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Exalogic Virtual 2.0.6.4.X: Performance Issues on Dom0 Compute Nodes with "swiotlb buffer is full" Errors In Messages System Logs (Doc ID 2594953.1)

Last updated on OCTOBER 01, 2019

Applies to:

Oracle Exalogic Elastic Cloud Software - Version 2.0.6.4.0 to 2.0.6.4.190716
Linux x86-64
Oracle Virtual Server x86-64

Symptoms

In Exalogic 2.0.6.4.X Virtual racks, Performance issues (network communication issues, hang, system unresponsive) are seen on Dom0 Compute Nodes and Guest vServers running on Dom0 compute nodes. Below "swiotlb buffer is full" errors are seen in /var/log/messages system logs of affected Dom0 compute nodes at the time of the issue.

Changes

Possible increase in system load and network activity in Exalogic rack.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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