The bandwidth was about 120Mbps to each squid box but now even 10Mbps makes 100% cpu usage With 10% of users Average HTTP requests per minute since start: 2355.3 16GB of ram and i3-2100 CPU @ 3.10GHz, 4 cores and NO SMP like before . It seems like an attack to/from our clients to/from internet which makes squid crazy . Also the profiling result attached to end of my first post . -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Squid-cpu-usage-100-from-few-days-ago-tp4678894p4678899.html Sent from the Squid - Users mailing list archive at Nabble.com. _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users