Article ID: 125422, created on May 5, 2015, last review on Jun 17, 2016

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux


The /var/lib/php/session folder containing PHP sessions has a large number of files.

When running /etc/cron.hourly/plesk-php-cleanuper, CPU consumption increases to 100%.

When attempting to find all working PHP session processes, this fails with error

Too many open files.


Internal software issue with ID #PPPM-2316. It was fixed in Plesk 12 microupdate #44.


For Plesk 12 apply the latest Plesk microupdates.

Search Words

Too many open files.


PHP session


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