5 Jun
2015
5 Jun
'15
5:40 p.m.
On Fri, Jun 05, 2015 at 12:29:04PM +0200, Markus "Shorty" Uckelmann wrote:
How can I further debug this problem and find out what's the culprit?
It's working as designed.
Linux does not treat various kinds of memory pages differently. If you want a daemon to be fully in core, call mlockall(). Here's one way to do that without changing the daemon's source:
http://superuser.com/questions/196725/how-to-mlock-all-pages-of-a-process-tr...
(I've always only done this with my own code explicitly calling mlock)
If you don't explicitly lock things into memory, file I/O can and will cause idle pages to get pushed out. It happens less often if you manipulate swappines.
-- greg