[squid-users] squid becomes very slow during peak hours

Hi there,

I am running squid 2.5 on freebsd 7, and my squid box respond very slow during peak hours. my squid machine have twin dual core processors, 4 ram and following hdds.

Filesystem Size Used Avail Capacity Mounted on
/dev/da0s1a 9.7G 241M 8.7G 3% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/da0s1f 73G 35G 32G 52% /cache1
/dev/da0s1g 73G 2.0G 65G 3% /cache2
/dev/da0s1e 39G 2.5G 33G 7% /usr
/dev/da0s1d 58G 6.4G 47G 12% /var

below are the status and settings i have done. i need further guidance to improve the box.

last pid: 50046; load averages: 1.02, 1.07, 1.02 up

7+20:35:29 15:21:42
26 processes: 2 running, 24 sleeping
CPU states: 25.4% user, 0.0% nice, 1.3% system, 0.8% interrupt, 72.5% idle
Mem: 378M Active, 1327M Inact, 192M Wired, 98M Cache, 112M Buf, 3708K Free
Swap: 4096M Total, 20K Used, 4096M Free

  PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
49819 sbt 1 105 0 360M 351M CPU3 3 92:43 98.14% squid
  487 root 1 96 0 4372K 2052K select 0 57:00 3.47% natd
  646 root 1 96 0 16032K 12192K select 3 54:28 0.00% snmpd
49821 sbt 1 -4 0 3652K 1048K msgrcv 0 0:13 0.00% diskd
49822 sbt 1 -4 0 3652K 1048K msgrcv 0 0:10 0.00% diskd
49864 root 1 96 0 3488K 1536K CPU2 1 0:04 0.00% top
  562 root 1 96 0 3156K 1008K select 0 0:04 0.00% syslogd
  717 root 1 8 0 3184K 1048K nanslp 0 0:02 0.00% cron
49631 x-man 1 96 0 8384K 2792K select 0 0:01 0.00% sshd
49635 root 1 20 0 5476K 2360K pause 0 0:00 0.00% csh
49628 root 1 4 0 8384K 2776K sbwait 1 0:00 0.00% sshd
  710 root 1 96 0 5616K 2172K select 1 0:00 0.00% sshd
49634 x-man 1 8 0 3592K 1300K wait 1 0:00 0.00% su
49820 sbt 1 -8 0 1352K 496K piperd 3 0:00 0.00% unlinkd
49633 x-man 1 8 0 3456K 1280K wait 3 0:00 0.00% sh
  765 root 1 5 0 3156K 872K ttyin 1 0:00 0.00% getty
  766 root 1 5 0 3156K 872K ttyin 2 0:00 0.00% getty
  767 root 1 5 0 3156K 872K ttyin 2 0:00 0.00% getty
  769 root 1 5 0 3156K 872K ttyin 3 0:00 0.00% getty
  771 root 1 5 0 3156K 872K ttyin 1 0:00 0.00% getty
  770 root 1 5 0 3156K 872K ttyin 0 0:00 0.00% getty
  768 root 1 5 0 3156K 872K ttyin 3 0:00 0.00% getty
  772 root 1 5 0 3156K 872K ttyin 1 0:00 0.00% getty
47303 root 1 8 0 8080K 3560K wait 1 0:00 0.00% squid
  426 root 1 96 0 1888K 420K select 0 0:00 0.00% devd
  146 root 1 20 0 1356K 668K pause 0 0:00 0.00% adjkerntz

pxy# iostat
      tty da0 pass0 cpu
 tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
   0 126 12.79 5 0.06 0.00 0 0.00 4 0 1 0 95

pxy# vmstat
 procs memory page disks faults cpu
 r b w avm fre flt re pi po fr sr da0 pa0 in sy cs us sy id
 1 3 0 458044 103268 12 0 0 0 30 5 0 0 273 1721 2553 4 1 95

pxy# netstat -am
1376/1414/2790 mbufs in use (current/cache/total)
1214/1372/2586/25600 mbuf clusters in use (current/cache/total/max)
1214/577 mbuf+clusters out of packet secondary zone in use (current/cache)
147/715/862/12800 4k (page size) jumbo clusters in use (current/cache/total/max)
0/0/0/6400 9k jumbo clusters in use (current/cache/total/max)
0/0/0/3200 16k jumbo clusters in use (current/cache/total/max)
3360K/5957K/9317K bytes allocated to network (current/cache/total)
0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
0/7/6656 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
0 requests for sfbufs delayed
0 requests for I/O initiated by sendfile
0 calls to protocol drain routines

"netstat -an | grep "TIME_WAIT" | more " command 17 scroll pages of crt.

some lines from squid.conf
cache_mem 256 MB
cache_replacement_policy heap LFUDA
memory_replacement_policy heap GDSF

cache_swap_low 80
cache_swap_high 90

cache_dir diskd /cache2 60000 16 256 Q1=72 Q2=64
cache_dir diskd /cache1 60000 16 256 Q1=72 Q2=64

cache_log /var/log/squid25/cache.log
cache_access_log /var/log/squid25/access.log
cache_store_log none

half_closed_clients off
maximum_object_size 1024 KB

pxy# sysctl -a | grep maxproc
kern.maxproc: 6164
kern.maxprocperuid: 5547
kern.ipc.somaxconn: 1024
kern.maxfiles: 12328
kern.maxfilesperproc: 11095
net.inet.ip.portrange.randomtime: 45
net.inet.ip.portrange.randomcps: 10
net.inet.ip.portrange.randomized: 1
net.inet.ip.portrange.reservedlow: 0
net.inet.ip.portrange.reservedhigh: 1023
net.inet.ip.portrange.hilast: 65535
net.inet.ip.portrange.hifirst: 49152
net.inet.ip.portrange.last: 65534
net.inet.ip.portrange.first: 1025
net.inet.ip.portrange.lowlast: 600
net.inet.ip.portrange.lowfirst: 1023

if anyother info required, i shall provide.

Regards,
.Goody.

      
Received on Tue Jun 30 2009 - 12:58:28 MDT