"Library Cache Lock" Caused By Dbms_stats.save_inmemory_stats
(Doc ID 2509540.1)
Last updated on APRIL 17, 2023
Applies to:
Oracle Database - Enterprise Edition - Version 12.2.0.1 and later Information in this document applies to any platform.
Symptoms
On : 12.2.0.1 version, RDBMS
DDL with ALTER TABLE <table name> TRUNCATE SUBPARTITION, but it is hanging with "library cache lock" due to In-Memory worker process (W000) which runs dbms_stats.save_inmemory_stats
Dbms_stats.save_inmemory_stats runs indefinitely on a 12.2 database with inmemory enabled and places a library cache lock for the gather stats job, preventing from collecting statistics
Cause
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