--- local-zfs.adoc | 36 +----------------------------------- 1 file changed, 1 insertion(+), 35 deletions(-)
diff --git a/local-zfs.adoc b/local-zfs.adoc index c64fb27..bcd02f7 100644 --- a/local-zfs.adoc +++ b/local-zfs.adoc @@ -627,41 +627,7 @@ You *must reboot* to activate these changes. SWAP on ZFS ~~~~~~~~~~~ -Swap-space created on a zvol may generate some troubles, like blocking the -server or generating a high IO load, often seen when starting a Backup -to an external Storage. - -We strongly recommend to use enough memory, so that you normally do not -run into low memory situations. Should you need or want to add swap, it is -preferred to create a partition on a physical disk and use it as a swap device. -You can leave some space free for this purpose in the advanced options of the -installer. Additionally, you can lower the -``swappiness'' value. A good value for servers is 10: - ----- -# sysctl -w vm.swappiness=10 ----- - -To make the swappiness persistent, open `/etc/sysctl.conf` with -an editor of your choice and add the following line: - --------- -vm.swappiness = 10 --------- - -.Linux kernel `swappiness` parameter values -[width="100%",cols="<m,2d",options="header"] -|=========================================================== -| Value | Strategy -| vm.swappiness = 0 | The kernel will swap only to avoid -an 'out of memory' condition -| vm.swappiness = 1 | Minimum amount of swapping without -disabling it entirely. -| vm.swappiness = 10 | This value is sometimes recommended to -improve performance when sufficient memory exists in a system. -| vm.swappiness = 60 | The default value. -| vm.swappiness = 100 | The kernel will swap aggressively. -|=========================================================== +It is strongly recommended to not use a ZFS volume for a swap partition because this could lead to deadlocks freezing thge affected system and other unpredictable behavior. The OpenZFS documentation, which can be viewed https://openzfs.github.io/openzfs-docs/Project%20and%20Community/FAQ.html#using-a-zvol-for-a-swap-device-on-linux[here], warns against using a ZFS volume for a swap partition. [[zfs_encryption]] Encrypted ZFS Datasets -- 2.39.5 _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
