Dear community, I am running squid3 on Linux Debian squeeze.(3.1.6). I encounter a suddenly a high memory usage on my virtual machine don't really know why. Looking at the cacti memory graph is showing a memory jump from 1.5 Gb to 4GB and then ther server started to swap. For information the virtual machine has 4Gb of RAM. Here is the settings of squid.conf : cache_dir ufs /var/spool/squid3 100 16 256 cache_mem 100 MB hierarchy_stoplist cgi-bin ? refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 my squid3 process is using: 81% of my RAM. So arround 3,2Gb of memory. proxy 25889 0.6 81.1 3937744 3299616 ? S Aug02 9:34 (squid) -YC -f /etc/squid3/squid.conf I am currently having arround 50 users using it. I did have a look at the FAQ (http://wiki.squid-cache.org/SquidFaq/SquidMemory#how-much-ram), but I didn't find any tips for my situation in it. Have you got any idea ? How can I troubleshoot this ? Thanks !