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Exachk Health-Check Tool for Exalogic incorrectly identifies low memory conditions on NM2-GW switches when they are not present (Doc ID 1612589.1)

Last updated on OCTOBER 12, 2018

Applies to:

Oracle Exalogic Elastic Cloud Software - Version 2.0.4.0.2 to 2.0.4.0.2
Information in this document applies to any platform.

Symptoms

You have run the Exachk Health-Check Tool for Exalogic, whose report contains a section Findings Needing Attention that flags items whose configuration or run-time state may not meet Exalogic best practices and may be in need of attention or additional validation. Within the Infiniband Switch section the report flags a warning that Free Memory is not at sufficient level for one or more of the NM2-GW Switches, as shown below:


In the more detailed information available by clicking the View Details link within the above summary, the report report illustrates that "free -m" on the switch reports an amount of free memory that is considerably lower than expected, possibly as low as between 9 and 12Mb, as shown below:


As a result of the warning, you are concerned that the low level of free memory reported by Exachk might indicate the presence of a memory leak by one of the processes running on the switch and that over time the level of free memory may continue to fall to a point where there is not enough memory available to sustain the expected behavior of the switch.

Cause

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In this Document
Symptoms
Cause
 An example illustrating the lower significance of free memory as reported by "free -m" relative to the additional information available via  /proc/meminfo
Solution
References


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