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Total: reserved=134GB, committed=132GB
-                 Java Heap (reserved=100GB, committed=99GB)
                            (mmap: reserved=100GB, committed=99GB)

-                    Thread (reserved=1GB, committed=1GB)
                            (thread #834)
                            (stack: reserved=1GB, committed=1GB)

-                        GC (reserved=4GB, committed=4GB)
                            (mmap: reserved=4GB, committed=4GB)

-                  Internal (reserved=29GB, committed=29GB)
                            (malloc=29GB #15358)

已知堆外内存在满了之前都不会主动释放，那么这个堆外内存将会一直增长到阈值（默认与堆内内存一样大），然后才释放，如果没到阈值系统内存就不够了，就会被杀死，具体释放逻辑可以见：https://blog.csdn.net/u013096088/article/details/78774627