Warning At Instance Startup Relating To Shared Memory Settings
Last updated on SEPTEMBER 28, 2011
Applies to:Oracle Server - Enterprise Edition - Version: 126.96.36.199 to 188.8.131.52 - Release: 9.2 to 11.2
Information in this document applies to any platform.
You are seeing the following message reported on startup in the alertlog:
Starting ORACLE instance (normal)
WARNING: The system does not seem to be configured
optimally. Creating a segment of size 0x%s
failed. Please change the shm parameters so that
a segment can be created for this size. While this is
not a fatal issue, creating one segment may improve
This suggests that shared memory could be used more efficiently and improve performance.
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