Hi Henrik, thanks for your hints. I increased the ip_local_port_range as suggested. It was 10k to 32k before. But, how can I maintain persistent connections from the front-side Apache to the squid? The setup is as follows: World -> apache2 (using mod_rewrite and mod_proxy) -> squid -> App-Server As far as I understand, the connection from apache2 to squid should be persistent, right? This might be a problem, because Apache's mod_proxy doesn't seem to support persistent connections. If I'm wrong, can anyone give me a clue how to get this working? Regards Stefan Henrik Nordstrom wrote: > fre 2007-02-02 klockan 14:11 +0100 skrev Stefan Bohm: >> Hi all, >> >> yesterday we had some strange problems running our reverse-proxy squid cluster. >> During some high-traffic sports event, squid starts to emit messages >> like: >> >> commBind: Cannot bind socket FD 98 to *:0: (98) Address already in use > > You have run out of free ports, all available ports occupied by > TIME_WAIT sockets. > > Things to look into > > 1. Make sure you internally use persistent connections between Squid and > the web servers. This cuts down on the number of initiated connections/s > considerably. > > 2. Configure the unassigned port range as big as possible in your OS. On > Linux this is set in /proc/sys/net/ipv4/ip_local_port_range. The biggest > possible range is 1024-65535 and can sustain up to at least 500 > connections/s continuous load squid->webservers. > > Regards > Henrik
