My Oracle Support Banner

High RSS memory for IPC0 observed when Exafusion is enabled (Doc ID 2407743.1)

Last updated on FEBRUARY 27, 2019

Applies to:

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


On systems where Exafusion is enabled, the IPC0 background process is seen with a high RSS (resident set size) memory usage in OS commands like “top” and “ps”.

Exafusion is enabled by default in releases 12.2 and newer releases. 

To determine if Exafusion is enabled, please look for the following string in the database instance alert log file.

RDBMS Version 12.1:


GI/RDBMS upgraded to 12.2 or 18.1 release 


To view full details, sign in with your My Oracle Support account.

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

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.