Am Di, 6.10.2015, 16:50 schrieb Darrick J. Wong: > On Tue, Oct 06, 2015 at 04:24:43PM +0200, krautus@xxxxxxxxx wrote: >> [...] >> So I'm asking you: >> 1. is there a way to force dentries and inodes to stay in ram ? >> 2. can I perhaps move dentries and inodes to a dedicated SSD ? >> >> I'm open to all possibilities, perhaps increase RAM ? >> Upgrade to Debian Jessie and 64 bit ? > > ISTR that kernel data such as slabs cannot live in highmem, which means > that > dentries and slab cannot live in highmem. A 32bit kernel sets up ~900M of > low > memory and ~15G of highmem, which is probably why the kernel has to evict > things and why you see such problems. > > A 64bit kernel sets up all the memory as lowmem, so the kernel can use all > the > memory for stuff like that. I'd give that a try first. A few years back, we solved pretty much that exact same problem by switching the kernel to amd64, with all of userspace remaining i386. You should definitely try this. -- Mit freundlichen Grüßen Johannes Truschnigg Senior System Administrator -- mailto:johannes.truschnigg@xxxxxxxxxxx (in dringenden Fällen bitte an info@xxxxxxxxxxx) Geizhals(R) - Preisvergleich Internet Services AG Obere Donaustrasse 63/2 A-1020 Wien Tel: +43 1 5811609/87 Fax: +43 1 5811609/55 http://geizhals.at => Preisvergleich für Österreich http://geizhals.de => Preisvergleich für Deutschland http://geizhals.eu => Preisvergleich EU-weit Handelsgericht Wien | FN 197241K | Firmensitz Wien _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
