How to increase vm.max_map_count on a Plesk for Linux server

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:

      vm.max_map_count=655350

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.

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