QUERY urlpath_regex cgi-bin \? > cache deny QUERY > acl apache rep_header Server ^Apache > broken_vary_encoding allow apache > access_log /var/log/squid/access.log squid > cache_store_log none > hosts_file /etc/hosts > > > # > ---------------------------------------------------------------------------------------------------------- > cache_mem 64 MB > cache_dir ufs /var/spool/squid 5000 50 256 > cache_replacement_policy heap LFUDA > maximum_object_size 51200 KB > maximum_object_size_in_memory 64 KB > memory_replacement_policy heap GDSF > logfile_rotate 3 > > > # > ---------------------------------------------------------------------------------------------------------- > refresh_pattern ^ftp: 1440 20% 10080 > refresh_pattern ^gopher: 1440 0% 1440 > refresh_pattern . 0 20% 4320 > acl all src 0.0.0.0/0.0.0.0 > acl manager proto cache_object > acl localhost src 127.0.0.1/255.255.255.255 > acl to_localhost dst 127.0.0.0/8 > > > > max_open_disk_fds 2046 > > # timeouts > connect_timeout 30 seconds > shutdown_lifetime 5 seconds > forward_timeout 2 minutes > pconn_timeout 30 seconds > persistent_request_timeout 1 minute > request_timeout 2 minute > > Is there anything that i can do to lower the cpu utilization, or do i have > to upgrade the hardware? > Thanks. > > > -- > View this message in context: http://www.nabble.com/High-CPU-utilization-tp24686629p24686629.html > Sent from the Squid - Users mailing list archive at Nabble.com. > >
