Re: [squid-users] Squid-2.5STABLE9 CPU usage problem

netcraft wrote:

>hi all:
>
>We use squid to accelerate our dynamic pages(resin/jsp), some pages
>are setting to very short expiry time(2min). and some are one day. It works
>good at the beginning, But I meet a strange problem: when squid start, it use
>about 8% of cpu time. the speed is fast. after 2 or 3 days, the cpu usage
>grows up to 49%, and the speed is slow. since the system is using hyperthread
>feature of cpu, so I think the actual cpu usage is about 99%. below is the
>configuration file and some information.
>
>thanks
>
>squid.conf:
>http_port 80
>acl CACHABLE_PAGES urlpath_regex ^/page1.jsp
>acl CACHABLE_PAGES urlpath_regex ^/page2.jsp
>acl NONE_CACHABLE_PAGES urlpath_regex \.jsp
>no_cache allow CACHABLE_PAGES
>no_cache deny NONE_CACHABLE_PAGES
>maximum_object_size_in_memory 256 KB
>cache_mem 128 MB
>cache_dir diskd /data/squid/var/cache 1024 16 256
>cache_log /data/squid/var/logs/cache.log
>cache_store_log none
>emulate_httpd_log off
>dns_children 5
>redirect_children 20
>auth_param basic children 5
>auth_param basic realm Squid proxy-caching web server
>auth_param basic credentialsttl 2 hours
>refresh_pattern -i \.jpg$ 1440 50% 10080 reload-into-ims
>refresh_pattern -i \.gif$ 1440 50% 10080 reload-into-ims
>refresh_pattern -i \.png$ 1440 50% 10080 reload-into-ims
>refresh_pattern -i \.bmp$ 1440 50% 10080 reload-into-ims
>refresh_pattern -i \.css$ 10 50% 60 reload-into-ims
>refresh_pattern -i \.js$ 10 50% 60 reload-into-ims
>refresh_pattern -i \.htm$ 10 50% 60 reload-into-ims
>refresh_pattern -i \.html$ 10 50% 60 reload-into-ims
>refresh_pattern ^http://host1/page1\.jsp 1440 0% 1440 ignore-reload
>refresh_pattern ^http://host1/ 1440 0% 1440
>ignore-reload
>refresh_pattern ^http://host1/page2\.jsp 2 0% 2
>ignore-reload
>refresh_pattern . 0 0% 0
>...
>some acl
>...
>visible_hostname squid1
>httpd_accel_port 80
>httpd_accel_host host1
>httpd_accel_single_host on
>httpd_accel_with_proxy off
>httpd_accel_uses_host_header on
>coredump_dir /data/squid/var/cache
>client_db off
>half_closed_clients off
>client_persistent_connections off
>server_persistent_connections off
>
>some information:
>client_http.requests = 23.248488/sec
>client_http.hits = 11.862562/sec
>server.all.requests = 11.339263/sec
>page_faults = 0.003333/sec
>select_loops = 246.597295/sec
>select_fds = 214.716036/sec
>
>
>
>
Hi

     I don't know what thing hitting your cache however your post solved
my problem, I added these two tags from your post and my squid cpu load
come down to 99% to 34% :)

client_persistent_connections off
server_persistent_connections off

Thanks and regards
Received on Tue Mar 29 2005 - 04:58:19 MST