What garbage collection parameters can I change? I'm not using authentication, so the default auth_param digest nonce_garbage_interval 5 minutes doesn't really apply. I also run with client_db off so the default authenticate_cache_garbage_interval 1 hour doesn't apply either. The lock-up happens randomly across the four servers. I can go several days without a lock-up. I've only seen one lock-up in a night. Over the last two nights I had lock-ups both nights, but on different servers. # squid -v Squid Cache: Version 3.2.11-20130524-r11822 configure options: '--prefix=/opt/squid' '--with-maxfd=16384' '--with-pthreads' '--enable-storeio=aufs' '--enable-removal-policies=heap' '--disable-external-acl-helpers' '--disable-ipv6' --enable-ltdl-convenience Here are the relevant parts of the configuration: acl CIDR_A src 10.0.0.0/8 ident_lookup_access allow CIDR_A http_port 3128 cache_mem 1024 MB memory_replacement_policy heap GDSF cache_replacement_policy heap LFUDA cache_dir aufs /cache/squid 323368 64 253 max-size=5120000000 maximum_object_size 5000000 KB cache_swap_low 95 cache_swap_high 97 cache_store_log none client_idle_pconn_timeout 5 seconds check_hostnames on allow_underscore on dns_defnames on dns_v4_first on ipcache_size 4096 fqdncache_size 8192 client_db off I have about 7,000,000 objects in the cache. During the four hours the CPU rises from 10% to 100%, the number of objects does not change by very much. The cache utilization sits at 95% during the four hours.
