> On May 10, 2018, at 7:04 AM, Thomas Stüfe <thomas.stu...@gmail.com> wrote: > > Oh... maybe. You are right. And I see commas are not good either since > they are used in sub options (e.g. GC.class_stats). > > Alternative ideas could be using brackets surrounding the > command-and-options (e.g. '{''}'): > > jcmd { GC.class_stats columns=InstBytes,KlassBytes } { VM.metaspace > show-loaders }
are exposed braces safe in shells? > > I think technically we would not even need delimiters, since the > commands are as keywords limiting enough. E.g. one could just specify: > > jcmd GC.class_stats columns=InstBytes,KlassBytes VM.metaspace show-loaders I’d vote for this form. Simple.. — Kirk > > and that would be for jcmd too. It is more for the benefit of the user. > > On Thu, May 10, 2018 at 7:54 AM, Kirk Pepperdine > <kirk.pepperd...@gmail.com> wrote: >> Awesome idea! Would the semicolon would be an issue for shell scripts? >>> On May 10, 2018, at 6:52 AM, Thomas Stüfe <thomas.stu...@gmail.com> wrote: >>> >>> Hi all, >>> >>> just asking around for opinions. >>> >>> I am playing with the idea of bundling diagnostic commands to have >>> them executed at the same safepoint, in order to get results >>> consistent with each other. E.g. a heapdump and a corresponding >>> metaspace statistic. >>> >>> Syntax wise, I think one could specify multiple commands in jcmd >>> separated by comma or semicola: >>> >>> jcmd <command> <option> <option>; <command 2> <option> <option> >>> >>> What do you think, would that be a useful addition? >>> >>> Thanks, Thomas >>