I followed the advice found here: http://www.mail-archive.com/squid-users@xxxxxxxxxxxxxxx/msg95078.html Switching to diskd from aufs fixed the crashes for me. I still get WARNING: swapfile header inconsistent with available data messages in the log. They appear within a hour of starting with a clean cache. When I clean the cache I stop squid, rename the cache directory, create a new cache directory, start removing the old cache directory, then run "squid -z" before starting squid. I run the following commands: /etc/init.d/squid stop sleep 5 rm -f /var/squid/core* rm -f /var/squid/swap.state* rm -rf /var/squid/cache.hold mv /var/squid/cache /var/squid/cache.hold rm -rf /var/squid/cache.hold & squid -z /etc/init.d/squid start I'm running on a Red Hat Linux VM. Here is the output of 'uname -rv': 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 Squid Cache: Version 3.4.5-20140514-r13135 configure options: '--with-maxfd=16384' '--enable-storeio=diskd' '--enable-removal-policies=heap' '--enable-delay-pools' '--enable-wccpv2' '--enable-auth-basic=DB NCSA NIS POP3 RADIUS fake getpwnam' '--enable-auth-digest=file' '--with-krb5-config=no' '--disable-auth-ntlm' '--disable-auth-negotiate' '--disable-external-acl-helpers' '--disable-ipv6' --enable-ltdl-convenience Mike Mitchell
