[squid-users] Squid Pauses!

Hello Squid Users! I have a TPROXY server built with squid V. 3.3.7, which was compiled from source. The server has 192 GB of RAM and 2 X 2.7 GHz CPUs, each with 12 cores. but I'm running only one squid worker. At the moment, there are 17 squid clients and the server is receiving 20025 http requests per minute. CPU usage is 62%. Squid is consuming about 12 GB of memory at the moment. Traffic is being redirected to this TPROXY using WCCP. Each once in a while, traffic redirection stops for about 5-10 minutes. When checking the WCCP clients on my Cisco switch, I see there is no WCCP client!  During this pause time, running "squidclient mgr:info" freezes endlessly and does not return any results. Checking /var/log/squid/cache.log when this pause happens does not show any strange logs. When this condition happened last time, I shutdown squid using "service squid shutdown" and the init script reported that squid shutdown went well but running "ps aux | grep squid" returned the following: root      6900  0.0  0.0 103244   852 pts/0    S+   12:05   0:00 grep squid root     13006  0.0  0.0  38964   392 ?        Ss   Aug23   0:00 squid -f /etc/squid/squid.conf squid    13009 63.1 25.0 50332228 49622116 ?   Dl   Aug23 3383:07 (squid-1) -f /etc/squid/squid.conf As you see, the worker squid kid is in uninterruptible sleep state and it remained in this state for a while. Even when squid seems to be working properly, the worker process may be in uninterruptible sleep for a short time, is this normal?  Becuase squid worker process stayed in the uninterruptible sleep mode for quite long, I tried to stop it using "squid -k shutdown", which failed with the following: squid: No running copy I'm wondering why this command is claiming "No running copy" while both the parent and kid squid processes are running!  Do you have any idea of what might be going on? Best regards, Firas
Received on Tue Aug 27 2013 - 11:11:42 MDT