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I'm getting too large recording error while trying to open my 60 MB jfr file in JMC console. Please help me on this.

Thank you

Mani
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  • 60 MB is not a very large recording. i have opened recordings that are gigabytes. That said, if you have very little RAM on your machine it could be a problem. I think newer version of JMC and older JRockit versions will detect that the file is large and allow you select a subset of events. – Kire Haglin Feb 28 '18 at 08:39

2 Answers2

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Have you tried to run JMC with more memory? 

jmc -vmargs -Xms1024m -Xmx2048m

The other solution is to split the jfr file into smaller chunks and open that chunks.

Georg Leber
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  • I could not run jmc with -vmargs , I have tried splitting the files but I couldnt able to do it – Mani Feb 27 '18 at 13:52
  • What happens when you run with -vmargs? That’s what I would recommend as well. Other option to do the same is to edit the JDK/lib/missioncontrol/jmc.ini file and add the -Xmx option there. (File located a bit differently on Mac) – Klara Feb 27 '18 at 18:01
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I came across this page which provides a simple tool for splitting overly large JFR files into smaller chunks. The author works (or worked) at Oracle.

(But I can't find the source code, the JAR is not signed, and the download link is not even HTTPS protected. Be careful what you download ... and all that.)

Stephen C
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