[squid-users] Help tuning squid

Hi,

I believe I have some performance issues here using Squid.
The swap area is being used a lot (590 MB).
Almost the whole memory (2 GB) is being used, and the Process Size (via squidclient) is 427710 KB.
CPU is being heavly used - 80% (squidclient).
I use Trendmicro IWSS as default parent.
Here are some data:
Output (part of) of top

 14:45:07 up 6 days, 1:30, 1 user, load average: 4.01, 3.83, 3.87
573 processes: 569 sleeping, 4 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
           total 58.3% 0.0% 28.3% 0.7% 2.9% 3.6% 5.8%
           cpu00 57.2% 0.0% 25.8% 1.5% 4.9% 4.5% 5.8%
           cpu01 59.5% 0.0% 30.8% 0.0% 0.9% 2.7% 5.8%
Mem: 2061660k av, 2042204k used, 19456k free, 0k shrd, 39248k buff
                   1063336k actv, 129836k in_d, 30388k in_c
Swap: 5120376k av, 594344k used, 4526032k free 453808k cached

  PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
10986 nobody 25 0 424M 417M 2340 R 40.1 20.7 1055m 0 squid
 1625 root 15 0 9052 8620 8016 S 2.0 0.4 127:36 1 winbindd
 1627 root 15 0 10296 9.9M 9696 S 0.9 0.4 54:48 1 winbindd
 2042 iscan 15 0 9976 9976 9284 D 0.8 0.4 21:41 1 postmaster
11373 nobody 15 0 708 676 640 D 0.7 0.0 14:12 1 diskd
--------------------------------------------------------------------------------------

Data from squidclient:

PROCESS SIZE
        Process Data Segment Size via sbrk(): 427710 KB
        Maximum Resident Size: 0 KB
        Total space in arena: 427710 KB

PAGE FAULT RATE
        Page faults with physical i/o: 14793
        5min: page_faults = 0.009999/sec
        60 min: page_faults = 0.035832/sec

HTTP REQUESTS
        Number of HTTP requests received: 7448700
        Average HTTP requests per minute since start: 1766.5
        5min: client_http.requests = 139.435024/sec
        60min: client_http.requests = 109.345998/sec

HTTP SERVICE TIME
        client_http.all_median_svc_time = 0.047755 seconds

DNS SERVICE TIME
        dns.median_svc_time = 0.170482 seconds

OPEN FILE DESCRIPTORS
        Number of file desc currently in use: 2145

CPU
        5 min cpu_usage = 68.974431%
        60 min cpu_usage = 81.409616%
-------------------------------------------------------------------------------------
Squid.conf (some performance related stuff)

maximum_object_size 10240 KB
maximum_object_size_in_memory 20 KB
ipcache_size 10000
fqdncache_size 10000
negative_dns_ttl 15 seconds
cache_mem 256 MB
cache_peer 127.0.0.1 parent 8088 7 no-query default
-------------------------------------------------------------------------------------
I don't have Squidguard nor Dansguardian, only Trendmicro IWSS as mentioned, so all the acls's and handled by Squid itself.
Is there anything I can do to improve the overall performance?
Thanks in advance,

Carlos Eduardo.

Carlos Eduardo Gomes Marins.
Analista de Seguran�a em TI.
Cast Inform�tica S/A.
Tel.: +55 (61) 3414.3607
carlos.suporte.deinf@bcb.gov.br
Received on Mon Feb 13 2006 - 09:58:00 MST