Has anyone successfully used JFR (-XX) options?  

IBM's doc has instructions on using jcmd through the JVM attach facility only.  Using the attach facility would be awkward for me because the jobs run under a different ID than mine.

I can start recording with the -XX:StartFlightRecording option and get a trace under the default file name.  But if I try to do something like, -"XX:StartFlightRecording=settings=default.jfc" or "-XX:FlightRecorderOptions=filename=myrecording.jfr" I get no recording at all.

This makes me wonder if Semeru supports the command line options at all.

Thanks.

Hi Robert, 

Semeru does not yet support JFR command line options.  We've only begun our journey to add complete support for JFR.  Our currently released MVP only supports a few commands via JCMD at this time, but we are incrementally adding additional JFR features and events with each quarterly release.  Full command line support will be coming in 2026.

Tony Renaud

Semeru Software Dev Manager

Has anyone successfully used JFR (-XX) options?  

IBM's doc has instructions on using jcmd through the JVM attach facility only.  Using the attach facility would be awkward for me because the jobs run under a different ID than mine.

I can start recording with the -XX:StartFlightRecording option and get a trace under the default file name.  But if I try to do something like, -"XX:StartFlightRecording=settings=default.jfc" or "-XX:FlightRecorderOptions=filename=myrecording.jfr" I get no recording at all.

This makes me wonder if Semeru supports the command line options at all.

Thanks.

Hi Tony,

Thank you for your answer.

Does development have an ETA for when JFR will be fully supported?

Hi Robert, 

Semeru does not yet support JFR command line options.  We've only begun our journey to add complete support for JFR.  Our currently released MVP only supports a few commands via JCMD at this time, but we are incrementally adding additional JFR features and events with each quarterly release.  Full command line support will be coming in 2026.

Tony Renaud

Semeru Software Dev Manager

Has anyone successfully used JFR (-XX) options?  

IBM's doc has instructions on using jcmd through the JVM attach facility only.  Using the attach facility would be awkward for me because the jobs run under a different ID than mine.

I can start recording with the -XX:StartFlightRecording option and get a trace under the default file name.  But if I try to do something like, -"XX:StartFlightRecording=settings=default.jfc" or "-XX:FlightRecorderOptions=filename=myrecording.jfr" I get no recording at all.

This makes me wonder if Semeru supports the command line options at all.

Thanks.

Has anyone successfully used JFR (-XX) options?  

IBM's doc has instructions on using jcmd through the JVM attach facility only.  Using the attach facility would be awkward for me because the jobs run under a different ID than mine.

I can start recording with the -XX:StartFlightRecording option and get a trace under the default file name.  But if I try to do something like, -"XX:StartFlightRecording=settings=default.jfc" or "-XX:FlightRecorderOptions=filename=myrecording.jfr" I get no recording at all.

This makes me wonder if Semeru supports the command line options at all.

Thanks.