On Mon, 10 May 2010, Steve Polyack wrote:
On 05/10/10 11:55, Mike Andrews wrote:
On 5/5/10 11:19 AM, Freddie Cash wrote:
On Tue, May 4, 2010 at 11:32 PM, Giulio Ferro<au...@zirakzigil.org>
wrote:
Giulio Ferro wrote:
Thanks, I'll try these settings.
I'll keep you posted.
Nope, it's happened again... Now I've tried to rise vm.kmem_size to 6G...
I'm really astounded at how unstable zfs is, it's causing me a lot of
problem.
Why isn't it stated in the handbook that zfs isn't up to production yet?
As with everything related to computers, it all depends on your uses.
Sorry to semi-hijack this, but... I'm also running into frequent "kmem_map
too small" panics on 8-STABLE, such as:
panic: kmem_malloc(131072): kmem_map too small: 2023780352 total allocated
panic: kmem_malloc(131072): kmem_map too small: 2011525120 total allocated
panic: kmem_malloc(114688): kmem_map too small: 1849356288 total allocated
panic: kmem_malloc(114688): kmem_map too small: 1849356288 total allocated
panic: kmem_malloc(114688): kmem_map too small: 1849356288 total allocated
panic: kmem_malloc(131072): kmem_map too small: 2020409344 total allocated
panic: kmem_malloc(536576): kmem_map too small: 2022957056 total allocated
(those are over the course of 3-4 days)
On this specific system, it has 32 GB physical memory and has
vfs.zfs.arc_max="2G" and vm.kmem_size="64G" in /boot/loader.conf. The
latter was added per earlier suggestions on this list, but appears to be
ignored as "sysctl vm.kmem_size" returns about 2 GB (2172452864) anyway.
As Artem stated in another reply, you will need to set vm.kmem_size slightly
under 2x the physical memory. The kernel will default to 2GB if you pass
this limit. 1.5x physical memory size should be sufficient, so try "48G" and
verify that it gets set correctly on the next boot.
OK, I've got vm.kmem_size set a bit lower and it now accepts it. It's
still not clear why this just recently (April?) became necessary to do at
all :)
Meanwhile, I'll see if things get more stable now...
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