Posted May 12, 2011 13:06 UTC (Thu) by alex (subscriber, #1355)
Parent article: Stable pages
I suspect RRD files might trip up on this. You are repeatedly dirtying a page as you step through each write in the round robin database before eventually reaching the next page boundary.
However performance is currently sucky enough that heavy RRD users are already using the caching daemon to ameliorate the effect.