I am trying to run the async performance tests described on the link below on my machine.
http://logging.apache.org/log4j/2.x/manual/async.html#Asynchronous_Logging_Performance I am not an expert with log4j, so here is how far I got after building log4j with maven: java -cp target/classes:target/test-classes:lib/disruptor-3.2.1.jar:../log4j-api/target/classes org.apache.logging.log4j.core.async.perftest.PerfTest org.apache.logging.log4j.core.async.perftest.RunLog4j2 blah blah.log 1 -verbose Then I get this in the output: avg=17 99%=32 99.99%=64 sampleCount=5000000 9962247 operations/second The questions I have are: 1. It looks like the source code IPerfTestRunner uses a much shorter message "Short Msg" instead of the 500 characters message stated in the link above. Is that intentional or is it a bug? Do we want to test the latency with the 500-character message or just a short message? 2. I notice that my logs are NOT going to any file. I am probably misconfiguring something with log4j. How do I generate a file with the messages from the performance test? 3. I just want to test with one asynchronous logging thread, so I am passing threadCount 1 above. What does the second parameter 'blah' mean? 4. Not sure why I get operations/seconds if I am not passing -throughput in the command-line. I just want to get the latency numbers for now. After that I will worry about throughput. So basically I just want to run the same test you run to see those great numbers on my production machine. Thanks for the help! -Becky