@Wilson Hernandez: > #!/bin/sh -e > ulimit -HSn 65536 > sleep 1 > /usr/local/squid/sbin/squid Thanks a lot Wilson, that worked like a charm. It successfully increased the number of FDs for Squid to 65536. I'll give you feedback tomorrow, when the proxy will be under heavy usage. If everything goes ok I'll re-enable the disk cache. Any hint on why this problem occurred? There haven't been any major changes in the configuration. Thanks, Leonardo