Hi everyone, Previously, I was using Squid 2.5 Stable 5, which have been upgraded to Squid 2.5 Stable 10 recently. Since then, I noticed that there are many cache lost messages being captured by the router that we are using (Cisco 7507). The load is usually around 40%. Cache lost messages: Jun 10 18:13:11 <router name> 4299: 4w6d: %WCCP-1-CACHELOST: Web Cache <ip> lost Jun 10 18:16:54 <router name> 4301: 4w6d: %WCCP-1-CACHELOST: Web Cache <ip> lost Jun 10 18:20:31 <router name> 4303: 4w6d: %WCCP-1-CACHELOST: Web Cache <ip> lost This is how I perform the upgrade: # cd ~/squid-2.5.STABLE10 # ulimit -HSn 8192 # ./configure --prefix=/etc/squid --sysconfdir=/etc/squid --localstatedir=/var/squid --enable-snmp --enable dl-malloc # make all # make install No configurations have been modified after the upgrade. I hope there is somebody that could help me to solve this problem. Thank you. Server Specs: Redhat Linux 8.0 (2.4.18-14) 2.4 GHz Intel Pentium 4 processor 2 GB memory 140GB U320 SCSI drive dedicated for caching