Hi Mandy, Thanks for the response! I hope you’re well!
We’d like to be able to get safepoint stats from within the JVM so we can post them to our observability system. Would creating a Bean (a la GarbageCollectorMXBean) that exposes this info make sense? I’d be happy to work on it if there’s interest. Would you recommend an alternative method? Tony ————— Tony Printezis | @TonyPrintezis | tprinte...@twitter.com On October 14, 2019 at 12:49:57 PM, Mandy Chung (mandy.ch...@oracle.com) wrote: jdk.internal.jvmstat is JDK internal unsupported API. jstat and jcmd monitors the JVM statistics that you can use but I think they don't show the safepoint counters by default. Mandy On 10/14/19 8:25 AM, Tony Printezis wrote: Is jvmstat a public / supported API? The jdk.internal.jvmstat module doesn’t seem to be exporting anything publicly (and it also has “internal” in its name). Tony ————— Tony Printezis | @TonyPrintezis | tprinte...@twitter.com On October 11, 2019 at 11:10:18 PM, Yasumasa Suenaga ( suen...@oss.nttdata.com) wrote: Hi, AFAIK the API for them does not provided, but we can use reader class for hsperfdata in jdk.internal.jvmstat module. Examples are available on my GitHub: https://github.com/YaSuenag/perfreader You can get safepoint statistics via sun.rt.safepoint* in hsperfdata. Yasumasa On 2019/10/12 10:30, Hohensee, Paul wrote: > I don’t know of any. Also, it appears that there are no uses of any of the HotspotRuntimeMBean methods in the JDK, so it could actually be removed! If you want to add its methods to a public interface, I’d create com.sun.management.RuntimeMXBean by analogy to c.s.m.ThreadMXBean and use the supported/enabled approach of *ThreadAllocatedBytes*. Needs a CSR, of course. > > Paul > > *From: *serviceability-dev <serviceability-dev-boun...@openjdk.java.net> on behalf of Tony Printezis <tprinte...@twitter.com> > *Date: *Friday, October 11, 2019 at 1:45 PM > *To: *"serviceability-dev@openjdk.java.net" < serviceability-dev@openjdk.java.net> > *Subject: *Safepoint Bean? > > Hi there, > > Is there a standard MBean (similar to GarbageCollectorMXBean), or other mechanism, that can be used to get safepoint statistics from Java (count, time, etc.)? I know it’s possible to get that info from sun.management.HotspotRuntime.java, but I assume this is not a publicly accessible API any more? Is there a standard alternative? > > Thanks, > > Tony > > ————— > > Tony Printezis | @TonyPrintezis | tprinte...@twitter.com <mailto: tprinte...@twitter.com> >
