.Net Application Slows Down Intermittently due to Thread Starvation (Doc ID 2951105.1)

Last updated on MAY 26, 2023

Applies to:

Symptoms

Note: This issue is particular to .Net applications running in Microsoft Windows.

The application environment matches closely to:

Web app: ASP.NET MVC .NET Framework 4.7.2

Hosted in Azure and/or running on Microsoft Windows host.

Web app thread pool custom setting is very high. For example: System.Threading.ThreadPool.SetMinThreads(600, 600)

Connection String includes very high pool settings and low connection timeouts. For example: Max Pool Size=100000;Connection Timeout=5;

MySQL Connector/.Net 8.0.30 version being used.

Connections from the application are working fine and then randomly, the cpu/memory increases and connections start to timeout and/or give errors.
After a period of time, the connection issue resolve and are back to normal.

Appears in the error logs on MySQL Server as:

Changes

Cause

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