ORA-04031: unable to allocate XYZ bytes of shared memory ("shared pool", "unknown object", "sgaheap(2,0)", "kzsc:kzsctob_co") When SELECTing From Table With OLS Policy

(Doc ID 2173851.1)

Last updated on APRIL 09, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


SELECTing from a table protected by an Oracle Label Security (OLS) policy fails with:

ORA-04031: unable to allocate 4194328 bytes of shared memory ("shared pool", "unknown object", "sgaheap(2,0)", "kzsc:kzsctob_co")

Querying V$SGASTAT over time will show that "kzsc:kzscstob_co" is growing:



 Upgraded to


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