[squid-users] Squid performance problem

Dear all,

My squid server :

Intel P3 1G, SDRAM 1G, SCSI HD 36G*2, Intel 100M NIC *2
Debian 3.0 , Linux Kernel 2.4.18

I already modify kernel and sysctl to improve system.

increase filedescriptor to 8192

Also edit sysctl.conf to tune up network

net.core.rmem_max=655350
net.core.wmem_max=655350
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_rmem = 4096 87380 174760
net.ipv4.tcp_wmem = 4096 87380 174760

build squid in optimization
env CFLAGS="-O9 -funroll-loops -ffast-math -march=i686 \
-fomit-frame-pointer \
-finline-functions -fno-exceptions" \
./configure \
--prefix=/squid --enable-cachemgr-hostname --enable-useragent-log \
--enable-dlmalloc --enable-gnuregex --enable-cache-digests \
--enable-err-language=Traditional_Chinese --enable-poll \
--disable-ident-lookups --enable-snmp --enable-kill-parent-hack \
--enable-storeio=diskd,ufs --enable-async-io=40

however, it looks like not has good performance. User also complain that
proxy is slow.
Does any advice ?

Connection information for squid:
 Number of clients accessing cache: 62
 Number of HTTP requests received: 1321
 Number of ICP messages received: 0
 Number of ICP messages sent: 0
 Number of queued ICP replies: 0
 Request failure ratio: 0.00%
 HTTP requests per minute: 269.1
 ICP messages per minute: 0.0
 Select loop called: 64185 times, 4.589 ms avg
Cache information for squid:
 Request Hit Ratios: 5min: 36.4%, 60min: 36.4%
 Byte Hit Ratios: 5min: 34.7%, 60min: 34.7%
 Request Memory Hit Ratios: 5min: 0.0%, 60min: 0.0%
 Request Disk Hit Ratios: 5min: 29.6%, 60min: 29.6%
 Storage Swap size: 37629516 KB
 Storage Mem size: 832 KB
 Mean Object Size: 24.42 KB
 Requests given to unlinkd: 472
Median Service Times (seconds) 5 min 60 min:
 HTTP Requests (All): 0.27332 0.27332
 Cache Misses: 0.49576 0.49576
 Cache Hits: 0.02899 0.02899
 Near Hits: 0.46965 0.46965
 Not-Modified Replies: 0.02451 0.02451
 DNS Lookups: 0.70785 0.70785
 ICP Queries: 0.00000 0.00000
Resource usage for squid:
 UP Time: 294.560 seconds
 CPU Time: 28.200 seconds
 CPU Usage: 9.57%
 CPU Usage, 5 minute avg: 11.29%
 CPU Usage, 60 minute avg: 11.29%
 Maximum Resident Size: 0 KB
 Page faults with physical i/o: 347
Memory usage for squid via mallinfo():
 Total space in arena: 148485 KB
 Ordinary blocks: 148473 KB 25 blks
 Small blocks: 0 KB 0 blks
 Holding blocks: 3392 KB 5 blks
 Free Small blocks: 0 KB
 Free Ordinary blocks: 11 KB
 Total in use: 151865 KB 102%
 Total free: 11 KB 0%
Memory accounted for:
 Total accounted: 115859 KB
 memPoolAlloc calls: 8172087
 memPoolFree calls: 3543962

ps1:

I have almost 200 acl for deny sex webstie.

acl deny_sex dstdom_regex foo.com
Received on Sat Apr 26 2003 - 09:37:09 MDT