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_at_viaip.com.br>:
>
> 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.
>
>
Received on Tue Jul 28 2009 - 01:50:56 MDT
This archive was generated by hypermail 2.2.0 : Tue Jul 28 2009 - 12:00:05 MDT