git: 80403a756d - main - Update ZFS arc min/max/meta_limit sysctl loader variables

The branch main has been updated by pauamma:

URL: https://cgit.FreeBSD.org/doc/commit/?id=80403a756d2c14769c32b3e999974dc7e3bb8935

commit 80403a756d2c14769c32b3e999974dc7e3bb8935
Author:     Jerry Jacobs <jerry.jacobs0xor-gate.org>
AuthorDate: 2022-11-01 05:39:08 +0000
Commit:     Pau Amma <pauamma@FreeBSD.org>
CommitDate: 2022-11-02 21:36:13 +0000

    Update ZFS arc min/max/meta_limit sysctl loader variables
    
    Pull Request:   https://github.com/freebsd/freebsd-doc/pull/92
    
    Reviewed by:    carlavilla, gjb, pauamma (implicit)
    
    Approved by:    carlavilla (mentor), gjb (mentor)
---
 documentation/content/en/books/handbook/zfs/_index.adoc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/documentation/content/en/books/handbook/zfs/_index.adoc b/documentation/content/en/books/handbook/zfs/_index.adoc
index 5400afa7b5..9720122a84 100644
--- a/documentation/content/en/books/handbook/zfs/_index.adoc
+++ b/documentation/content/en/books/handbook/zfs/_index.adoc
@@ -2619,9 +2619,9 @@ If a user has the `snapshot` permission and the `allow` permission, that user ca
 
 Adjust tunables to make ZFS perform best for different workloads.
 
-* [[zfs-advanced-tuning-arc_max]] `_vfs.zfs.arc_max_` - Upper size of the <<zfs-term-arc,ARC>>. The default is all RAM but 1 GB, or 5/8 of all RAM, whichever is more. Use a lower value if the system runs any other daemons or processes that may require memory. Adjust this value at runtime with man:sysctl[8] and set it in [.filename]#/boot/loader.conf# or [.filename]#/etc/sysctl.conf#.
-* [[zfs-advanced-tuning-arc_meta_limit]] `_vfs.zfs.arc_meta_limit_` - Limit the amount of the <<zfs-term-arc,ARC>> used to store metadata. The default is one fourth of `vfs.zfs.arc_max`. Increasing this value will improve performance if the workload involves operations on a large number of files and directories, or frequent metadata operations, at the cost of less file data fitting in the <<zfs-term-arc,ARC>>. Adjust this value at runtime with man:sysctl[8] in [.filename]#/boot/loader.conf# or [.filename]#/etc/sysctl.conf#.
-* [[zfs-advanced-tuning-arc_min]] `_vfs.zfs.arc_min_` - Lower size of the <<zfs-term-arc,ARC>>. The default is one half of `vfs.zfs.arc_meta_limit`. Adjust this value to prevent other applications from pressuring out the entire <<zfs-term-arc,ARC>>. Adjust this value at runtime with man:sysctl[8] and in [.filename]#/boot/loader.conf# or [.filename]#/etc/sysctl.conf#.
+* [[zfs-advanced-tuning-arc_max]] `_vfs.zfs.arc.max_` starting with 13.x (`_vfs.zfs.arc_max` for 12.x) - Upper size of the <<zfs-term-arc,ARC>>. The default is all RAM but 1 GB, or 5/8 of all RAM, whichever is more. Use a lower value if the system runs any other daemons or processes that may require memory. Adjust this value at runtime with man:sysctl[8] and set it in [.filename]#/boot/loader.conf# or [.filename]#/etc/sysctl.conf#.
+* [[zfs-advanced-tuning-arc_meta_limit]] `_vfs.zfs.arc.meta_limit_` starting with 13.x (`_vfs.zfs.arc_meta_limit` for 12.x)` - Limit the amount of the <<zfs-term-arc,ARC>> used to store metadata. The default is one fourth of `vfs.zfs.arc.max`. Increasing this value will improve performance if the workload involves operations on a large number of files and directories, or frequent metadata operations, at the cost of less file data fitting in the <<zfs-term-arc,ARC>>. Adjust this value at runtime with man:sysctl[8] in [.filename]#/boot/loader.conf# or [.filename]#/etc/sysctl.conf#.
+* [[zfs-advanced-tuning-arc_min]] `_vfs.zfs.arc.min_` starting with 13.x (`_vfs.zfs.arc_min` for 12.x) - Lower size of the <<zfs-term-arc,ARC>>. The default is one half of `vfs.zfs.arc.meta_limit`. Adjust this value to prevent other applications from pressuring out the entire <<zfs-term-arc,ARC>>. Adjust this value at runtime with man:sysctl[8] and in [.filename]#/boot/loader.conf# or [.filename]#/etc/sysctl.conf#.
 * [[zfs-advanced-tuning-vdev-cache-size]] `_vfs.zfs.vdev.cache.size_` - A preallocated amount of memory reserved as a cache for each device in the pool. The total amount of memory used will be this value multiplied by the number of devices. Set this value at boot time and in [.filename]#/boot/loader.conf#.
 * [[zfs-advanced-tuning-min-auto-ashift]] `_vfs.zfs.min_auto_ashift_` - Lower `ashift` (sector size) used automatically at pool creation time. The value is a power of two. The default value of `9` represents `2^9 = 512`, a sector size of 512 bytes. To avoid _write amplification_ and get the best performance, set this value to the largest sector size used by a device in the pool.
 +
@@ -2684,7 +2684,7 @@ A test system with 1 GB of physical memory benefitted from adding these options
 ....
 vm.kmem_size="330M"
 vm.kmem_size_max="330M"
-vfs.zfs.arc_max="40M"
+vfs.zfs.arc.max="40M"
 vfs.zfs.vdev.cache.size="5M"
 ....