Hi, looking at Squid result codes I found: TCP_HIT = object in the cache. TCP_MEM_HIT = object in the cache and in memory. I did not found any "object in the cache and in the disk". What formula is valid: total_hit = TCP_HIT + TCP_MEM_HIT or TCP_HIT = TCP_MEM_HIT + "object in the cache and in the disk" The idea is just to sum'up HITS correctly in RRDtool :) TIA, Jo