Date: Tue, 11 Mar 2008 01:30:42 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Thomas Vogt <freebsdlists@bsdunix.ch> Cc: freebsd-fs@FreeBSD.org, current@freebsd.org Subject: Re: vm_thread_new: kstack allocation failed with many ZFS FS and NFSD Message-ID: <47D5D2B2.90202@FreeBSD.org> In-Reply-To: <47D544B1.6070806@bsdunix.ch> References: <47D544B1.6070806@bsdunix.ch>
next in thread | previous in thread | raw e-mail | index | archive | help
Thomas Vogt wrote: > Hi List(s) > > I try to simulate real workload for our environment in my lab. The idea > was to create 10k+ ZFS fs with several thousand files on each fs and > then measure daily workload performance. Maybe 10k fs sounds silly but > if you need individual quota for every user on a system, 5-10k fs are > not unusual for ZFS > > My script to cerate zfs fs > #!/bin/sh > i=0; while [ $i != 10000 ]; do zfs create tank/script$i; i=`expr $i + > 1`; done > > My script stopped after creating ~4850 FS with: > vm_thread_new: kstack allocation failed > vm_thread_new: kstack allocation failed > vm_thread_new: kstack allocation failed > vm_thread_new: kstack allocation failed > vm_thread_new: kstack allocation failed > vm_thread_new: kstack allocation failed Your kernel has run out of memory. If you cannot tune kmem_size further then it cannot handle this many ZFS filesystems. Kris
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?47D5D2B2.90202>