On 06/12/2012 05:21 PM, Matt Breitbach wrote: > I saw this _exact_ problem after I bumped ram from 48GB to 192GB. Low > memory pressure seemed to be the cuplrit. Happened usually during storage > vmotions or something like that which effectively nullified the data in the > ARC (sometimes 50GB of data would be purged from the ARC). The system was > so busy that it would drop 10Gbit LACP portchannels from our Nexus 5k stack. > I never got a good solution to this other than to set arc_min_c to something > that was close to what I wanted the system to use - I settled on setting it > at ~160GB. It still dropped the arcsz, but it didn't try to adjust arc_c > and resulted in significantly fewer xcalls.
Hmm, how do I do that? I don't have that kind of symbol in the kernel. I'm running OpenIndiana build 151a. My system indeed runs at low memory pressure, I'm simply running a bunch of writers writing files linearly with data they received IP/UDP multicast sockets. -- Saso _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
