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PHP-FPM script that makes recommendations on max_children

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php-fpmpal

Bash script script that makes recommendations on max_children for each PHP-FPM pool on a server.

  1. What the main script (php-fpmpal.sh) does is:
  • identify all PHP-FPM pools on a server and the average memory usage per process for each pool
  • classify how much of the overall PHP-FPM memory each pool uses (e.g. pool one uses about 60%, pool2 uses 25% and pool3 uses 15%)
  • works out how much memory is available on the server for PHP-FPM to use as a whole
  • works out how much of that available memory should be allocated to each pool
  • works out the max_children setting for each pool based on it's "allocated" memory and the average process size for the pool
  1. Cron job (cron.sh):
  • will catch various PHP-FPM pool stats and keep a set number of copies
  • saves stats to "/var/log/php-fpmpal/" by default
  • to setup cronjob create the file "/etc/cron.d/php-fpmpal-stats-capture" with content:

SHELL=/bin/bash

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

*/10 * * * * root /bin/bash /path/to/cron.sh

  1. Cron job interpreter (interpretcron.sh):
  • can be used to print out various types of reports using stats captured in PHP-FPM cronjob
  • run "./interpretcron.sh --help" to get help on usage:

Usage: interpretcron.sh [OPTION]

Arguments:

-ms For each logfile in /var/log/php-fpmpal show the total memory usage per PHP-FPM pool

-msl [FILENAME] Show the total memory usage per PHP-FPM pool for this logfile

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  • Shell 98.6%
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