Why is Garbage Collection Disabled in PHP INI?

consultant

• August 06, 2024 01:35

My server's tmp folder was filling up with PHP session files.  I know Cpanel has a cron event to clean up PHP session files but this wasn't cleaning this particular PHP installation.

I checked the ini file and session.gc_probability=0 and session.gc_divisor=0 were set and the comments in the ini file send session.gc_probability=1 is the default and session.gc_probability=100 is the default. 

Is Cpanel using these =0 settings on purpose and for a reason or did me (or another admin) change it a long time ago and not remember and it's just been carried from server to server when migrating config files?

 

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  cPRex Jurassic Moderator

  • August 06, 2024 13:30

  Hey there!  I checked a clean cPanel system and I see the defaults you mentioned on my machine, so I think your guess of "it was changed at some point in the past" is the most likely answer.

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  quietFinn

  • August 06, 2024 13:51

  session.gc_probability=0 and session.gc_divisor=0 in all servers I checked.

  I never touched those settings.

  You can do:
  grep "session.gc_probability" /opt/cpanel/ea-*/root/etc/*.ini | grep -v ";"
  and 
  grep "session.gc_divisor" /opt/cpanel/ea-*/root/etc/*.ini | grep -v ";"

  If you look in /usr/local/cpanel/scripts/clean_user_php_sessions you see:
  "We only remove files with session.save_path that contain /sess_.*/ by default."

   

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