Query Parse Never Ends After Upgrade From 12.1 to 12.2
(Doc ID 2492165.1)
Last updated on MARCH 03, 2022
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
- After upgrade to 22.214.171.124,query does not finish:
SELECT count(distinct val1) FROM view_x
Errorstack on the hanging process shows a spin on CPU:
service name: SYS$USERS
O/S info: user: oracle, term: pts/3, ospid: 42075326
machine: program: sqlplus (TNS V1-V3)
application name: sqlplus (TNS V1-V3), hash value=
Current Wait Stack:
Not in wait; last wait ended 29 min 12 sec <<<<<<<<<<<<<<<<<<<<<<<
fixed_waits=0 flags=0x28 boundary=0x0/-1
Session Wait History:
elapsed time of 29 min 12 sec since last wait
Call stack contains kkqstRemRedundantGrBy.
Database upgraded from 126.96.36.199 to 188.8.131.52.
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