How to Increase vm.max_map_count on a Plesk for Linux Server

June 24, 2024 / Plesk

Increasing ‘vm.max_map_count’ on a Plesk for Linux server is necessary to support applications that require a higher number of memory map areas than the default limit.

  1. Connect to the Server:
    1. Use SSH to access your server.
    2. If you can’t access SSH, contact your server administrator.
  2. Increase vm.max_map_count:
    1. Run this command to increase the value temporarily:
      sysctl -w vm.max_map_count=655300

      Or use this command:

      echo 655350 > /proc/sys/vm/max_map_count
  3. Make the Change Permanent:
    1. Edit the ‘/etc/sysctl.conf’ file with a text editor.
    2. Add this line:
  4. Apply the Changes:
    1. Run the following command to apply changes immediately:
      sysctl -p

Note: If using container virtualization, apply these steps on the hardware node side.

Additional Information:

  1. The file ‘/etc/sysctl.conf’ controls the maximum number of memory map areas a process can have.
  2. The default value is 65536, but some applications may need more.

In such a manner, you can increase vm.max_map_count on a Plesk for Linux Server.

Running into memory limit issues with WordPress and PHP? Explore our guide on How to Increase Your WordPress and PHP Memory Limit for solutions.

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