Hello, I'm lost. L Since 2 weeks, I experience some problems : the site runs very fast, and suddenly runs slow for a couple of seconds (let say 15/20 seconds to load a single page), then back to normal. When the problem occurs, I see this in the Apache access.log (see line with error 408. Apache error for Request time out.): 192.168.75.1 - - [02/Oct/2013:16:05:34 -0400] "GET /sites/mediawiki001/ HTTP/1.1" 301 575 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" 192.168.75.1 - - [02/Oct/2013:16:05:34 -0400] "POST /sites/mediawiki001/index.php?action=ajax HTTP/1.1" 200 430 "http://euswebsrv01/sites/mediawiki001/index.php?title=Topics:Operating_syst ems/Microsoft_Windows_8/Start_Screen" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" 192.168.75.1 - - [02/Oct/2013:16:05:34 -0400] "GET /sites/mediawiki001/index.php?title=Main_Page HTTP/1.1" 200 8279 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" 192.168.75.1 - - [02/Oct/2013:16:05:50 -0400] "-" 408 0 "-" "-" 192.168.75.1 - - [02/Oct/2013:16:05:50 -0400] "-" 408 0 "-" "-" 192.168.75.1 - - [02/Oct/2013:16:05:51 -0400] "-" 408 0 "-" "-" 192.168.75.1 - - [02/Oct/2013:16:05:51 -0400] "-" 408 0 "-" "-" 127.0.0.1 - - [02/Oct/2013:16:05:54 -0400] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" 192.168.75.1 - - [02/Oct/2013:16:07:16 -0400] "GET /sites/mediawiki001/index.php?title=File:Topics:windows-8_1-start-screen.png HTTP/1.1" 200 7294 "http://euswebsrv01/sites/mediawiki001/index.php?title=Topics:Operating_syst ems/Microsoft_Windows_8/Start_Screen" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" 192.168.75.1 - - [02/Oct/2013:16:07:17 -0400] "GET /sites/mediawiki001/img_auth.php/thumb/500/5/5b/windows-8_1-start-screen.png /120px-windows-8_1-start-screen.png HTTP/1.1" 200 13178 "http://euswebsrv01/sites/mediawiki001/index.php?title=File:Topics:windows-8 _1-start-screen.png" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" 192.168.75.1 - - [02/Oct/2013:16:07:17 -0400] "GET /sites/mediawiki001/img_auth.php/500/5/5b/windows-8_1-start-screen.png HTTP/1.1" 200 189786 "http://euswebsrv01/sites/mediawiki001/index.php?title=File:Topics:windows-8 _1-start-screen.png" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" 192.168.75.1 - - [02/Oct/2013:16:07:17 -0400] "GET /sites/mediawiki001/ HTTP/1.1" 301 575 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko" General config: VMware Workstation 10 running on Win7 SP1 x64 Web server: Ubuntu 12.04 Server x64, installed on a VMware machine, with 2 Go of RAM. Apache/2.2.22 (Ubuntu) MySQL 5.5.29 PHP Version 5.3.10-1ubuntu3.7 Mediawiki 1.21.1 APC 3.1.13 No, I haven't change anything in my config since many weeks. I'm the only one who access the site. On the server, I have the following structure: /var/www/index.html (to choose if I want to access Mediawiki site or PHPBB site - see below) /var/www/sites/mediawiki001 (Mediawiki site) /var/www/sites/phpbb001 (PHPBB site) When I access the PHPBB site, all is very rapid. issue occurs only with Mediawiki. I have try to read on the web. but I'm completely lost with this one. still a newbie J You will probably need more info (php.ini ? LocalSettings.php ? extension list ?...) : just tell me. Thanks in advance ! Pierre