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A scheduled task configured in Plesk fails with error: PHP Fatal error: Allowed memory size of X bytes exhausted (tried to allocate Y bytes)

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Denis Bykov
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Applicable to:

  • Plesk for Linux

Symptoms

  • Scheduled task fails with error:

    PLESK_ERROR: PHP Fatal error: Allowed memory size of X bytes exhausted (tried to allocate Y bytes)

  • A scheduled task is created at Tools & Settings > Scheduled Tasks with Type Run a command. It should run PHP script and has no limits set with memory_limit directives:

    CONFIG_TEXT: /usr/bin/env php "/var/www/vhosts/example.com/httpdocs/index.php" "fc=module&module=patotalsortlist&controller=cron"

Cause

PHP memory limit is exceeded.

Resolution

In case the scheduled task is using the root user identity

  1. Log into Plesk.

  2. Go to Tools & Settings > Scheduled Tasks and select the affected task.

  3. In the Command field, add the directive memory_limit with required value:

    CONFIG_TEXT: /usr/bin/env php "/var/www/vhosts/example.com/httpdocs/index.php" "fc=module&module=patotalsortlist&controller=cron" -d memory_limit=128M

In case the scheduled task is using the domain system user identity

  1. Connect to the server via SSH.

  2. Edit the server-wide PHP configuration file to increase the memory limit, e.g.:

    # grep memory_limit /opt/plesk/php/7.3/etc/php.ini
    memory_limit = 512M

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