I do not know if it happens to you, but since I upgraded to 4.3, I've been told that the cron task uses more memory than before. lfd send my a warning of "Excessive resource usage" every time the task is executed.

Example:

Time:         Mon May  7 05:29:11 2018 +0200
Account:      myaccount
Resource:     Virtual Memory Size
Exceeded:     929 > 512 (MB)
Executable:   /home/virtfs/mywebsite/opt/cpanel/ea-php70/root/usr/bin/php
Command Line: /opt/cpanel/ea-php70/root/usr/bin/php -d memory_limit=-1 -d max_execution_time=0 /home/mywebsite/public_html/foro/applications/core/interface/task/task.php 71b6dffb6d492f279f71c3e3cef70607
PID:          2484 (Parent PID:2483)
Killed:       No

Are you getting an email every minute? You indicated you get the email every time the cron is ran, but I'm wondering if it may be more likely that you're getting the email every time a specific task gets executed.

It is probable that some tasks consume more memory than others. It is also probable that certain background tasks that are running since the upgrade are consuming more memory than is generally used.

Hello @bfarber

I have a warning every hour. It is hourly task.

For now I have stopped receiving the warnings.

 

Hello @bfarber Warnings returned.

I tested it and the warnings are related with profilesync task. 

I've done some quick testing and I don't see anything out of the ordinary. I would recommend submitting a ticket so we can take a look at why you are seeing the increased memory usage.