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.
