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APC INFO Monitor

How to Configure APC Cache on Virtual Servers with PHP running under FCGId

…ngs, and possibly lower TTL values to allow cached files to expire and be replaced. In general, you must double apc.shm_size in relation to APC’s highest reported Memory Usage to avoid fragmentation completely. Configuration Suggestion for php.ini in the virtual server’s /home/, add the following configuration: (you may also install memcached, and should install fileinfo […]

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WordPress with W3 Total Cache on Nginx with APC (Virtualmin)

…0; and it works with Nginx. Works best with Alternative PHP Cache to provide opcode and database cache. Setting APC for all caches works easiest with Nginx… setting to file caching introduces URL rewrite errors… See W3TC Settings information below for instructions on how to implement File caching. nginx Compatibility — makes WordPress more compatible […]

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APC INFO Monitor

APC Cache Considerations for Virtual Hosting Environments

APC cache does not work well in a virtual hosting environment unless PHP is running as FCGID, and every individual virtual host has a unique PHP.ini and a unique fcgiwrapper. This is not the case with many virtual hosting environments because the memory and CPU requirements are too great. I suggest using Virtualmin for a […]

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Install phpMyAdmin with SSL on CentOS, Amazon Linux, RedHat (Apache or NginX)

…properly and safely, you should be running SSL on your host. Otherwise, change the ForceSSL line in the config file provided below… Install phpMyAdmin from EPEL repository Uninstall current PMA: yum erase phpMyAdmin Set up EPEL repo: Find the latest epel-release at rpm -Uvh On Amazon Linux, epel-release is al… 4, 0, 0, 0 […]

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Tuning Apache and MySQL for Best Performance in a Shared Virtual Hosting Environment

…Apache’s maxclients. If you are running database caching via APC, you may lower max_connections, because APC will serve the busiest queries directly from cache. Take Time to Get a Realistic Assessment of MySQL Performance If you have a PHP opcode and database caching strategy (such as APC) implemented on your web server and for your […]

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Apache and MySql Performance Tuning for High Traffic WordPress Website on Cpanel

…ing on a dedicated server with 8GB RAM, it was crashing frequently under load. The developer tried implementing APC Alternative PHP Cache and W3 Total Cache, but these measures turned out to be incompatible with some of the custom PHP code and the software architecture of the Cpanel server. Haphazardly implementing randomly suggested “solutions” had […]

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Varnish VCL and Config for WordPress with W3 Total Cache

…ppropriate changes to the port and backend IP settings. Varnish Config (/etc/sysconfig/varnish) # Configuration file for varnish # # /etc/init.d/varnish expects the variable $DAEMON_OPTS to be set from this # shell script fragment. # # # Maximum number of open files (for ulimit -n) NFILES=131072 # # Locked shared memory (for ulimit -l) # Default log […]

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WordPress Fail2Ban RegEx for RedHat, CentOS, Amazon Linux

VacantServer WordPress sites are getting hammered with bad logins and probes. We’ve implemented a plugin to log failed login attempts to syslog, and a Fail2Ban filter for the same. If you run these on RedHat, you’ll need some additional configuration info… here it is: WordPress login failure regex (error_log): ^%(__prefix_line)sAuthentication failure for .* from <HOST>$ […]

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