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Troubleshooting ORA-27090 due to aio-nr reaches aio-max-nr on Linux (Doc ID 2957824.1)

Last updated on MARCH 20, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Linux x86-64

Purpose

Provide a troubleshooting guide to diagnose ORA-27090 due to aio-nr reaches aio-max-nr.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 1. What will happen if aio-nr reaches aio-max-nr?
 2. What are the possible reasons of aio-nr reaches aio-max-nr?
 3. How to find if there are any AIO context leaks?
 4. If aio-nr has already reached aio-max-nr, how to find out which process has the most of active AIO contexts?
 5. Known issues
References


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