----- Original Message -----
From: "K Pang" <time_breath@xxxxxxxxxxx>
To: <squid-users@xxxxxxxxxxxxxxx>
Sent: Monday, April 17, 2006 11:32 AM
Subject: high response time in the case of high file
descriptor usage
HI all,
we're running squid-2.5.S13 on Linux 2.4.32, and we setted file descriptor
to be 8k. we found that when file descriptor usage exceeds 2k, the
response time will go obviously higher. e.g. response time for hit is 3+
seconds. my questions are:
1) is there any limitation on linux? should file descriptor usage above 2k
cause such long response time?
2) how to optimize the response time when file descriptor usage is high?
pls kindly advise, thanks in advance.
Regards,
Pang
High filedescriptor usage usually means a lot of current clients, which
causes the poll/select loops to use a lot of CPU time. If squid is using
100% CPU while it is running slow, the epoll patch at
http://devel.squid-cache.org/ will help you. You will also need to upgrade
to a 2.6 kernel, or find an epoll patch for a 2.4 kernel in order to use
this patch.
regards
Steven
