Re: [SQU] Squid Performance problems

Notes:

a) CPU usage is quite high

b) You have very little cache. (100MB)

c) There seems to be quite many using the proxy.

d) Your HIT response time is quite high.

The fact that the HIT response time is high may indicate some serious
performance problems. Either low on memory, or your Squid is blocking on
disk-io.

What kind of cache store are you using? (ufs / asyncufs)

--
Henrik Nordstrom
Squid hacker
Mike Richards wrote:
> 
> Folks,
>    Any one got any ideas on what to change to fix squid performance
> problems.
>   I have 3 T1's to Internet, Sun E250 2x250mz cpus running Solaris 2.6....
> 
>  Mike
> >
> > TOP:
> >
> > last pid: 12675;  load averages:  1.88,  1.75,  1.69
> > 10:20:44
> > 43 processes:  40 sleeping, 1 running, 2 on cpu
> > CPU states: 16.4% idle, 54.9% user, 14.1% kernel, 14.5% iowait,  0.0% swap
> > Memory: 256M real, 7808K free, 51M swap in use, 2099M swap free
> >
> >   PID USERNAME THR PRI NICE  SIZE   RES STATE   TIME    CPU COMMAND
> > 20073 root       4   0    0   31M   27M run   119:57 34.68% squid
> >   358 root       4  10    0   24M   20M cpu0  203:23 27.01% squid
> >
> >
> >
> >
> > Generated Mon, 05 Mar 2001 15:14:59 GMT, by
> > cachemgr.cgi/2.3.STABLE4
> >
> >
> >  Squid Object Cache: Version 2.3.STABLE4
> >
> >  Start Time:             Mon, 05 Mar 2001 10:12:29 GMT
> >  Current Time:             Mon, 05 Mar 2001 15:15:02 GMT
> >
> >
> > Connection information for squid:
> >         Number of clients accessing cache:      3064
> >         Number of HTTP requests received:       338573
> >         Number of ICP messages received:        162058
> >         Number of ICP messages sent:    162060
> >         Number of queued ICP replies:   0
> >         Request failure ratio:   0.00%
> >         HTTP requests per minute:       1119.1
> >         ICP messages per minute:        1071.3
> >         Select loop called: 1577670 times, 11.506 ms avg
> > Cache information for squid:
> >         Request Hit Ratios:     5min: 20.8%, 60min: 19.3%
> >         Byte Hit Ratios:        5min: 4.1%, 60min: 5.4%
> >         Storage Swap size:      96730 KB
> >         Storage Mem size:       8156 KB
> >         Storage LRU Expiration Age:       0.01 days
> >         Mean Object Size:       4.95 KB
> >         Requests given to unlinkd:      0
> > Median Service Times (seconds)  5 min    60 min:
> >         HTTP Requests (All):   3.86308  1.71839
> >         Cache Misses:          4.54239  2.13280
> >         Cache Hits:            1.24267  0.49576
> >         Near Hits:             4.07741  2.25116
> >         Not-Modified Replies:  1.05672  0.42149
> >         DNS Lookups:           0.02562  0.02336
> >         ICP Queries:           0.00000  0.00000
> > Resource usage for squid:
> >         UP Time:        18152.853 seconds
> >         CPU Time:       6961.320 seconds
> >         CPU Usage:      38.35%
> >         CPU Usage, 5 minute avg:        70.25%
> >         CPU Usage, 60 minute avg:       71.30%
> >         Maximum Resident Size: 0 KB
> >         Page faults with physical i/o: 25638
> > Memory accounted for:
> >         Total accounted:        13735 KB
> > File descriptor usage for squid:
> >         Maximum number of file descriptors:   4096
> >         Largest file desc currently in use:   1108
> >         Number of file desc currently in use: 1049
> >         Files queued for open:                   0
> >         Available number of file descriptors: 3047
> >         Reserved number of file descriptors:   100
> >         Store Disk files open:                  18
> >
> >
> > --------------------------------------------------------------------------
> -----
> >
> 
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