FreeBSD 10.1 Memory Exhaustion

[Christopher Forgeron]

Hello All,

 Any reports on success / issues with the patch?

 I'm reporting a good increase in uptime and stability.

 I have two production machines with heavy load running, and I've made it
almost a month without a crash on one machine. The other had a swap-related
crash that wasn't really a fault/issue of the patch, but even with that one
crash, it's been more stable than a non-patched system.

 I'm curious to everyone else's findings.

On Wed, Jul 15, 2015 at 5:38 PM, Karl Denninger <karl at denninger.net> wrote:

>
> On 7/15/2015 15:20, Willem Jan Withagen wrote:
> > On 15/07/2015 21:43, Mark Felder wrote:
> >>
> >> On Tue, Jul 14, 2015, at 10:10, Sean Chittenden wrote:
> >>> I think the reason this is not seen more often is because people
> >>> frequently
> >>> throw limits on the arc in /boot/loader.conf:
> >>>
> >>> vfs.zfs.arc_min="18G"
> >>> vfs.zfs.arc_max="149G"
> >>>
> >>> ZFS ARC *should* not require those settings, but does currently for
> mixed
> >>> workloads (i.e. databases) in order to be "stable".  By setting fixed
> >>> sizes
> >>> on the ARC, UMA and ARC are much more cooperative in that they have
> their
> >>> own memory regions to manage so this behavior is not seen as often.
> >>>
> >>> To be clear, however, it should not be necessary to set parameters like
> >>> these in /boot/loader.conf in order to obtain consistent operational
> >>> behavior.  I'd be curious to know if someone running 10.2 BETA without
> >>> patches is able to trigger this behavior or not.  There was work done
> >>> that
> >>> reported helped with this between 10.1 and now.  To what extent it
> >>> helped,
> >>> however, I don't have any advice yet.
> >>>
> >> I was about to email "I have 12TB at home and 4GB of RAM with a very
> >> erratic workload and never run into any issues" and then I looked at
> >> /boot/loader.conf and saw vfs.zfs.arc_max="2G"
> >>
> >> Now I'm too scared to turn it off... :-)
> > Same here.
> > Just a leftover of all the advise to limit arc in the past.
> > Just bit the bullit: installed BETA1, killed the settings and rebooted.
> > We'll see what comes of it.
> >
> > --WjW
> If you get bit I have refactored the patch for 10.2-BETA1 to get rid of
> the fudges and i386 linker problem and uploaded it, so if you run into
> trouble try applying that and see if that fixes it.
>
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594
>
> --
> Karl Denninger
> karl at denninger.net <mailto:karl at denninger.net>
> /The Market Ticker/
> /[S/MIME encrypted email preferred]/
>