How to free PHP-fpm Memory at Server


Often when you are running PHP with any web server (Apache or Nginx), the FastCGI process manager eats up a lot of your RAM, by forking multiple subprocesses for every request, which in turn leads to memory leakage.

To avert this, it is desirable to schedule a shell script and reduce this memory leakage.

Save the below command as “.sh” file and schedule that on cron each day.


FREE=$(free -mt | grep Total | awk ‘{print $4}’)

if [ $FREE -lt 200 ] ;then
echo -e “`date ‘+%b %d %H:%M:%S’` `hostname` MEMUSAGE alert – low free RAM – free mem = $FREE MB” >> /var/log/sysops-sh/free-mem.log
/etc/init.d/php-fpm reload
RETVAL=$(echo $?)
if [ $RETVAL -eq 0 ]; then
FREE2=$(free -mt | grep Total | awk ‘{print $4}’)
echo -e “`date ‘+%b %d %H:%M:%S’` `hostname` PHP-FPM reloaded successfully.Free Mem = $FREE2 MB” >> /var/log/sysops-sh/free-mem.log

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