Difference between revisions of "Manipulating swap space on a running Solaris system"

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(Adding swap space)
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== Listing swap files in use ==
 
== Listing swap files in use ==
  
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   /dev/md/dsk/d10    85,10    16 8389632 8389632
 
   /dev/md/dsk/d10    85,10    16 8389632 8389632
 
   /export/tempfile      -      16 6291440 6291440
 
   /export/tempfile      -      16 6291440 6291440
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== Delete a swap file ==
 
== Delete a swap file ==
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   swap -d /export/tempfile
 
   swap -d /export/tempfile
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== Adding Swap space to a system with ZFS root pool ==
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So the system you're running is using as ZFS based root pool to boot.  In order to add swap space above what the system was built with you will need to first create a new ZFS pool and then add it to swap:
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1. Create a new ZFS pool
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  zfs create -V 2G rpool/swap2
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2. Add the file associated with the new pool to the running swap space
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  swap -a /dev/zvol/dsk/rpool/swap2
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As per usual it will disappear after a reboot.

Revision as of 02:13, 16 March 2011

Listing swap files in use

The following command will list all active swap files:

  swap -l

with output looking like this:

  swapfile             dev  swaplo blocks   free
  /dev/md/dsk/d10     85,10     16 8389632 8389632


Adding swap space

So you need more swap temporarily. Here's how:

1. Make a file to add to swap

  mkfile 2g /export/tempfile

This will crate a 2Gb file.

2. Add the file to the swap pool

  swap -a /export/tempfile

then check it worked with

  swap -l
  
  swapfile             dev  swaplo blocks   free
  /dev/md/dsk/d10     85,10     16 8389632 8389632
  /export/tempfile      -       16 6291440 6291440


Delete a swap file

Finished with your temporary swap file. Delete it:

 swap -d /export/tempfile


Adding Swap space to a system with ZFS root pool

So the system you're running is using as ZFS based root pool to boot. In order to add swap space above what the system was built with you will need to first create a new ZFS pool and then add it to swap:

1. Create a new ZFS pool

 zfs create -V 2G rpool/swap2

2. Add the file associated with the new pool to the running swap space

 swap -a /dev/zvol/dsk/rpool/swap2

As per usual it will disappear after a reboot.