I've recently migrated a 1.5.8 Wiki to a new machine. In the process, I upgraded to 1.8.2, added memcached, eaccelerator, and squid (in accelerator mode). Software in use: # Gentoo Linux # Apache 2.0.58 # PHP 5.1.6-r4 # Memcached 1.1.12-r2 # eAccelerator 0.9.5 # SQUID 2.6 (STABLE3) # MySQL 5.0.24-r1 (with big-tables max-idx-128) # MediaWiki 1.8.2 I did a lot of testing using LoadRunner (commercial performance test tool from Mercury) with each change/addition of the above. Without question, squid makes an enormous (positive) impact on performance, particularly under load. So, all is well and good with my new site, except... Saving newly created pages and uploading files takes FOREVER when squid is turned on. With no squid, saving a new page takes about 1 second. With squid, saving a new page takes about 105 seconds. I'm sure it's just a squid configuration problem, but I'm a squid newbie and don't know where to look. Below is my squid.conf, created by pasting together options I found on the Web + things that looked important from the man page and default config file. Any help debugging this will be appreciated. # squid.conf http_port 192.168.1.1:80 vhost cache_peer 127.0.0.1 parent 80 0 no-query originserver hierarchy_stoplist cgi-bin ? acl QUERY urlpath_regex cgi-bin \? cache deny QUERY acl apache rep_header Server ^Apache broken_vary_encoding allow apache cache_mem 256 MB maximum_object_size_in_memory 512 KB cache_replacement_policy heap GDSF cache_dir ufs /var/cache/squid 1024 16 256 logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh access_log /var/log/squid/access.log combined cache_log none cache_store_log none emulate_httpd_log on url_rewrite_host_header off request_body_max_size 100 MB refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern . 0 20% 4320 acl all src 0.0.0.0/0.0.0.0 acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl web_ports port 80 http_access allow web_ports http_access allow manager localhost http_access deny manager acl purge method PURGE http_access allow purge localhost http_access deny purge acl UPLOADS url_regex /uploads/./ no_cache deny all UPLOADS http_access deny all cache_mgr squid_cache@stweb mail_program mail append_domain .mydomain.com forwarded_for off coredump_dir /var/cache/squid