What's up with resource.dir and resource.pag in /tmp? - Apache-2.2 related.

So after my successful upgrade to Apache-2.2, I'm seeing these two zero length files in /tmp

-rw-r----- 1 apache apache 0 Sep 23 03:52 resource.dir
-rw-r----- 1 apache apache 0 Sep 23 03:52 resource.pag

Not sure what these are about, and they appear nightly if I delete them. So definitely not related to Apache service restart.

I posted this on the Gentoo forum, but haven't heard anything back. I sure miss the days when you'd get responses almost within minutes of posting.

http://forums.gentoo.org/viewtopic-t-586928-highlight-apache.html

If anyone has some info, let me know. I know it's not bad, but would just like to understand what's going on.

As far as I can tell it's some sort of internal swap file for Apache but there really isn't much info out there. In fact, it's kind of depressing to see a google search turn up only a handful of results!

I'm running Apache/2.2.8 with PHP/5.2.6 (suPHP via cgi-fcgi).

Regards,
Jerret

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