Bug 229035

Summary:	ZFS tuning info in handbook is out of date
Product:	Documentation	Reporter:	Shane <FreeBSD>
Component:	Books & Articles	Assignee:	freebsd-doc (Nobody) <doc>
Status:	Closed FIXED
Severity:	Affects Only Me	CC:	allanjude
Priority:	---
Version:	Latest
Hardware:	Any
OS:	Any

Description Shane 2018-06-15 04:33:06 UTC

In 19.6.1 of the handbook it says "vfs.zfs.arc_max...This value can only be adjusted at boot time..."

This tunable has been dynamically adjustable since Jul 2016 which applies to 10.4 and 11.x

base r302714 for stable/10 with stable/11 being available from initial creation.

vfs.zfs.arc_max, vfs.zfs.arc_min and vfs.zfs.arc_meta_limit can now be adjusted with sysctl(8) while vfs.zfs.vdev.cache.size is now the only(?) tunable left to set at boot time.

Comment 1 Allan Jude freebsd_committer

2018-06-15 04:54:22 UTC

I thought I fixed that in January 2017, but it seems I never actually did it. Sorry.

Comment 2 Allan Jude freebsd_committer

2018-06-15 04:54:28 UTC

https://reviews.freebsd.org/D9311

Comment 3 commit-hook freebsd_committer

2018-06-17 01:49:15 UTC

A commit references this bug:

Author: allanjude
Date: Sun Jun 17 01:48:19 UTC 2018
New revision: 51852
URL: https://svnweb.freebsd.org/changeset/doc/51852

Log:
  ZFS Handbook: vfs.zfs.arc_max and arc_min are adjustable at runtime

  This has been the case since FreeBSD 11

  PR:		229035
  Reported by:	cperciva
  Reviewed by:	bcr, wblock (previous version)
  Sponsored by:	Klara Systems
  Differential Revision:	https://reviews.freebsd.org/D9311

Changes:
  head/en_US.ISO8859-1/books/handbook/zfs/chapter.xml