On 09/12/10 23:14, karj wrote:
Hello list we have
two squid SERVERS (sibling) running Squid 2.7.STABLE9
Serving almost all our static content
From what I can see squid is performing well considering the amount of
traffic (*)
Our only problem is that we have too many time wait conn..
TIME_WAIT are FD which have been finished with but are in a TCP timeout
in case there are stray packets still somewhere in the network. Somewhat
around 5 minutes IIRC. Sockets (FD) cannot be re-used until there is no
chance of stray packets corrupting the next TCP connection to use them.
63110 TIME_WAIT
12 CLOSE_WAIT
108 CLOSING
372 ESTABLISHED
449 FIN_WAIT1
104 FIN_WAIT2
19 LAST_ACK
7 LISTEN
141 SYN_RECV
Note that we have set the following parameters on squid.conf
half_closed_clients off
server_persistent_connections off
client_persistent_connections off
... forcing Squid to close the FDs and open two new ones for every
request received. To the tune of on avg 11,700 per minute. Take a guess
why your FD are being churned through so fast.
You need to tune TCP carefully to handle the fast socket turnover with a
lower TIME_WAIT delay.
As well as enable persistent connections again, with a shorter than
default pconn timeout. This will allow clients with multiple things to
fetch to only consume a few FD.
Amos
--
Please be using
Current Stable Squid 2.7.STABLE9 or 3.1.9
Beta testers wanted for 3.2.0.3
