This feature significantly enhances partitioning for Big Data SQL, where large portions of a table can reside in external partitions. Partitions can reside in both Oracle Database segments and in external files and sources. The In-Memory background processes, rather than a foreground process, now drop IM segments. In previous releases, population required using the POPULATE or REPOPULATE procedure of DBMS_INMEMORY.
OCTOPARSE AUTOMATIC MEMORY RELEASE DRIVERS
The ORACLE_HIVE and ORACLE_BIGDATA drivers are supported.Ī full table scan populates an In-Memory external table. This release introduces several manageability and performance improvements to the In-Memory external tables feature: See " Forcing Initial Population of an In-Memory Object".īig Data and performance enhancements for In-Memory external tables
A user-specified interval specifies the maximum time that the function waits before returning the value to the caller. The DBMS_INMEMORY_ADMIN.POPULATE_WAIT function initiates population of all INMEMORY objects that have a priority greater than or equal to the specified priority, and returns a status value for the population. See " Enabling the IM Column Store for a Database" and Oracle Database Licensing Information User Manual. The CELLMEMORY feature is disabled for Oracle Exadata. Also, the compression level for all objects and columns is set to QUERY LOW automatically and transparently, and Automatic In-Memory is disabled. When the Base Level is enabled, the IM column store size is limited to 16 GB for a CDB or non-CDB and for every database instance in an Oracle RAC database. The Base Level enables you to experiment with In-Memory features without purchasing the Oracle Database In-Memory option. This incurred the overhead of enabling the IMĮnable the Database In-Memory Base Level by setting the INMEMORY_FORCE initialization parameter to BASE_LEVEL. In previous releases of Oracle Database, in order to use theĬellMemory feature, you were required to enable the IM column store, even if you Is not enabled and queries can use CellMemory to scan objects. Starting with Oracle Database release 19c, version 19.8, you can use theĬellMemory feature without enabling the IM column store by setting TheĬELLMEMORY feature is disabled for Oracle Exadata. Level for all objects and columns is set to QUERY LOWĪutomatically and transparently, and Automatic In-Memory is disabled. When the Base Level is enabled, the IM column store size is limited to 16 GB for a CDB or non-CDBĪnd for every database instance in an Oracle RAC database. The Base Level enables you to experiment with In-Memory features without purchasing the
Starting with Oracle Database release 19c, version 19.8, you can enable the Database In-Memory Base Level by setting the INMEMORY_FORCE initialization parameter toīASE_LEVEL. The following major features are new in this release.
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