ADDM Reports Significant Virtual Memory Paging on Linux When None is Occurring (Doc ID 1322964.1)

Last updated on NOVEMBER 17, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.5 to 11.2.0.2 [Release 10.2 to 11.2]
Linux x86-64
Linux x86
Linux Itanium

Symptoms

After upgrading the database to 10.2.0.5, the ADDM report on Linux operation system may include findings on "Significant virtual memory paging":



FINDING 1: 100% impact (32719 seconds)
--------------------------------------
Significant virtual memory paging was detected on the host operating system.

RECOMMENDATION 1: Host Configuration, 100% benefit (32719 seconds)
ACTION: Host operating system was experiencing significant paging but
no particular root cause could be detected. Investigate processes that
do not belong to this instance running on the host that are
consuming significant amount of virtual memory. Also consider adding more
physical memory to the host.


There is no evidence at OS level of any problem with virtual memory paging. To verify that you are not really observing a memory problem, look at an operating system memory tool, such as vmstat:

  

 

 

Cause

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