Re: Detected DEAD Sibling and TCP connection failed

1. Set a defined ICP timeout instead of using the automatic procedure.

2. TCP connection failures are a sign of overload. Quite likely your
Linux installation is not tuned properly. 1500/min is quite close to
what the default configuration of Linux is suitable for. See
http://squid.sourceforge.net/hno/linux-lfd.html, and consider enabling
async-io if you haven't already (Squid version 2.2.STABLE5-hno currently
recommended for async-io.)

--
Henrik Nordstrom
Squid hacker
Marlon Pabilona wrote:
> 
> Sir,
> Sir,
> 
>         Currently, we have 3 proxy servers using a Linux OS with PIII 500Mhz.
> Each proxy server is having a sibling type to the other. The server is
> having an average traffic of 1500 HTTP requests per minute. We have here
> the messages of cache.log in proxy2. What is the cause of having
> Detected DEAD Sibling? We also experience TCP connection failed, How do
> we minimize this error? Thanks.
> 
> Aug 10 13:37:50 localhost squid[6666]: Detected DEAD Sibling:
> proxy3.unitednetwork.net/3128/3130
> Aug 10 13:37:50 localhost squid[6666]: Detected DEAD Sibling:
> proxy1.unitednetwork.net/3128/3130
> Aug 10 13:37:50 localhost squid[6666]: Detected REVIVED Sibling:
> proxy3.unitednetwork.net/3128/3130
> Aug 10 13:37:50 localhost squid[6666]: Detected REVIVED Sibling:
> proxy1.unitednetwork.net/3128/3130
> Aug 10 13:38:23 localhost squid[6666]: TCP connection to
> proxy3.unitednetwork.net/3128 failed
> Aug 10 13:38:34 localhost squid[6666]: Detected DEAD Sibling:
> proxy3.unitednetwork.net/3128/3130
> Aug 10 13:38:34 localhost squid[6666]: Detected DEAD Sibling:
> proxy1.unitednetwork.net/3128/3130
> Aug 10 13:38:35 localhost squid[6666]: Detected REVIVED Sibling:
> proxy3.unitednetwork.net/3128/3130
> Aug 10 13:38:35 localhost squid[6666]: Detected REVIVED Sibling:
> proxy1.unitednetwork.net/3128/3130
> 
> --
> ---------------------------------------------------------------------
> Marlon T. Pabilona                             marl@skyinet.net
> Systems Administrator                          PGP-Key ID: 0x4E216337
> ---------------------------------------------------------------------