Good Afternoon Everyone I'm running Squid 3.3.5 on 3 multicore systems here, using SMP and 6 workers per server dedicated to their own core. Each one running OS RHEL6 U4 with 2.6.32 kernel. I'm noticing as time goes on, some workers seem to be favoured and doing the majority of the work. I've read the article regarding SMP Scaling here: http://wiki.squid-cache.org/Features/SmpScale However I'm find our workers CPU time is differing quite substantially; Server 1: TIME+ COMMAND 287:01.16 (squid-3) -f /etc/squid/squid.conf 248:36.07 (squid-2) -f /etc/squid/squid.conf 146:04.90 (squid-5) -f /etc/squid/squid.conf 140:59.06 (squid-1) -f /etc/squid/squid.conf 111:24.22 (squid-6) -f /etc/squid/squid.conf 120:41.21 (squid-4) -f /etc/squid/squid.conf Server 2: TIME+ COMMAND 618:05.08 (squid-1) -f /etc/squid/squid.conf 405:59.84 (squid-5) -f /etc/squid/squid.conf 362:29.37 (squid-3) -f /etc/squid/squid.conf 318:56.54 (squid-2) -f /etc/squid/squid.conf 211:11.80 (squid-6) -f /etc/squid/squid.conf 204:48.51 (squid-4) -f /etc/squid/squid.conf Server 3: TIME+ COMMAND 497:21.70 (squid-5) -f /etc/squid/squid.conf 389:32.63 (squid-1) -f /etc/squid/squid.conf 171:31.28 (squid-6) -f /etc/squid/squid.conf 177:15.38 (squid-4) -f /etc/squid/squid.conf 346:28.21 (squid-3) -f /etc/squid/squid.conf 174:05.69 (squid-2) -f /etc/squid/squid.conf I can also see the connections differ massively between the workers: Server 1: (Client and Server side connections) squid-1 145 ESTABLISHED squid-2 547 ESTABLISHED squid-3 929 ESTABLISHED squid-4 118 ESTABLISHED squid-5 298 ESTABLISHED squid-6 276 ESTABLISHED Server 2: (Client and Server side connections) squid-1 899 ESTABLISHED squid-2 215 ESTABLISHED squid-3 311 ESTABLISHED squid-4 96 ESTABLISHED squid-5 516 ESTABLISHED squid-6 70 ESTABLISHED Server 3: (Client and Server side connections) squid-1 517 ESTABLISHED squid-2 96 ESTABLISHED squid-3 366 ESTABLISHED squid-4 83 ESTABLISHED squid-5 1030 ESTABLISHED squid-6 189 ESTABLISHED I'm a little concerned that the more people I migrate to this solution the more the first 1 or 2 workers will become saturated. Do the workers happen to have some form of source or destination persistance for (SSL?) connections or something that might be causing this to occur? And is there anything I can do to improve the distribution between workers? Or have I missed something along the line? Cheers