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Oracle® SuperCluster M8 and SuperCluster M7 Administration Guide

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Updated: June 2020

DISM Restrictions

DISM is not supported for use on SuperCluster M8 and SuperCluster M7 Oracle Solaris environments in instances other than the ASM instance. The use of DISM on the system outside of the ASM instance can lead to several different issues, ranging from excessive swap usage (even when memory is available) to kernel panics to performance problems. The ASM instance is typically such a small memory footprint that it should not cause an issue.

This behavior typically occurs on instances created after installation, because Solaris 11 uses ASM by default. To prevent this DISM issue when creating Oracle Solaris 11 instances, disable DISM. For more information see Disable DISM.

To decide if DISM is appropriate for your environment, and for more information about using DISM with an Oracle database, refer to the Oracle white paper Dynamic SGA Tuning of Oracle Database on Oracle Solaris with DISM at:


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