Squid using almost twice as much memory as was accounted for (according to top(1)): 4243 squid 29 20 0 1325M 1317M kserel 42:39 0.00% squid Is this expected? FreeBSD 6.2-RELEASE-p8 Squid 2.6.16 using kqueue, aufs. Some squid.conf lines: cache_mem 300 MB cache_replacement_policy heap LFUDA cache_dir aufs /cache 50000 128 256 cache_dir aufs /cache2 50000 128 256 Other options have been kept default more or less. Some relevant cachemgr lines: Storage Mem size: 307212 KB Total accounted: 763252 KB Number of clients accessing cache: 794 .