We had this suggestion recently:

On 04/28/19 18:30, Michal Nowak wrote:
   $ zfs get volsize rpool/swap
   $ pfexec zfs set volsize=24g rpool/swap
   $ pfexec reboot

I have had strange case this morning, when my rpool (SSD 256GB) was occupying 120GB and / partition was 100% full (there are some user directories there, few Zones, log etc).

I saw that rpool/swap "eat" whole 24GB of space I have assigned it earlier... (as dirty fix, I have reduced size of volume to small number, and then rebooted - which has left 20+ GB free!). Right now:

:; zfs list -o compression,compressratio,used,avail,refer,canmount,mountpoint,name -r rpool/ROOT rpool/swap
COMPRESS  RATIO   USED  AVAIL  REFER  CANMOUNT  MOUNTPOINT             NAME
off 1.00x 96,0G 37,8G 19K off legacy rpool/ROOT off 1.00x 8,17G 37,8G 8,17G - - rpool/swap

:; zfs get volsize rpool/swap
NAME        PROPERTY  VALUE    SOURCE
rpool/swap  volsize   24G      local

Is there any better way to free space on rpool/swap volume (before, for example, I start FF)?

Is it safe to enable compression of rpool?

With best regards.
Predrag Zečević
--
Predrag Zečević
Technical Support Analyst
2e Systems GmbH

tel: +49 - 6196 - 95058 - 15
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