Out of memory errors can be caused by a number of factors including inadequate memory allocation, memory leaks, and excessive resource usage. To diagnose an Out of Memory Killed error with PHP-FPM, you can try the following steps:
- Check the system logs for any relevant error messages: Check the syslog or dmesg output to see if there are any relevant messages indicating that a process was killed due to memory usage. Look for messages containing the words “Out of Memory” or “Killed”.
- Monitor the memory usage of PHP-FPM: Use tools like top, htop, or ps to monitor the memory usage of the PHP-FPM process. If you notice that memory usage is steadily increasing over time, it could indicate a memory leak in your code.
- Increase the memory limit of PHP-FPM: If you find that PHP-FPM is running out of memory, you can try increasing the memory limit in the PHP-FPM configuration file. Look for the “memory_limit” setting and increase it to a higher value.
- Identify the cause of the excessive memory usage: If increasing the memory limit does not resolve the issue, you may need to investigate the root cause of the excessive memory usage. Check your code for any memory leaks or inefficient use of resources. Use profiling tools like xdebug or blackfire to identify areas of your code that are using excessive memory.
- Optimize your code: Once you have identified the cause of the excessive memory usage, you can work on optimizing your code to reduce memory usage. This could involve refactoring code, optimizing database queries, or using caching to reduce the number of times expensive operations need to be performed.
By following these steps, you should be able to diagnose and resolve Out of Memory Killed errors with PHP-FPM.