Hard Drive Partitioning for Plesk

By default, Plesk for Linux stores user data in the /var directory. To achieve optimal result, we recommend partitioning the server hard disk as follows:

Partition Recommended Size


Refer to the OS vendor recommendation (usually at least the amount of RAM on the server times two).


20GB minimum, 50GB recommended. This partition will be used for the OS and Plesk updates.


At least 3GB recommended.


The rest of the unallocated disk space. This partition will hold all Plesk domains, mail, backups, and databases.

Pay attention to the following directories - they may hold large amounts of data:

  • /var/www/vhosts - hosted domains content.
  • /var/qmail - mail configuration and content.
  • /var/lib/mysql - MySQL databases.
  • /var/lib/psa/dumps - Plesk client/domain backups.
  • /var/lib/pgsql/data - PostgreSQL databases.
  • /var/tomcat* - Tomcat applications.
  • /var/lib/mailman - Mailman lists.
  • /usr/local/psa/tmp/ and /usr/local/psa/PMM/tmp/ - temporary files created during the backup process.

These directories can be changed by editing the /etc/psa/psa.conf file (for example, if you want to change the location of the directory in which the website data is stored).