How to start vhostsmng-find with a lower I/O priority?

Question

• Is there a way to use the ionice command to start the /var/loca/psa/admin/bin/vhostmng-find with a lower IO priority?
• Can I start Plesk Daily Maintenance tasks with a lower I/O priority?
• Can I limit I/O usage for Daily Maintenance tasks?

Answer

Warning: Be advised that the bash script part will be removed automatically during the next Plesk update and will have to be applied again. Also, bear in mind that this solution does reduce the disk I/O load, but it also increases the execution time.

You may use a bash script in combination with ionice in order to lower the I/O that some tasks are using by following these steps:

1. Log into your server via SSH

2. Move /usr/local/psa/admin/bin/vhostmng-find to another location (for example /usr/local/psa/admin/sbin/) and rename it by running this command:

# mv /usr/local/psa/admin/bin/vhostmng-find /usr/local/psa/admin/sbin/real-vhostmng-find

3. Create a new bash script file named /usr/local/psa/admin/bin/vhostmng-find (this one will replace the one that was just moved) by using your favorite command-line text editor.

4. Input the following lines within the newly created file:

Note: You must replace [class] and [level] with the scheduling class and options that you find suitable for your specific situation while referring to the information on this link:

CONFIG_TEXT: #!/bin/sh
ionice -c [class] -n [level] /usr/local/psa/admin/sbin/real-vhostmng-find $@

Note: The purpose of the bash script above is to run the original vhostmng-find file that has now become /usr/local/psa/admin/sbin/real-vhostmng-find with a lower priority via the ionice command

5. Apply the necessary permissions to the newly created file:

# chmod 755 /usr/local/psa/admin/bin/vhostmng-find