Good suggestion, didn’t know about that page. I took what’s in Xusage.txt. Updated as following,
diff -r cd3eeeec74c0 src/java.base/share/classes/sun/launcher/resources/launcher.properties --- a/src/java.base/share/classes/sun/launcher/resources/launcher.properties Tue May 21 15:08:50 2019 -0700 +++ b/src/java.base/share/classes/sun/launcher/resources/launcher.properties Tue May 21 16:38:42 2019 -0700 @@ -138,6 +138,9 @@ \ -Xinternalversion\n\ \ displays more detailed JVM version information than the\n\ \ -version option\n\ +\ -Xlog:<opts> Configure or enable logging with the Java Virtual\n\ +\ Machine (JVM) unified logging framework. Use -Xlog:help\n\ +\ for details.\n\ \ -Xloggc:<file> log GC status to a file with time stamps\n\ \ -Xmixed mixed mode execution (default)\n\ \ -Xmn<size> sets the initial and maximum size (in bytes) of the heap\n\ diff -r cd3eeeec74c0 src/java.base/share/man/java.1 --- a/src/java.base/share/man/java.1 Tue May 21 15:08:50 2019 -0700 +++ b/src/java.base/share/man/java.1 Tue May 21 16:38:42 2019 -0700 @@ -732,6 +732,11 @@ option, and then exits\&. .RE .PP +\-Xlog:\fIopts\fR +.RS 4 +Configure or enable logging with the Java Virtual Machine (JVM) unified logging framework. Use \fB\-Xlog:help\fR for details. +.RE +.PP \-Xloggc:\fIfilename\fR .RS 4 Sets the file to which verbose GC events information should be redirected for logging\&. The information written to this file is similar to the output of Cheers, Henry > On May 21, 2019, at 4:11 PM, David Holmes <david.hol...@oracle.com> wrote: > > Hi Henry, > > On 22/05/2019 8:41 am, Henry Jen wrote: >> Hi, >> Please review a trivial patch that add some hints about how to use -Xlog in >> java help and man page. >> diff -r cd3eeeec74c0 >> src/java.base/share/classes/sun/launcher/resources/launcher.properties >> --- a/src/java.base/share/classes/sun/launcher/resources/launcher.properties >> Tue May 21 15:08:50 2019 -0700 >> +++ b/src/java.base/share/classes/sun/launcher/resources/launcher.properties >> Tue May 21 15:31:52 2019 -0700 >> @@ -138,6 +138,7 @@ >> \ -Xinternalversion\n\ >> \ displays more detailed JVM version information than >> the\n\ >> \ -version option\n\ >> +\ -Xlog:<opts> control JVM logging, use -Xlog:help for details > > I would suggest using the same words as used in the online tool reference > page [1]: > > Configure or enable logging with the Java Virtual Machine (JVM) unified > logging framework. Use -Xlog:help for details. > > Ditto for the man page. > > Cheers, > David > > [1] > https://docs.oracle.com/en/java/javase/12/tools/java.html#GUID-3B1CE181-CD30-4178-9602-230B800D4FAE > >> \ -Xloggc:<file> log GC status to a file with time stamps\n\ >> \ -Xmixed mixed mode execution (default)\n\ >> \ -Xmn<size> sets the initial and maximum size (in bytes) of the >> heap\n\ >> diff -r cd3eeeec74c0 src/java.base/share/man/java.1 >> --- a/src/java.base/share/man/java.1 Tue May 21 15:08:50 2019 -0700 >> +++ b/src/java.base/share/man/java.1 Tue May 21 15:31:52 2019 -0700 >> @@ -732,6 +732,11 @@ >> option, and then exits\&. >> .RE >> .PP >> +\-Xlog:\fIopts\fR >> +.RS 4 >> +Control JVM logging, use \fB\-Xlog:help\fR for details. >> +.RE >> +.PP >> \-Xloggc:\fIfilename\fR >> .RS 4 >> Sets the file to which verbose GC events information should be redirected >> for logging\&. The information written to this file is similar to the output >> of >> Cheers, >> Henry
