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Oracle 20c: New Base Level In memory option for free

With Oracle 20c, (as per preview details), introduced a new BASE_LEVEL value for the INMEMORY_FORCE parameter. When this new value is set the INMEMORY_SIZE parameter can be set up to a value of 16GB without having to license the Database In-Memory option. In fact, when the BASE_LEVEL value is set you cannot set the INMEMORY_SIZE parameter larger than 16GB. If you do then Oracle will generate an error message.

The 16GB limit applies at the container database (CDB) level. This means that all pluggable databases (PDBs) share the 16GB limit of the CDB. However, on RAC databases the Base Level feature allows a 16GB column store to be allocated on each RAC instance.

Feature tracking has been added to report usage of the Base Level feature as "In-Memory Base Level" so there should be no confusion as to whether the Base Level feature is being used or the full Database In-Memory option.

The new Base Level feature supports all Database In-Memory features except:
•    Automatic In-Memory  (AIM)
•    Compression levels other than memory compress for LOW
•    Excluded columns (all columns of a table are populated)
•    The CELLMEMORY feature on Exadata

August 3rd, 2020 | Tags: , , , , , , | Category: 20c Database, 21c Database

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