The platform mbean(s) exposes more metrics that what is currently available at core-service=platform-mbean

• Active Thread Count
• Active Thread Group Count
• JVM Free memory
• JVM Total memory

OS metrics – java.lang:type=OperatingSystem

• Free Physical Memory – FreePhysicalMemorySize
• Free Swap Memory – FreeSwapSpaceSize
• Process CPU Time – ProcessCpuTime
• Committed Virtual Memory – CommittedVirtualMemorySize
• open files --OpenFileDescriptorCount

Threading

• SuspendedThreadCount
• DeadLockedThreadCount

Memory – java.lang:type=Memory

• operation to trigger gc – gc

And probably more