Hi !!! I installed squid on a Debian box, with 1Gb of RAM, 160 Gb of disk and AMD Optreon Dual Core, in transparent mode. I configured a cache of 100Gb on disk with aufs. The squid works fine most of the time, but at some specific moment of the day (for example at 6 am) the TCP transfer duration growth from 5 seconds (this is the average) to 30 seconds aproximately. I think that it's something related with te box, not the squid or the traffic, because this situation occurs for a little period of time, when the traffic is high and sometimes, when the traffic is low too. Do you think If I change de cache_dir method to diskd o coss, I will have better performance? Any Help? Thanks a lot !!! Kind regards. Ramiro