i have 1 dedicated server for squid serving about 700 users simultaneous and 80 req/s !! server is dual opteron dual core and 4gb of ram.. this cache_mem is fine ? cache_mem 256 MB or is best decrease ou increase this ? Thanks, AlexandrE -- Sds. Alexandre J. Correa Onda Internet / OPinguim.net http://www.ondainternet.com.br http://www.opinguim.net