ORA-27102 out of memory when upgrading to 12c
This is to document an issue we had while upgrading our 11g databases to 12c.
We were upgrading 11.2.0.3 and 11.2.0.4 instances to 12.1.0.2.
Hopefully, if you encounter similar problems, this document will help you get past the upgrade.
UPDATE: This issue is now addressed in Bug 21047848 and fixed in 12.2
Our environment was as follows:
- T5 Oracle/Solaris server with 1TB of memory
- 11.2.0.3 instance on a container with full access to the 1TB memory
- The T5 server uses ZFS file system for root and /tmp
- The database datafiles are not using ZFS file system.
Our experience
- Initially, we were able to upgrade a database to 12.1.0.2 on the container, and this was done a few weeks previously.
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