Hello, For a few weeks now I've been tuning a squid to my network. I have around 80Mb/s of HTTP traffic going through this server during most of the day. I had a little of every possible trouble I can think of and most of them are solved now after a few more white hair in my head :) Anyway... My only problem right now looks like some sort of disk I/O problem. Consider the following: File descriptor usage for squid: Maximum number of file descriptors: 32768 Largest file desc currently in use: 24143 Number of file desc currently in use: 23257 Files queued for open: 2 Available number of file descriptors: 9509 Reserved number of file descriptors: 100 Store Disk files open: 11399 Squid isn't really slow or anything right now... But the value on the "Store disk files open" apparently never goes down and it is starting to concern me... Is there a way for some of this opened files to be stale, maybe? Should I start to worry about a incoming crash or I just need to recompile the whole thing with more max FDs? Here's a little more info just to show the current load: Squid Object Cache: Version 3.1.0.13-20090807 Start Time: Fri, 21 Aug 2009 21:53:42 GMT Current Time: Sat, 22 Aug 2009 02:10:12 GMT Connection information for squid: Number of clients accessing cache: 1714 Number of HTTP requests received: 6344801 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: 24736.6 Average ICP messages per minute since start: 0.0 Select loop called: 189242493 times, 0.081 ms avg Cache information for squid: Hits as % of all requests: 5min: 31.9%, 60min: 36.2% Hits as % of bytes sent: 5min: 8.1%, 60min: 8.9% Memory hits as % of hit requests: 5min: 27.2%, 60min: 26.7% Disk hits as % of hit requests: 5min: 39.9%, 60min: 37.5% Storage Swap size: 97730572 KB Storage Swap capacity: 95.4% used, 4.6% free Storage Mem size: 4096128 KB Storage Mem capacity: 100.0% used, 1801439850948198.5% free Mean Object Size: 29.26 KB Requests given to unlinkd: 0 Median Service Times (seconds) 5 min 60 min: HTTP Requests (All): 0.16775 0.23230 Cache Misses: 0.23230 0.30459 Cache Hits: 0.00091 0.02190 Near Hits: 0.12106 0.25890 Not-Modified Replies: 0.00000 0.00000 DNS Lookups: 0.00190 0.01153 ICP Queries: 0.00000 0.00000 Resource usage for squid: UP Time: 15389.656 seconds CPU Time: 6403.690 seconds CPU Usage: 41.61% CPU Usage, 5 minute avg: 36.83% CPU Usage, 60 minute avg: 41.76% Process Data Segment Size via sbrk(): 5909608 KB Maximum Resident Size: 0 KB Page faults with physical i/o: 8560 The cache filesystem, after a bit of test, was chosen to be ext2 and squid was compiled like this: ./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --libdir=/usr/lib64 --sysconfdir=/etc/squid --libexecdir=/usr/libexec/squid --localstatedir=/var --datadir=/usr/share/squid --with-logdir=/var/log/squid --with-default-user=squid --enable-removal-policies=lru,heap --enable-external-acl-helpers=ip_user,session,unix_group --enable-useragent-log --disable-cache-digests --with-large-files --with-filedescriptors=32768 --disable-snmp --disable-ssl --disable-icap-client --enable-zph-qos --disable-ipv6 --enable-caps --enable-linux-netfilter --enable-async-io=36 -- Marcelus Trojahn
