[Bug 1356113] Re: PHP5 session clean cron job causes OOM

[Steve Kamerman]

Thanks, this is looking better now.  Here are some notes:

1. PROC_NAMES should be defined as proc_names or used as PROC_NAMES (inconsistent case)
2. printf "%s:%s:%s\n" "$save_path" "$gc_maxlifetime" has 2 arguments but the definition takes 3, I would simplify it to this:
echo "$save_path:$gc_maxlifetime"
3. If apache2filter is installed, $proc_names will contains "apache2 apache2", which, when passed to pidof, will return all the PIDs twice, so I've uniq'd them by delimiting them with \n and using "sort -u | xargs pidof".
4.  I'm not entirely sure how "cgi" method would work, but I suppose it means the php command is running on the system by itself, so I've used the following bit to discover that pidof requires "php", not "php5" since that is the real name of the process:
php -r 'sleep(60);echo "Done";' &
5. We've been using HHVM for a few years for one of our products, and I could easily add support for that ("hhvm --php -r"...), but things seem a bit out of order there, mainly, the php.ini is in /etc/hhvm instead of /etc/php5/hhvm

I've attached an updated script.

** Attachment added: "sessionclean"
   https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1356113/+attachment/4180769/+files/sessionclean

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Title:
  PHP5 session clean cron job causes OOM

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