All, I executed to following snmpwalk: snmpwalk -v 1 -p3401 -c public localhost .1.3.6.1.4.1.3495.1 And after displaying some output squid restarts. The cache.log shows: 2007/01/11 09:41:04| assertion failed: StatHist.c:195: "D[i] >= 0" 2007/01/11 09:41:09| Starting Squid Cache version 2.6.STABLE4 for i686-pc-linux-gnu... However, it's not 100% reproducable. Thanks, Jason