New Parameter

SGA_MIN_SIZE in Oracle Database 12.2

I did summarize all new init.ora/spfile parameters in Oracle Database a while ago:

And one caught Roy’s and my attention: SGA_MIN_SIZE.

When we present this new parameter as part of the Multitenant slides in our workshops, some people ask themselves:
“What happens if I oversubscribe such a parameter?” For example, if SGA_TARGET=4G and I have 10 PDBs and define in each of them SGA_MIN_SIZE=500M. Will the 9th and 10th PDB not startup anymore? Or will the 7th PDB already in trouble as the CDB$ROOT will need some SGA portion as …

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New SPFILE parameters in Oracle Database with July 2016 (and newer) PSU/BP

New Parameters in Oracle Database with July 2016 PSU/BP

By following an internal discussion and checking parameter changes between Patch Set Updates (PSU) and Proactive Bundle Patches (BP) I learned that we introduced two new SPFILE parameters in Oracle Database with the July PSU and BP. One is documented in the patch readme, the other one can be found right now only in the Oracle Database manual:

The Oracle 12.2 documentation about ALLOW_GROUP_ACCESS_TO_SGA, the parameter which appears not in the Oracle 12.1 documentation right now, says:

ALLOW_GROUP_ACCESS_TO_SGA controls group access to shared memory

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New SPFILE parameters in Oracle Database

This is the 1st posting in my series about init.ora/SPFILE parameters in Oracle Database

Oracle Database is available now in the Oracle Cloud.

And this is the list of 46 new init.ora/spfile parameters compared to Oracle Database – including the links (where possible) to the Oracle Database 12.2 Reference documentation.




allow_global_dblinks LDAP lookup for DBLINKS
allow_group_access_to_sga Allow read access for SGA
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