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System Administration Guide: Devices and File Systems     Oracle Solaris 10 1/13 Information Library
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Document Information


1.  Managing Removable Media (Overview/Tasks)

2.  Writing CDs and DVDs (Tasks)

3.  Managing Devices (Tasks)

4.  Dynamically Configuring Devices (Tasks)

5.  Managing USB Devices (Tasks)

6.  Using InfiniBand Devices (Overview/Tasks)

7.  Managing Disks (Overview)

8.  Managing Disk Use (Tasks)

9.  Administering Disks (Tasks)

10.  SPARC: Setting Up Disks (Tasks)

11.  x86: Setting Up Disks (Tasks)

12.  Configuring Oracle Solaris iSCSI Targets (Tasks)

13.  The format Utility (Reference)

14.  Managing File Systems (Overview)

15.  Creating and Mounting File Systems (Tasks)

16.  Configuring Additional Swap Space (Tasks)

About Swap Space

Swap Space and Virtual Memory

Swap Space and the TMPFS File System

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 ZFS-Based Systems

Monitoring Swap Resources

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

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

17.  Checking UFS File System Consistency (Tasks)

18.  UFS File System (Reference)

19.  Backing Up and Restoring UFS File Systems (Overview/Tasks)

20.  Using UFS Snapshots (Tasks)

21.  Copying Files and File Systems (Tasks)

22.  Managing Tape Drives (Tasks)

23.  UFS Backup and Restore Commands (Reference)


How Swap Space Is Allocated

Initially, swap space is allocated as part of the Oracle Solaris installation process. In a ZFS root environment, the default swap size is generally in the 512 MB to 2 GB range.

For general guidelines on allocating swap space, see Planning for Swap Space.

Swap Areas and the /etc/vfstab File

After the system is installed, swap areas and swap files are listed in the /etc/vfstab file. They are activated by the /sbin/swapadd script when the system is booted.

An entry for a swap device in the /etc/vfstab file contains the following:

The file system that contains a swap file must be mounted before the swap file is activated. So, in the /etc/vfstab file, ensure that the entry that mounts the file system comes before the entry that activates the swap file.