WTF! The /etc/cron.d/php5 should be optional and not forced upon you. This has bitten me twice, once at work, and now on my business machines. It isn’t funny, and there is really no need for it. If you are doing it “for the users”, then let the idiots have massive session caches. It is THEIR responsibility to tune the server.
FYI: you can safely delete /etc/cron.d/php5 without any issues. Don’t let stupidity on the part of package maintainers fool you.