Database - RAC/Scalability (MOSC)

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CRITICAL => Minimum memory used to reassemble IP fragments is not configured at recommended value.

edited Aug 21, 2023 4:21PM in Database - RAC/Scalability (MOSC) 7 commentsAnswered

Hello ,


I'm currently working on configuring an Oracle Real Application Clusters (RAC) environment and have encountered a critical warning related to the configuration of memory used for reassembling IP fragments.


The warning message states: "CRITICAL => Minimum memory used to reassemble IP fragments is not configured at recommended value". This suggests that the current setting for the net.ipv4.ipfrag_low_thresh parameter in my Linux system might not be optimal for the performance and reliability of the RAC environment.


Searching various sources including Oracle's official documentation, Red Hat solutions, and other networking resources, I've found that this parameter plays a crucial role in how IP fragments are handled in the system. However, I couldn't find a specific recommended value for this setting for Oracle RAC 19c on RHEL 8.

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