GP 6 - Invalid memory alloc request size

Err: Invalid memory alloc request size

Orca issue in GP6.11.0 
Due to ORCA memory error, it caused user function failure alone with segments going down.

DTXRollbackAndReleaseCurrentSubTransaction dispatch failed causing DTM error and makes segments to go down.

Orca error is causing a memory to not be properly released from the database and potentially impacting other concurrent processes that requrie reserved memory.

Failure with union clauses and the metrics collector causing 'Invalid Memory Alloc' have been fixed in GP6.12.0.

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