(removing developer) On Mon, Oct 15, 2012 at 4:01 PM, Cedric Blancher < [email protected]> wrote:
> On 16 October 2012 00:52, Jason Matthews <[email protected]> wrote: > > > > > > > > I should also mention that over all network performance degrades over > time > > and the only fix I have sound so far is to shut down the zones, destroy > the > > vnics, recreate them, and then reboot the zones. > > > > I do that about every four hours to keep the response times reasonable. > It > > really sucks. > > IMO you blame the wrong people. You can have the same kind of problems > with any Illumos-based distribution if you activate a zone and let the > machine just sit there for a week or so or have a lot filesystem > activity using mmap(). Either way the machines will choke themselves > to memory starvation. The only workaround we found are regular reboots > (every 24h), or limit the ZFS ARC to an absolute minimum. > Is this bare-metal or under a VM? We have many mmap()-based workloads running in production, bare-metal, without issue. The ZFS ARC will reduce its size (reap) when the system is low on memory. If it doesn't, and needs workarounds, that's a bug. It can be diagnosed by checking kstats (arcstats, or using arcstat.pl) and using DTrace. And by choke, you mean the system pages out applications, such that you have a rate of anonymous page-ins? Ie, "vmstat -p 1" and having a rate of "api"? A full "echo ::kmastat | mdb -k" before reboot may show where the memory is or isn't. Brendan -- Brendan Gregg, Joyent http://dtrace.org/blogs/brendan _______________________________________________ OpenIndiana-discuss mailing list [email protected] http://openindiana.org/mailman/listinfo/openindiana-discuss
