ORA-600 [Kghlatch_reg4] - Older Version of Patch 5508574 does not Fix the Problem

(Doc ID 603649.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Server - Enterprise Edition - Version:
AIX5L Based Systems (64-bit)


After migrating to a new AIX system, database fails to open with ORA-00600 [KGHLATCH_REG4]

Stack trace: kghlatch_register kglsgi kqlnfy kscnfy ksmcsg

Patch for  <> is already applied, but it does not help.

Starting with _kgl_latch_count=15 as workaround of <
enables the DB to open but now the DB processes use 70% of CPU
without users logged on.




Problem started after several instances, including this one, were migrated from
AIX5.3 ML4 to AIX 5.3 ML6. This system has 10 CPUs.


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms