The rule-of-thumb is 15MB *per GB of cache size*. Thanks Amos - that's the rule of thumb I was looking for. Somewhere along the way I thought I saw 10MB per GB of Cache but it was vague. I was also given a piece of advice to maybe create multiple directories of no more than 100 GB per. I am guessing that this was to address the 16 256 Question I had in Question 2. *IF* that is the case, would increasing it to 32 256 and having 1 cache directory of 200GB not do the same thing as having 2 100GB caches with each set at 16 256? I ask only to try and better understand what it is that is taking place with the setup. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/cache-dir-size-v-s-available-RAM-tp4661705p4661758.html Sent from the Squid - Users mailing list archive at Nabble.com.