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
<mailto:tprinte...@twitter.com>
On October 11, 2019 at 11:10:18 PM, Yasumasa Suenaga
(suen...@oss.nttdata.com <mailto: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
<mailto:serviceability-dev-boun...@openjdk.java.net>> on behalf of
Tony Printezis <tprinte...@twitter.com <mailto:tprinte...@twitter.com>>
> *Date: *Friday, October 11, 2019 at 1:45 PM
> *To: *"serviceability-dev@openjdk.java.net
<mailto:serviceability-dev@openjdk.java.net>"
<serviceability-dev@openjdk.java.net
<mailto: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> <mailto:tprinte...@twitter.com
<mailto:tprinte...@twitter.com>>
>
