Date: Sun, 12 Apr 2020 13:20:22 +0000 (UTC) From: Chris Ross <cross+freebsd@distal.com> To: Eugene Grosbein <eugen@grosbein.net> Cc: freebsd-stable@freebsd.org Subject: Re: ZFS server has gone crazy slow Message-ID: <1B88FA01-D6F5-43BC-9351-9076079DC62D@distal.com> In-Reply-To: <89932f19-6aac-5b45-646a-04ceecaaa19d@grosbein.net> References: <2182C27C-A5D3-41BF-9CE9-7C6883E43074@distal.com> <68328a40-0e3d-f9cf-510b-9cbfd7cb8acd@grosbein.net> <654D00F8-DBEC-49BD-B871-7EB830F49D50@distal.com> <89932f19-6aac-5b45-646a-04ceecaaa19d@grosbein.net>
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> On Apr 12, 2020, at 01:48, Eugene Grosbein <eugen@grosbein.net> wrote: > > There is very simple way to prevent such problem, use: zfs set reservation=1G > for single "root" file system of the pool. > > This way ZFS won't allow applications to fill the pool to the point it starts crawling. > Instead, writing applications would obtain ENOSPC error when pool's free space hits the limit. Done. Thank you for that good advice! In case this system develops the same issue in another year or three and I’ve forgotten this, it will yell at me before getting so logged down. - Chrishelp
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