A client has given me a Plesk account to install his PHP app in, but the PHP memory limit is only 32M and I'd like to increase it. I tried to find this setting on the admin panel but couldn't :(

4 Answers 4


You may adjust that value via .htaccess file.

php_value memory_limit 64M
  • nice, didn't know this was possible!
    – mdeous
    Mar 16, 2010 at 18:49
  • Unless your Plesk hosting company has disabled .htaccess (some do), it should work just fine. Make a phpinfo(); page in the same directory as the new .htaccess file to see if the change has taken effect.
    – Joe
    Mar 16, 2010 at 20:03
  • As mentioned by Embreau, this doesn't work if Fast-CGI is enabled, but editing the main php.ini works in that case.
    – RomanSt
    Feb 10, 2011 at 16:09

There is no way to update it on the control panel.

What you need to do is to create a file called : vhost.conf

This file must be located in :


Inside this file, add (and change domain.com) :

<Directory /var/www/vhosts/domain.com/httpdocs/>
php_value memory_limit 64M

As root, run the following :

/usr/local/psa/admin/sbin/websrvmng --reconfigure-vhost --vhost-name=domain.com

Restart Apache

Please note that if you use Fast-CGI this won't work, you would need to change it within the main php.ini.

EDIT: Added path to vhost.conf file

  • This is (almost definitely) a shared hosting server. Rashal won't have the access to run that command. I agree however, that your answer would work perfectly.
    – Joe
    Mar 16, 2010 at 20:13
  • Being a shared server, he will have to ask his web hosting company.
    – Embreau
    Mar 16, 2010 at 20:50

I use plesk 10 on my own shared Linux server and this works:

ini_set('memory_limit', '64M');

Makes life easy because you can just do it where a script really should take up lots of RAM. Might need some changes depending on your server but for me it runs out of the box.

  • Just to clarify: This is a PHP statement, and you can just add it to your PHP scripts. Nov 22, 2012 at 15:55

I don't know if your admin panel allows you to access this file, but the usual way to increase PHP memory limit is by changing the memory_limit option in the php.ini file.

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