$ docker run -d --memory=512m --name nmtdemo -v $PWD/docker/flags-demo.jar:/app.jar --entrypoint java flags-demo:jdk25-jdk \
    -XX:NativeMemoryTracking=summary -XX:MaxRAMPercentage=75 -jar /app.jar
$ docker exec nmtdemo jcmd 1 VM.native_memory summary

=== Diagnostic: -XX:NativeMemoryTracking=summary via jcmd ===
1:

Native Memory Tracking:

(Omitting categories weighting less than 1KB)

Total: reserved=1824154KB, committed=115878KB
       malloc: 34018KB #144561, peak=35841KB #140626
       mmap:   reserved=1790136KB, committed=81860KB

-                 Java Heap (reserved=393216KB, committed=23532KB)
                            (mmap: reserved=393216KB, committed=23532KB, at peak)

-                     Class (reserved=1049299KB, committed=5075KB)
                            (classes #8049)
                            (  instance classes #7466, array classes #583)
                            (malloc=723KB tag=Class #15577) (at peak)
                            (mmap: reserved=1048576KB, committed=4352KB, at peak)
                            (  Metadata:   )
                            (    reserved=65536KB, committed=27072KB)
                            (    used=26779KB)
                            (    waste=293KB =1.08%)
                            (  Class space:)
                            (    reserved=1048576KB, committed=4352KB)
                            (    used=4187KB)
                            (    waste=165KB =3.79%)

-                    Thread (reserved=17468KB, committed=1380KB)
                            (threads #17)
                            (stack: reserved=17408KB, committed=1320KB, peak=1320KB)
                            (malloc=42KB tag=Thread #105) (peak=51KB #108)
                            (arena=18KB #30) (peak=301KB #22)

-                      Code (reserved=252158KB, committed=16014KB)
                            (malloc=4465KB tag=Code #21734) (at peak)
                            (mmap: reserved=247692KB, committed=11548KB, at peak)
                            (arena=1KB #1) (peak=34KB #2)

-                        GC (reserved=1302KB, committed=102KB)
                            (malloc=22KB tag=GC #58) (peak=96KB #79)
                            (mmap: reserved=1280KB, committed=80KB, at peak)

-                  Compiler (reserved=8163KB, committed=8163KB)
                            (malloc=54KB tag=Compiler #86) (peak=69KB #91)
                            (arena=8110KB #14) (peak=22951KB #14)

-                  Internal (reserved=1324KB, committed=1324KB)
                            (malloc=1288KB tag=Internal #5521) (at peak)
                            (mmap: reserved=36KB, committed=36KB, at peak)

-                     Other (reserved=20KB, committed=20KB)
                            (malloc=20KB tag=Other #3) (at peak)

-                    Symbol (reserved=6745KB, committed=6745KB)
                            (malloc=6034KB tag=Symbol #93254) (at peak)
                            (arena=712KB #1) (at peak)

-    Native Memory Tracking (reserved=2576KB, committed=2576KB)
                            (malloc=35KB tag=Native Memory Tracking #619) (at peak)
                            (tracking overhead=2541KB)

-        Shared class space (reserved=16384KB, committed=13912KB, readonly=0KB)
                            (mmap: reserved=16384KB, committed=13912KB, peak=14120KB)

-               Arena Chunk (reserved=9219KB, committed=9219KB)
                            (malloc=9219KB tag=Arena Chunk #541) (peak=23793KB #558)

-                   Tracing (reserved=5KB, committed=5KB)
                            (malloc=5KB tag=Tracing #22) (at peak)

-                    Module (reserved=80KB, committed=80KB)
                            (malloc=80KB tag=Module #2158) (at peak)

-                 Safepoint (reserved=8KB, committed=8KB)
                            (mmap: reserved=8KB, committed=8KB, at peak)

-           Synchronization (reserved=483KB, committed=483KB)
                            (malloc=483KB tag=Synchronization #4738) (at peak)

-            Serviceability (reserved=17KB, committed=17KB)
                            (malloc=17KB tag=Serviceability #14) (peak=20KB #18)

-                 Metaspace (reserved=65672KB, committed=27208KB)
                            (malloc=136KB tag=Metaspace #46) (at peak)
                            (mmap: reserved=65536KB, committed=27072KB, at peak)

-      String Deduplication (reserved=1KB, committed=1KB)
                            (malloc=1KB tag=String Deduplication #8) (at peak)

-           Object Monitors (reserved=13KB, committed=13KB)
                            (malloc=13KB tag=Object Monitors #69) (at peak)