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System Administration Guide: Devices and File Systems     Oracle Solaris 11 Express 11/10
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Document Information


1.  Managing Removable Media (Overview)

2.  Managing Removable Media (Tasks)

3.  Accessing Removable Media (Tasks)

4.  Writing CDs and DVDs (Tasks)

5.  Managing Devices (Overview/Tasks)

6.  Dynamically Configuring Devices (Tasks)

7.  Using USB Devices (Overview)

8.  Using USB Devices (Tasks)

9.  Using InfiniBand Devices (Overview/Tasks)

10.  Managing Disks (Overview)

11.  Administering Disks (Tasks)

12.  SPARC: Adding a Disk (Tasks)

13.  x86: Adding a Disk (Tasks)

14.  Configuring iSCSI Storage Devices With COMSTAR

15.  Configuring and Managing the Solaris Internet Storage Name Service (iSNS)

16.  Managing Disk Use (Tasks)

17.  The format Utility (Reference)

18.  Managing File Systems (Overview)

19.  Creating ZFS, UFS, TMPFS, and LOFS File Systems (Tasks)

20.  Mounting and Unmounting File Systems (Tasks)

21.  Configuring Additional Swap Space (Tasks)

About Swap Space

Swap Space and Virtual Memory

Swap Space and the TMPFS File System

Swap Space as a Dump Device

Swap Space and Dynamic Reconfiguration

Configuring Swap Space in a SAN Environment

How Do I Know If I Need More Swap Space?

Swap-Related Error Messages

TMPFS-Related Error Messages

How Swap Space Is Allocated

Swap Areas and the /etc/vfstab File

Planning for Swap Space

Allocating Swap Space for UFS-Based Systems

Allocating Swap Space for ZFS-Based Systems

Monitoring Swap Resources

Adding More Swap Space

Creating a Swap File in a UFS Root Environment

mkfile Command

How to Create a Swap File and Make It Available in UFS Root Environment

Adding or Changing Swap Space in an Oracle Solaris ZFS Root Environment

How to Add Swap Space in an Oracle Solaris ZFS Root Environment

Removing a Swap File From Use

How to Remove a Swap Volume in a ZFS Root Environment

22.  Copying Files and File Systems (Tasks)

23.  Managing Tape Drives (Tasks)


Removing a Swap File From Use

If you have unneeded swap space, you can remove it.

How to Remove a Swap Volume in a ZFS Root Environment

Most systems require some amount of swap space configured. If your system's swap space requirements change, then you might need to remove a swap volume before you can increase or decrease space allocated for swap. On a busy system, it might be easier to create a second swap volume if you need to increase swap space rather than trying to remove a swap volume that is busy just to increase its size.

  1. Become an administrator.
  2. If the swap volume is in use, then you might not be able to delete it. Check to see if the swap area is in use.
    # swap -l
    swapfile             dev    swaplo   blocks     free
    /dev/zvol/dsk/rpool/swap 102,2        16 16646128 16646128

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

  3. If the swap area is not is use, remove the swap area.
    # swap -d /dev/zvol/dsk/rpool/swap
  4. Edit the /etc/vfstab file and delete the entry for the swap volume.
  5. Verify that the swap volume is no longer available.
    # swap -l