GitHub user nsk-dvlpr added a comment to the discussion: Grails 7: 
Transaction/locking behaviour changes?

Hi @jdaugherty, 

Sorry for taking so long to reply.

I couldn't reproduce the issue locally, but seems that connection issues were a 
symptom, not a cause and the slowness was caused by our resources (CPU) quickly 
being maxed out (>95%) after the upgrade.

I did run a simple perf test to compare the results and below you can find a 
comparison of Grails 6 and Grails 7 CPU usage under the same load:

Grails 6:
<img width="531" height="183" alt="grails 6 cpu" 
src="https://github.com/user-attachments/assets/690da9c3-f01b-45d1-8936-071da55aee92";
 />

Grails 7.0.9:
<img width="524" height="180" alt="grails 7 cpu" 
src="https://github.com/user-attachments/assets/09517328-4836-4e1b-a36e-0abfbd2272f4";
 />

I'm still trying to figure out what exactly is taking those resources and if 
it's generic or specific to our application.
 
Have you encountered a similar issue?


GitHub link: 
https://github.com/apache/grails-core/discussions/15515#discussioncomment-16323479

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