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So I have been trying to go through an issue, where after a certain spike in PHP operation which exceeds in Either IOPS, CPU/RAM threshold - it brings not only the site to a complete stalemate but all PHP Operations goes into Sleep state.

This happens both on Nginx + php-FPM or Apache + PHP-FPM

In certain cases

  1. PHP FPM restart does help
  2. PHP FPM restart does not help and need to manually kill all PHP processes.

I'm aware that this must be due to a load spikes or possibly a pm based configuration going over the limit, but if the load average calms down after a certain state, how can I ensure that there are healing services to make sure that PHP operations do not go down for hours.

If you have faced a predicament like this before, can you please confirm what guards have you applied on your end?

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  • I can honestly say that I have never encountered this. I suggest you take some time to analyze the problem properly and post a bug if you find a significant issue with PHP. What you describe sounds like a deadlock. Commented Apr 17 at 22:27

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