The installation process automatically creates a swap area and a dump device on a ZFS volume in the ZFS root pool.
The dump device is used when the directory where crash dumps are saved has insufficient space, or if you ran the dumpadm –n command syntax. The –n modifies the dump configuration to not run savecore automatically running after a system reboot.
Certain systems avail of the deferred dump feature in the current Oracle Solaris release. With this feature, a system dump is preserved in memory across a system reboot to enable you to analyze the crash dump after the system reboots. For more information, see About Devices and the Oracle Hardware Management Pack in Managing Devices in Oracle Solaris 11.3.
Note the following guidelines when managing swap and dump volumes:
On non-root pools, swap and dump volumes are supported on either single-disk configurations or mirrored configurations.
You must use separate ZFS volumes for the swap area and dump devices.
Sparse volumes are not supported for swap volumes.
Currently, using a swap file on a ZFS file system is not supported.