Database Hangs with ORA-7445 [kglic0()+1172], PMON Failed to Acquire Latch, ORA-29771
(Doc ID 2128960.1)
Last updated on MAY 20, 2021
Applies to:Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Next error is reported in the alert log:
The call stack from the trace file shows functions like:
In alert.log, also other errors are reported next to the ORA-7445 in the following order:
PMON failed to acquire latch, see PMON dump
LCK0 (ospid: 29766) waits for latch 'shared pool' for 92 secs.
ORA-29771: process USER (OSID 17702) blocks LCK0 (OSID 29766) for more than 70 seconds
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