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OS Watcher is Taking Huge Space on Database Server (Doc ID 1577344.1)

Last updated on SEPTEMBER 28, 2021

Applies to:

Linux OS - Version Oracle Linux 5.8 and later
Exadata Database Machine V2 - Version All Versions and later
Exadata Database Machine X2-2 Hardware - Version All Versions and later
Exadata Database Machine X2-8 - Version All Versions and later
Exadata X3-2 Hardware - Version All Versions and later
Information in this document applies to any platform.

Symptoms

 

OS Watcher is consuming huge space on database nodes when there are many instances (100+ ) and many (ten thounsands) processes on the compute nodes.

Example for a system with 110 instances and 10000 processes, OS watcher archives takes 56GB space when OS watcher is run with default settings.
.

 top, RDS, ExadataOSW (includes lsof command output) dumps are particularly taking significant space due to high number of processes, and high number of open file and network descriptors.

 

** IMPORTANT NOTE **

OS watcher tool will be disabled in upcoming releases and be replaced by a complete rewrite named ExaWatcher. New version comes with more configuration options, proactive compression and clean up. The folllowing solution is a workaround in the current version of OS watcher for large customer systems.
 

Cause

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