RAC Performance and Eviction Issues on Solaris when DISM in Use
(Doc ID 1606318.1)
Last updated on DECEMBER 25, 2019
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.5 to 188.8.131.52 [Release 10.2 to 12.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Solaris on x86-64 (64-bit)
Oracle Solaris on SPARC (64-bit)
The use of DISM on Solaris systems (SPARC and x86-64) 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. It has been determined by engineering that the ASM instance is typically such a small memory footprint that it should not cause an issue.
From a Database and/or Clusterware perspective the Symptoms include:
- Overall Poor Performance including login problems
- Processing Delays Resulting in IPC errors
- Instance Evictions
- Node Evictions
From a system perspective the Symptoms include:
- High System Time (often exceeding 50%)
- GUDs will show numerous threads in the ipc_get system call
- Excessive swap usage
- Kernel Panics
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