hi pavel , thanks alot for clarification , i think that after reading the article about memory usage , i think that my squid box is not getting the benefit of my rams (48G) i have 3 hardsisk each one im obtainging 90 G for cache dir , cache_dir aufs /cache1 90000 32 256 cache_dir aufs /cache2 90000 32 256 cache_dir aufs /cache3 90000 32 256 so if i calculate ram dissipation for cache_dir it will be about 15 * (90 * 3) = 4050 M from main memory assume *5G* again my total memory is 48 G also i put cache_mem = 1000 which is *1 G * assume another margin with *5 G at most* so , my memory usage is 5+1+5 = 11 G from 48 G *my question is ,* should i increase cache_mem value ???? or increase cache_dir space ???? also , should i find a better performance after that ??? again , my machine is being pumped with 350 M with about 2300 Users. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/question-in-cache-mem-in-squid-3-tp4661365p4661391.html Sent from the Squid - Users mailing list archive at Nabble.com.