I have got a cron in PHP that crash without any log into the php_errors on a debian. Most of the time (99% of the time), it's work fine and I have no problem with it. But randomly, it just stop and I have nothing in any log on the server. I have got the issue on 2 different server (with very similar install), always when the load increase.
I installed systemd-coredump on the server because I suspected a segfault into one of php library (the script is complex and make a lot of webservices call) but it didn't log anything on the last crash. Out of memory are well log into the php_errors, so it doesn't seem to be the problem.
What can I do to gather any logs that can give me a hint on what happen and why my pid just stop ?