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Database processes on 8-socket X8M and X9M systems may temporarily experience increased IO latency when there is an HCA port down event (Doc ID 2893149.1)

Last updated on NOVEMBER 16, 2022

Applies to:

Oracle Exadata Storage Server Software - Version to [Release 21]
Exadata Database Machine X8-8/X8M-8 Hardware - Version All Versions and later
Exadata Database Machine X9M-8 Hardware - Version All Versions and later
Information in this document applies to any platform.


Database processes on Exadata X8M-8 and X9M-8 (8-socket RoCE-based) database servers may temporarily experience higher than normal IO latency when there is a RoCE network host channel adapter (HCA) port down event.  This issue affects Exadata versions 21.2.7 through 21.2.15.

In customer environments where this issue occurred the increased IO latency was imperceptible to the application.


A system exposed to this issue has file /etc/oracle/cell/network-config/cellaffinity.ora with no affinity map, as shown in the following example:




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