thanks a lot. and then i found another error occurred: WARNING: unparseable HTTP header field {share memory not exist, need create new share memory!} is there something wrong with cache_dir or cache_mem? total memory of the server is 2G part of squid.conf as the following: cache_mem 512 MB workers 3 cache_dir rock /cache 10240 max-size=32768 if ${process_number}=1 cache_dir aufs /cache1 10240 16 256 min-size=32769 endif if ${process_number}=2 cache_dir aufs /cache2 10240 16 256 min-size=32769 endif if ${process_number}=3 cache_dir aufs /cache3 10240 16 256 min-size=32769 endif -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/the-ctx-errors-in-cache-log-tp4662543p4662552.html Sent from the Squid - Users mailing list archive at Nabble.com.