Glen Barber wrote: > On Thu, Jul 23, 2015 at 07:44:43PM -0500, Mark Linimon wrote: > >> On Fri, Jul 24, 2015 at 12:43:43AM +0000, Glen Barber wrote: >> >>> Even on amd64, you need to tune the system with less than 4GB RAM. >>> >> The only correct answer to "how much RAM do you need to run ZFS" is >> "always more" AFAICT. >> >> > > There's a bit more to it than that. You *can* successfully run amd64 > ZFS system with certain tunings (vfs.kmem_max IIRC), but you also need > to adjust things like disabling prefetching with less than 4GB RAM > (accessible to the OS). > > So yeah, "more RAM" is always a thing in this playing field. > > Glen > > Actually I'm quite sucessfully running zfs on i386 (in a VM) ... here's the trick (which leads me to suspect ARC handling as the problem) - when I get to 512M of kernel space or less than 1G of RAM available system wide, I export/import the zfs pool... Using this formula I have uptimes of months... I haven't yet tried the 'ARC patch' that was proposed recently...
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