Присвоил права пользователю www-data
root@skw-srv:~# chown www-data /var/log/mod_perf/
Ввел указанную Вами команду:
root@skw-srv:~# tail -f /var/log/apache2/error.log & apachectl restart
Получил ответ:
[1] 29286
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:41 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:42 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:08:43 2015] [error] (2)No such file or directory: mod_performance: database insert error: unable to open database file
[Thu Jan 22 16:09:02 2015] [warn] module performance_module is already loaded, skipping
[Thu Jan 22 16:09:02 2015] [notice] mod_performance: Deprecated parameter - PerformanceExtended
[Thu Jan 22 16:09:02 2015] [notice] mod_performance: Deprecated parameter - PerformanceMaxThreads
[Thu Jan 22 16:09:02 2015] [notice] mod_performance: Deprecated parameter - PerformanceStackSize
[Thu Jan 22 16:09:02 2015] [warn] The Alias directive in /etc/apache2/vhosts/phpMyAdmin.conf at line 1 will probably never match because it overlaps an earlier Alias.
[Thu Jan 22 16:09:02 2015] [warn] NameVirtualHost *:80 has no VirtualHosts
root@skw-srv:~# [Thu Jan 22 16:09:03 2015] [notice] SIGHUP received. Attempting to restart
[Thu Jan 22 16:09:03 2015] [warn] module performance_module is already loaded, skipping
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: Deprecated parameter - PerformanceExtended
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: Deprecated parameter - PerformanceMaxThreads
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: Deprecated parameter - PerformanceStackSize
[Thu Jan 22 16:09:03 2015] [warn] The Alias directive in /etc/apache2/vhosts/phpMyAdmin.conf at line 1 will probably never match because it overlaps an earlier Alias.
[Thu Jan 22 16:09:03 2015] [warn] NameVirtualHost *:80 has no VirtualHosts
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: version 0.4-7 loaded
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: module enabled :)
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: server started :)
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: use log hook
[Thu Jan 22 16:09:03 2015] [notice] mod_performance: Performance daemon started successfully
[Thu Jan 22 16:09:03 2015] [notice] Apache/2.2.22 (Debian) PHP/5.4.36-0+deb7u3 mod_ssl/2.2.22 OpenSSL/1.0.1e configured -- resuming normal operations
Если все нормально, то я не понимаю как мне посмотреть что же дает нагрузки. Перейдя по ссылке
http://IP-сервера/performance-status мне показывается наш сайт.