Zfs on Details... https://www.deepreflect.net/tags/zfs/ Recent content in Zfs on Details... Hugo en-US Copyright © 2003 - 2026 Leonardo Rizzi Tue, 30 Jun 2026 03:28:29 +0200 Solaris - Add swap to ZFS disk https://www.deepreflect.net/2010/02/11/solaris-add-swap-to-zfs-disk/ Thu, 11 Feb 2010 09:38:47 +0000 http://blog.deepreflect.net/?p=814 <p>I installed Solaris 10 05/09 on a machine and I used whatever the default swap space setting when I built the box. Now I need to increase the swap space and I can&rsquo;t add a swap file, like was possible under UFS.</p> <p>If your swap device is in use, then you might not be able to delete it. Check to see if the swap area is in use. For example:</p> I installed Solaris 10 05/09 on a machine and I used whatever the default swap space setting when I built the box. Now I need to increase the swap space and I can’t add a swap file, like was possible under UFS.

If your swap device is in use, then you might not be able to delete it. Check to see if the swap area is in use. For example:

$ swap -l
swapfile                 dev    swaplo   blocks     free
/dev/zvol/dsk/rpool/swap 182,2         8  4194296  4194296

In the above output, blocks == free, so the swap device is not actually being used.

If the swap area is not is use, remove the swap area. For example:

$ swap -d /dev/zvol/dsk/rpool/swap

Confirm that the swap area is removed.

$ swap -l

No swap devices configured

Resize the swap volume. For example:

$ zfs set volsize=1G rpool/swap

Activate the swap area.

$ swap -a /dev/zvol/dsk/rpool/swap` `$ swap -l
swapfile                 dev    swaplo   blocks     free
/dev/zvol/dsk/rpool/swap 182,2         8  2097144  2097144
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