netty直接内存监控

src/test/java/MemoryMonitorTest.java

@@ -0,0 +1,30 @@
+import io.netty.util.internal.PlatformDependent;
+
+import java.lang.management.BufferPoolMXBean;
+import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryMXBean;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+public class MemoryMonitorTest {
+    public static void main(String[] args) {
+        Map<String, Long> map = new TreeMap<>();
+        map.put("direct_netty", PlatformDependent.usedDirectMemory());
+        map.put("heap", memoryMXBean.getHeapMemoryUsage().getUsed());
+        map.put("non_heap", memoryMXBean.getNonHeapMemoryUsage().getUsed());
+        for (BufferPoolMXBean bufferPool : bufferPoolMXBeans) {
+            map.put("buffer_pool_" + fixName(bufferPool.getName()), bufferPool.getMemoryUsed());
+        }
+        for (Map.Entry<String, Long> entry : map.entrySet()) {
+            System.out.println(String.format("%18s    %s",entry.getKey(),entry.getValue()));
+        }
+    }
+
+    private static String fixName(String name) {
+        return name.replaceAll(" ", "_").replaceAll("'", "").replaceAll("-", "_");
+    }
+
+    private static MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
+    private static List<BufferPoolMXBean> bufferPoolMXBeans = ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class);
+}