WHMCS Daily Cron Memory Spikes

[Mark Coates]

Hi all,

Not sure if its just me but i have noticed when my daily cron runs daily (8am) there is a huge memory (RAM) spike whilst its being processed and then resumes normal usage.

Is this normal as the memory did not hardly move before?

Im guessing there are new tasks added to the CRON to make this big jump?

I am using the latest version 7.8.1 with fully updated CentOS 7.6 running on PHP 7.2

[WHMCS John]

Hi @Mark Coates,

The most memory intensive activities in the cron job are PDF generation and backup generation.

Do you have backups enabled via Setup > Other > Database Backups?

If you switch backups off for 24 hours, do you see memory usage reduced?

[Mark Coates]

Yes they are enabled and have been since day 1 although i will disable them overnight as WHM makes a backup anyway and see if this makes any difference.

[WHMCS John]

The cPanel backup option can be used to offload the backup process from PHP and to a system task, reducing the time and memory required by the daily automation tasks,

[Mark Coates]

Hi @WHMCS John

Well this is the "morning after" so to say and there was no spike so it must have been the database backup which im shocked about the the database normally hovers around 83mb and when you go though WHMCS to back it up it only takes a few seconds before its completed.

Thanks for the info though.

I also tested generating all total invoices to PDF and this does not really touch my server for this in terms of resources (using 'top' at the command line) so it must have been the DB backup.