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Knowledge Base

Setting Up VPS Optimized Mode in Virtuozzo Containers

 
advanced administration guide linuxenhancing performancereducing resources consumption in vps environmentsapachedatabase

In Virtuozzo containers for Linux, the VPS-optimized mode switches off
the InnoDB engine in the MySQL database server, and Apache web server
modules that are not critical for hosting services.

The only disadvantages of using the optimized mode are as follows:

  • Web applications requiring InnoDB will not work.
  • Perl, python and ASP scripts will not work because the required
    Apache modules will be switched off.
  • PHP will be available only through CGI.

To switch Plesk to the VPS-optimized mode in the Virtuozzo
environment:

Install the ppOnyx-vps-optimized EZ template. The template applies
the necessary configuration.

If you need to switch Plesk back to the normal mode of operation,
perform the following steps:

  1. Switch on the InnoDB engine.

    1. Open for editing the file /etc/my.cnf.
    2. Locate the lines containing entries skip-innodb and remove
      them, or comment them out.
    3. Save the file.
    4. Restart MySQL server.
  2. Switch on the required Apache modules.

    • On Debian Linux, use the a2enmod utility to switch on all
      required modules. For example, if you want to switch on the PHP
      module, issue the following command:

      a2enmod php5
      
    • On other distributions of Linux, edit the main Apache
      configuration file, which, in most Linux installations, is located
      in /etc/httpd/conf/.

    1. Open for editing the file /etc/httpd/conf/httpd.conf.
    2. Locate the lines LoadModule <module_name> corresponding to
      the modules that you want to switch on, and uncomment the lines.
    3. Save the file.
    4. Restart Apache.
  3. Switch Plesk back to normal operation mode by issuing the following
    SQL query:

    mysql -uadmin -p`cat /etc/psa/.psa.shadow` psa -e "update misc set val='0' where param='vps_optimized_mode_status';"
    
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