Duplicate or Multiple Pmon Processes (Doc ID 1905239.1)

Last updated on AUGUST 29, 2014

Applies to:

Oracle Exadata Storage Server Software - Version 11.2.3.3.0 and later
Information in this document applies to any platform.

Symptoms

Multiple or Duplicate pmon processes spawned for the single instance. Though this issue with Exadata, but this doc can be used for referance for investigating Multiple Pmon processes. 

[root@ctspdbadm01 archive]# ps -ef | grep pmon | grep esadly

oresadly  20025      1  0 Jul01 ?        00:00:00 ora_pmon_esadly1
oresadly  20096      1  0 Jul01 ?        00:00:04 ora_pmon_esadly1

Changes

 Customer restart the DB Instance, after that start seeing Duplicate Pmon Process for same Instance. 

Cause

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