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  1. Quarkus
  2. QUARKUS-3230

Performance degradation in quarkus log manager

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      #Run the application

```
java -jar target/quarkus-app/quarkus-run.jar
```

## run JMeter
Open the file `slow-logs-jmeter.jmx` in JMeter. Then run the jmeter Test Plan. With 300 Threads (Users) Observer that the response time is ~1 second.

## collect a stack trace
In a separate terminal, use `jps` to get the process id of the running java application

Observe that all threads are BLOCKED on a semaphore in the logmanager:
```
jstack <pid> | grep -A5 BLOCKED
```
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      #Run the application ``` java -jar target/quarkus-app/quarkus-run.jar ``` ## run JMeter Open the file `slow-logs-jmeter.jmx` in JMeter. Then run the jmeter Test Plan. With 300 Threads (Users) Observer that the response time is ~1 second. ## collect a stack trace In a separate terminal, use `jps` to get the process id of the running java application Observe that all threads are BLOCKED on a semaphore in the logmanager: ``` jstack <pid> | grep -A5 BLOCKED ```
    • ---

      Troubleshooting performance issues where the response time of our Quarkus application goes from 100ms to over 10 seconds under load (over 300 users accessing it).

      Reproducer attached

        1. jstack.txt
          489 kB
        2. slow-logs.tgz
          240 kB

            gandrian Georgios Andrianakis
            rhn-support-kkakarla kodandaRamu kakarla
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              Created:
              Updated:
              Resolved: