java.lang.management.MemoryType Java Examples

@Override
protected RegionProcedureStore createProcedureStore(Path storeDir) throws IOException {
  Pair<Long, MemoryType> pair = MemorySizeUtil.getGlobalMemStoreSize(conf);
  long globalMemStoreSize = pair.getFirst();
  boolean offheap = pair.getSecond() == MemoryType.NON_HEAP;
  float poolSizePercentage = offheap ? 1.0F :
    conf.getFloat(MemStoreLAB.CHUNK_POOL_MAXSIZE_KEY, MemStoreLAB.POOL_MAX_SIZE_DEFAULT);
  float initialCountPercentage =
    conf.getFloat(MemStoreLAB.CHUNK_POOL_INITIALSIZE_KEY, MemStoreLAB.POOL_INITIAL_SIZE_DEFAULT);
  int chunkSize = conf.getInt(MemStoreLAB.CHUNK_SIZE_KEY, MemStoreLAB.CHUNK_SIZE_DEFAULT);
  ChunkCreator.initialize(chunkSize, offheap, globalMemStoreSize, poolSizePercentage,
    initialCountPercentage, null);
  conf.setBoolean(MasterRegionFactory.USE_HSYNC_KEY, "hsync".equals(syncType));
  CommonFSUtils.setRootDir(conf, storeDir);
  MockServer server = new MockServer(conf);
  region = MasterRegionFactory.create(server);
  return new RegionProcedureStore(server, region, (fs, apth) -> {
  });
}
 

/**
 * Tests the methods {@link Util#enumConstants(Class)} and
 * {@link Util#enumVal(Class, String)}.
 */
@Test void testEnumConstants() {
  final Map<String, MemoryType> memoryTypeMap =
      Util.enumConstants(MemoryType.class);
  assertEquals(2, memoryTypeMap.size());
  assertEquals(MemoryType.HEAP, memoryTypeMap.get("HEAP"));
  assertEquals(MemoryType.NON_HEAP, memoryTypeMap.get("NON_HEAP"));
  try {
    memoryTypeMap.put("FOO", null);
    fail("expected exception");
  } catch (UnsupportedOperationException e) {
    // expected: map is immutable
  }

  assertEquals("HEAP", Util.enumVal(MemoryType.class, "HEAP").name());
  assertNull(Util.enumVal(MemoryType.class, "heap"));
  assertNull(Util.enumVal(MemoryType.class, "nonexistent"));
}
 

/**
 * Determines if the name of the memory pool MXBean provided matches a list of
 * known young generation pool names.
 * 
 * @param memoryPoolMXBean
 *          The memory pool MXBean to check.
 * @return True if the pool name matches a known young generation pool name,
 *         false otherwise.
 */
static boolean isEden(MemoryPoolMXBean memoryPoolMXBean) {
  if (memoryPoolMXBean.getType() != MemoryType.HEAP) {
    return false;
  }

  String name = memoryPoolMXBean.getName();

  return name.equals("Par Eden Space")  // Oracle ParNew with Concurrent Mark Sweep GC
      || name.equals("PS Eden Space")   // Oracle Parallel GC
      || name.equals("G1 Eden")         // Oracle G1 GC
      //|| name.equals("Nursery")       // BEA JRockit 1.5, 1.6 GC
      || name.equals("Eden Space")      // Hitachi 1.5 GC
      // Allow an unknown pool name to monitor
      || (HEAP_EDEN_POOL != null && name.equals(HEAP_EDEN_POOL));
}
 

/**
 * Tests the methods {@link Util#enumConstants(Class)} and
 * {@link Util#enumVal(Class, String)}.
 */
@Test public void testEnumConstants() {
  final Map<String, MemoryType> memoryTypeMap =
      Util.enumConstants(MemoryType.class);
  assertEquals(2, memoryTypeMap.size());
  assertEquals(MemoryType.HEAP, memoryTypeMap.get("HEAP"));
  assertEquals(MemoryType.NON_HEAP, memoryTypeMap.get("NON_HEAP"));
  try {
    memoryTypeMap.put("FOO", null);
    fail("expected exception");
  } catch (UnsupportedOperationException e) {
    // expected: map is immutable
  }

  assertEquals("HEAP", Util.enumVal(MemoryType.class, "HEAP").name());
  assertNull(Util.enumVal(MemoryType.class, "heap"));
  assertNull(Util.enumVal(MemoryType.class, "nonexistent"));
}
 

public RegionServerAccounting(Configuration conf) {
  Pair<Long, MemoryType> globalMemstoreSizePair = MemorySizeUtil.getGlobalMemStoreSize(conf);
  this.globalMemStoreLimit = globalMemstoreSizePair.getFirst();
  this.memType = globalMemstoreSizePair.getSecond();
  this.globalMemStoreLimitLowMarkPercent =
      MemorySizeUtil.getGlobalMemStoreHeapLowerMark(conf, this.memType == MemoryType.HEAP);
  // When off heap memstore in use we configure the global off heap space for memstore as bytes
  // not as % of max memory size. In such case, the lower water mark should be specified using the
  // key "hbase.regionserver.global.memstore.size.lower.limit" which says % of the global upper
  // bound and defaults to 95%. In on heap case also specifying this way is ideal. But in the past
  // we used to take lower bound also as the % of xmx (38% as default). For backward compatibility
  // for this deprecated config,we will fall back to read that config when new one is missing.
  // Only for on heap case, do this fallback mechanism. For off heap it makes no sense.
  // TODO When to get rid of the deprecated config? ie
  // "hbase.regionserver.global.memstore.lowerLimit". Can get rid of this boolean passing then.
  this.globalMemStoreLimitLowMark =
      (long) (this.globalMemStoreLimit * this.globalMemStoreLimitLowMarkPercent);
  this.globalOnHeapMemstoreLimit = MemorySizeUtil.getOnheapGlobalMemStoreSize(conf);
  this.globalOnHeapMemstoreLimitLowMark =
      (long) (this.globalOnHeapMemstoreLimit * this.globalMemStoreLimitLowMarkPercent);
  this.retainedRegionRWRequestsCnt = new ConcurrentHashMap<>();
}
 

/**
 * Return true if we're above the low watermark
 */
public FlushType isAboveLowWaterMark() {
  // for onheap memstore we check if the global memstore size and the
  // global heap overhead is greater than the global memstore lower mark limit
  if (memType == MemoryType.HEAP) {
    if (getGlobalMemStoreHeapSize() >= globalMemStoreLimitLowMark) {
      return FlushType.ABOVE_ONHEAP_LOWER_MARK;
    }
  } else {
    if (getGlobalMemStoreOffHeapSize() >= globalMemStoreLimitLowMark) {
      // Indicates that the offheap memstore's size is greater than the global memstore
      // lower limit
      return FlushType.ABOVE_OFFHEAP_LOWER_MARK;
    } else if (getGlobalMemStoreHeapSize() >= globalOnHeapMemstoreLimitLowMark) {
      // Indicates that the offheap memstore's heap overhead is greater than the global memstore
      // onheap lower limit
      return FlushType.ABOVE_ONHEAP_LOWER_MARK;
    }
  }
  return FlushType.NORMAL;
}
 

/**
 * Gets the memory pool statistics from the JVM.
 *
 * @param poolBeans The collection of memory pool beans.
 * @return A string denoting the names and sizes of the memory pools.
 */
public static String getMemoryPoolStatsAsString(List<MemoryPoolMXBean> poolBeans) {
	StringBuilder bld = new StringBuilder("Off-heap pool stats: ");
	int count = 0;
	
	for (MemoryPoolMXBean bean : poolBeans) {
		if (bean.getType() == MemoryType.NON_HEAP) {
			if (count > 0) {
				bld.append(", ");
			}
			count++;

			MemoryUsage usage = bean.getUsage();
			long used = usage.getUsed() >> 20;
			long committed = usage.getCommitted() >> 20;
			long max = usage.getMax() >> 20;
			
			bld.append('[').append(bean.getName()).append(": ");
			bld.append(used).append('/').append(committed).append('/').append(max);
			bld.append(" MB (used/committed/max)]");
		}
	}

	return bld.toString();
}
 

/**
 * Gets the memory pool statistics from the JVM.
 *
 * @param poolBeans The collection of memory pool beans.
 * @return A string denoting the names and sizes of the memory pools.
 */
public static String getMemoryPoolStatsAsString(List<MemoryPoolMXBean> poolBeans) {
	StringBuilder bld = new StringBuilder("Off-heap pool stats: ");
	int count = 0;
	
	for (MemoryPoolMXBean bean : poolBeans) {
		if (bean.getType() == MemoryType.NON_HEAP) {
			if (count > 0) {
				bld.append(", ");
			}
			count++;

			MemoryUsage usage = bean.getUsage();
			long used = usage.getUsed() >> 20;
			long committed = usage.getCommitted() >> 20;
			long max = usage.getMax() >> 20;
			
			bld.append('[').append(bean.getName()).append(": ");
			bld.append(used).append('/').append(committed).append('/').append(max);
			bld.append(" MB (used/committed/max)]");
		}
	}

	return bld.toString();
}
 

/**
 * Determines if the name of the memory pool MXBean provided matches a list of
 * known tenured pool names.
 * 
 * Package private for testing.
 * 
 * @param memoryPoolMXBean
 *          The memory pool MXBean to check.
 * @return True if the pool name matches a known tenured pool name, false
 *         otherwise.
 */
static boolean isTenured(MemoryPoolMXBean memoryPoolMXBean) {
  if (memoryPoolMXBean.getType() != MemoryType.HEAP) {
    return false;
  }
  
  String name = memoryPoolMXBean.getName();
  
  return name.equals("CMS Old Gen")     // Sun Concurrent Mark Sweep GC
      || name.equals("PS Old Gen")      // Sun Parallel GC
      || name.equals("G1 Old Gen")      // Sun G1 GC
      || name.equals("Old Space")       // BEA JRockit 1.5, 1.6 GC
      || name.equals("Tenured Gen")     // Hitachi 1.5 GC
      || name.equals("Java heap")       // IBM 1.5, 1.6 GC
      
      // Allow an unknown pool name to monitor
      || (HEAP_POOL != null && name.equals(HEAP_POOL));
}
 

@Nonnull
private Future<?> initializeMXBeanListenersLater(@Nonnull ExecutorService backendExecutorService) {
  // do it in the other thread to get it out of the way during startup
  return backendExecutorService.submit(() -> {
    try {
      for (MemoryPoolMXBean bean : ManagementFactory.getMemoryPoolMXBeans()) {
        if (bean.getType() == MemoryType.HEAP && bean.isCollectionUsageThresholdSupported() && bean.isUsageThresholdSupported()) {
          long max = bean.getUsage().getMax();
          long threshold = Math.min((long)(max * getOccupiedMemoryThreshold()), max - MEM_THRESHOLD);
          if (threshold > 0) {
            bean.setUsageThreshold(threshold);
            bean.setCollectionUsageThreshold(threshold);
          }
        }
      }
      ((NotificationEmitter)ManagementFactory.getMemoryMXBean()).addNotificationListener(myLowMemoryListener, null, null);
    }
    catch (Throwable e) {
      // should not happen normally
      getLogger().info("Errors initializing LowMemoryWatcher: ", e);
    }
  });
}
 

/**
 * collect the pool division of java
 */
protected Map<String, Object> getPoolDivision() {
    if (LOG.isDebugEnabled()) {
        LOG.debug("==> RangerJVMMetricUtil.getPoolDivision()");
    }

    Map<String, Object> poolDivisionValues = new LinkedHashMap<>();
    for (MemoryPoolMXBean mpBean : ManagementFactory.getMemoryPoolMXBeans()) {
        if (mpBean.getType() == MemoryType.HEAP) {
            poolDivisionValues.put(mpBean.getName(), mpBean.getUsage());
        }
    }

    if (LOG.isDebugEnabled()) {
        LOG.debug("<== RangerJVMMetricUtil.getPoolDivision()" + poolDivisionValues);
    }

    return poolDivisionValues;
}
 

protected void initializeMemStoreChunkCreator() {
  if (MemStoreLAB.isEnabled(conf)) {
    // MSLAB is enabled. So initialize MemStoreChunkPool
    // By this time, the MemstoreFlusher is already initialized. We can get the global limits from
    // it.
    Pair<Long, MemoryType> pair = MemorySizeUtil.getGlobalMemStoreSize(conf);
    long globalMemStoreSize = pair.getFirst();
    boolean offheap = this.regionServerAccounting.isOffheap();
    // When off heap memstore in use, take full area for chunk pool.
    float poolSizePercentage = offheap? 1.0F:
        conf.getFloat(MemStoreLAB.CHUNK_POOL_MAXSIZE_KEY, MemStoreLAB.POOL_MAX_SIZE_DEFAULT);
    float initialCountPercentage = conf.getFloat(MemStoreLAB.CHUNK_POOL_INITIALSIZE_KEY,
        MemStoreLAB.POOL_INITIAL_SIZE_DEFAULT);
    int chunkSize = conf.getInt(MemStoreLAB.CHUNK_SIZE_KEY, MemStoreLAB.CHUNK_SIZE_DEFAULT);
    // init the chunkCreator
    ChunkCreator.initialize(chunkSize, offheap, globalMemStoreSize, poolSizePercentage,
      initialCountPercentage, this.hMemManager);
  }
}
 

private void registerForNotifications() {
  // Register the listener with MemoryMXBean
  NotificationEmitter emitter = (NotificationEmitter) ManagementFactory.getMemoryMXBean();
  emitter.addNotificationListener(listener, null, null);

  // set collection usage threshold.
  for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
    if (pool.getType() == MemoryType.HEAP &&
      pool.isUsageThresholdSupported() &&
      pool.isCollectionUsageThresholdSupported()) {

      long threshold = (pool.getUsage().getMax() * thresholdPercentage) / 100;
      logger.info("setting collection threshold for " + pool.getName() +
        " with max " + pool.getUsage().getMax() +
        " to " + threshold);

      pool.setCollectionUsageThreshold(threshold);
      monitoredPools.put(pool.getName(), pool.getCollectionUsageThresholdCount());
    } else {
      logger.info("skip monitoring for pool " + pool.getName());
    }
  }
}
 

/**
 * Returns a summary information about the memory pools.
 */
public static String poolSummaries() {
    // Why ? list-archive?4273859
    // How ? http://stackoverflow.com/questions/697336/how-do-i-programmatically-find-out-my-permgen-space-usage
    //       http://stackoverflow.com/questions/8356416/xxmaxpermsize-with-or-without-xxpermsize
    StringBuilder sb = new StringBuilder();
    for (MemoryPoolMXBean item : ManagementFactory.getMemoryPoolMXBeans()) {
        String name = item.getName();
        MemoryType type = item.getType();
        MemoryUsage usage = item.getUsage();
        MemoryUsage peak = item.getPeakUsage();
        MemoryUsage collections = item.getCollectionUsage();
        sb.append("Memory pool name: " + name
                  + ", type: " + type
                  + ", usage: " + usage
                  + ", peak: " + peak
                  + ", collections: " + collections
                  + "\n");
    }
    return sb.toString();
}
 

/**
 * collect the pool division of java
 */
protected Map<String, Object> getPoolDivision() {
    if (LOG.isDebugEnabled()) {
        LOG.debug("==> RangerMetricsUtil.getPoolDivision()");
    }

    Map<String, Object> poolDivisionValues = new LinkedHashMap<>();
    for (MemoryPoolMXBean mpBean : ManagementFactory.getMemoryPoolMXBeans()) {
        if (mpBean.getType() == MemoryType.HEAP) {
            poolDivisionValues.put(mpBean.getName(), mpBean.getUsage());
        }
    }

    if (LOG.isDebugEnabled()) {
        LOG.debug("<== RangerMetricsUtil.getPoolDivision()" + poolDivisionValues);
    }

    return poolDivisionValues;
}
 

/**
 * @return Pair of global memstore size and memory type(ie. on heap or off heap).
 */
public static Pair<Long, MemoryType> getGlobalMemStoreSize(Configuration conf) {
  long offheapMSGlobal = conf.getLong(OFFHEAP_MEMSTORE_SIZE_KEY, 0);// Size in MBs
  if (offheapMSGlobal > 0) {
    // Off heap memstore size has not relevance when MSLAB is turned OFF. We will go with making
    // this entire size split into Chunks and pooling them in MemstoreLABPoool. We dont want to
    // create so many on demand off heap chunks. In fact when this off heap size is configured, we
    // will go with 100% of this size as the pool size
    if (MemStoreLAB.isEnabled(conf)) {
      // We are in offheap Memstore use
      long globalMemStoreLimit = (long) (offheapMSGlobal * 1024 * 1024); // Size in bytes
      return new Pair<>(globalMemStoreLimit, MemoryType.NON_HEAP);
    } else {
      // Off heap max memstore size is configured with turning off MSLAB. It makes no sense. Do a
      // warn log and go with on heap memstore percentage. By default it will be 40% of Xmx
      LOG.warn("There is no relevance of configuring '" + OFFHEAP_MEMSTORE_SIZE_KEY + "' when '"
          + MemStoreLAB.USEMSLAB_KEY + "' is turned off."
          + " Going with on heap global memstore size ('" + MEMSTORE_SIZE_KEY + "')");
    }
  }
  return new Pair<>(getOnheapGlobalMemStoreSize(conf), MemoryType.HEAP);
}
 

/**
 * Gets the memory pool statistics from the JVM.
 *
 * @param poolBeans The collection of memory pool beans.
 * @return A string denoting the names and sizes of the memory pools.
 */
public static String getMemoryPoolStatsAsString(List<MemoryPoolMXBean> poolBeans) {
	StringBuilder bld = new StringBuilder("Off-heap pool stats: ");
	int count = 0;
	
	for (MemoryPoolMXBean bean : poolBeans) {
		if (bean.getType() == MemoryType.NON_HEAP) {
			if (count > 0) {
				bld.append(", ");
			}
			count++;

			MemoryUsage usage = bean.getUsage();
			long used = usage.getUsed() >> 20;
			long committed = usage.getCommitted() >> 20;
			long max = usage.getMax() >> 20;
			
			bld.append('[').append(bean.getName()).append(": ");
			bld.append(used).append('/').append(committed).append('/').append(max);
			bld.append(" MB (used/committed/max)]");
		}
	}

	return bld.toString();
}
 

/**
 * Determines if the name of the memory pool MXBean provided matches a list of
 * known tenured pool names.
 * 
 * Package private for testing.
 * 
 * @param memoryPoolMXBean
 *          The memory pool MXBean to check.
 * @return True if the pool name matches a known tenured pool name, false
 *         otherwise.
 */
static boolean isTenured(MemoryPoolMXBean memoryPoolMXBean) {
  if (memoryPoolMXBean.getType() != MemoryType.HEAP) {
    return false;
  }
  
  String name = memoryPoolMXBean.getName();
  
  return name.equals("CMS Old Gen")     // Sun Concurrent Mark Sweep GC
      || name.equals("PS Old Gen")      // Sun Parallel GC
      || name.equals("G1 Old Gen")      // Sun G1 GC
      || name.equals("Old Space")       // BEA JRockit 1.5, 1.6 GC
      || name.equals("Tenured Gen")     // Hitachi 1.5 GC
      || name.equals("Java heap")       // IBM 1.5, 1.6 GC
      
      // Allow an unknown pool name to monitor
      || (HEAP_POOL != null && name.equals(HEAP_POOL));
}
 

/**
 * Determines if the name of the memory pool MXBean provided matches a list of
 * known young generation pool names.
 * 
 * @param memoryPoolMXBean
 *          The memory pool MXBean to check.
 * @return True if the pool name matches a known young generation pool name,
 *         false otherwise.
 */
static boolean isEden(MemoryPoolMXBean memoryPoolMXBean) {
  if (memoryPoolMXBean.getType() != MemoryType.HEAP) {
    return false;
  }

  String name = memoryPoolMXBean.getName();

  return name.equals("Par Eden Space")  // Oracle ParNew with Concurrent Mark Sweep GC
      || name.equals("PS Eden Space")   // Oracle Parallel GC
      || name.equals("G1 Eden")         // Oracle G1 GC
      //|| name.equals("Nursery")       // BEA JRockit 1.5, 1.6 GC
      || name.equals("Eden Space")      // Hitachi 1.5 GC
      // Allow an unknown pool name to monitor
      || (HEAP_EDEN_POOL != null && name.equals(HEAP_EDEN_POOL));
}
 

public MemoryMonitor() {
    LOG.info("initializing");
    this.springContextId = "Unknown";
    ManagementFactory.getThreadMXBean().setThreadContentionMonitoringEnabled(true);
    ManagementFactory.getThreadMXBean().setThreadCpuTimeEnabled(true);
    lowMemoryListener = new NotificationListener() {
        public void handleNotification(Notification n, Object hb) {
            if (n.getType().equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED)) {
                Map<String, String> memoryUsageStatistics = new HashMap<String, String>();
                memoryUsageStatistics.put("MemoryMXBean: " + MemoryType.HEAP, ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().toString());
                memoryUsageStatistics.put("MemoryMXBean:" + MemoryType.NON_HEAP, ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage().toString());
                for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
                    memoryUsageStatistics.put("MemoryPoolMXBean: " + pool.getType(), pool.getUsage().toString());
                }
                for (Listener listener : listeners) {
                    listener.memoryUsageLow(springContextId, memoryUsageStatistics, Arrays.toString(ManagementFactory.getThreadMXBean().findMonitorDeadlockedThreads()));
                }
            }
        }
    };
    ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).addNotificationListener(lowMemoryListener, null, null);
}
 

MemoryUsage getNonHeapMemoryUsage() {
    try {
        final Map<Object, Object> m = JvmContextFactory.getUserData();

        if (m != null) {
            final MemoryUsage cached = (MemoryUsage)
                m.get(nonHeapMemoryTag);
            if (cached != null) {
                log.debug("getNonHeapMemoryUsage",
                      "jvmMemory.getNonHeapMemoryUsage found in cache.");
                return cached;
            }

            final MemoryUsage u = getMemoryUsage(MemoryType.NON_HEAP);

            //  getNonHeapMemoryUsage() never returns null.
            //
            // if (u == null) u=MemoryUsage.INVALID;

            m.put(nonHeapMemoryTag,u);
            return u;
        }
        // Should never come here.
        // Log error!
        log.trace("getNonHeapMemoryUsage",
                  "ERROR: should never come here!");
        return getMemoryUsage(MemoryType.NON_HEAP);
    } catch (RuntimeException x) {
        log.trace("getNonHeapMemoryUsage",
              "Failed to get NonHeapMemoryUsage: " + x);
        log.debug("getNonHeapMemoryUsage",x);
        throw x;
    }

}
 

MemoryUsage getHeapMemoryUsage() {
    try {
        final Map<Object, Object> m = JvmContextFactory.getUserData();

        if (m != null) {
            final MemoryUsage cached = (MemoryUsage)m.get(heapMemoryTag);
            if (cached != null) {
                log.debug("getHeapMemoryUsage",
                      "jvmMemory.getHeapMemoryUsage found in cache.");
                return cached;
            }

            final MemoryUsage u = getMemoryUsage(MemoryType.HEAP);

            // getHeapMemoryUsage() never returns null.
            //
            // if (u == null) u=MemoryUsage.INVALID;

            m.put(heapMemoryTag,u);
            return u;
        }

        // Should never come here.
        // Log error!
        log.trace("getHeapMemoryUsage", "ERROR: should never come here!");
        return getMemoryUsage(MemoryType.HEAP);
    } catch (RuntimeException x) {
        log.trace("getHeapMemoryUsage",
              "Failed to get HeapMemoryUsage: " + x);
        log.debug("getHeapMemoryUsage",x);
        throw x;
    }
}
 

/**
 * Determines if the name of the memory pool MXBean provided matches a list of
 * known survivor space pool names.
 * 
 * @param memoryPoolMXBean
 *          The memory pool MXBean to check.
 * @return True if the pool name matches a known survivor space pool name,
 *         false otherwise.
 */
static boolean isSurvivor(MemoryPoolMXBean memoryPoolMXBean) {
  if (memoryPoolMXBean.getType() != MemoryType.HEAP) {
    return false;
  }

  String name = memoryPoolMXBean.getName();

  return name.equals("Par Survivor Space")  // Oracle Concurrent Mark Sweep GC
      || name.equals("PS Survivor Space")   // Oracle Parallel GC
      || name.equals("G1 Survivor")         // Oracle G1 GC
      || name.equals("Survivor Space")      // Hitachi 1.5 GC
      // Allow an unknown pool name to monitor
      || (HEAP_SURVIVOR_POOL != null && name.equals(HEAP_SURVIVOR_POOL));
}
 

private MemoryUsage getMemoryUsage(MemoryType type) {
    if (type == MemoryType.HEAP) {
        return ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
    } else {
        return ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage();
    }
}
 

MemoryUsage getHeapMemoryUsage() {
    try {
        final Map<Object, Object> m = JvmContextFactory.getUserData();

        if (m != null) {
            final MemoryUsage cached = (MemoryUsage)m.get(heapMemoryTag);
            if (cached != null) {
                log.debug("getHeapMemoryUsage",
                      "jvmMemory.getHeapMemoryUsage found in cache.");
                return cached;
            }

            final MemoryUsage u = getMemoryUsage(MemoryType.HEAP);

            // getHeapMemoryUsage() never returns null.
            //
            // if (u == null) u=MemoryUsage.INVALID;

            m.put(heapMemoryTag,u);
            return u;
        }

        // Should never come here.
        // Log error!
        log.trace("getHeapMemoryUsage", "ERROR: should never come here!");
        return getMemoryUsage(MemoryType.HEAP);
    } catch (RuntimeException x) {
        log.trace("getHeapMemoryUsage",
              "Failed to get HeapMemoryUsage: " + x);
        log.debug("getHeapMemoryUsage",x);
        throw x;
    }
}
 

MemoryUsage getHeapMemoryUsage() {
    try {
        final Map<Object, Object> m = JvmContextFactory.getUserData();

        if (m != null) {
            final MemoryUsage cached = (MemoryUsage)m.get(heapMemoryTag);
            if (cached != null) {
                log.debug("getHeapMemoryUsage",
                      "jvmMemory.getHeapMemoryUsage found in cache.");
                return cached;
            }

            final MemoryUsage u = getMemoryUsage(MemoryType.HEAP);

            // getHeapMemoryUsage() never returns null.
            //
            // if (u == null) u=MemoryUsage.INVALID;

            m.put(heapMemoryTag,u);
            return u;
        }

        // Should never come here.
        // Log error!
        log.trace("getHeapMemoryUsage", "ERROR: should never come here!");
        return getMemoryUsage(MemoryType.HEAP);
    } catch (RuntimeException x) {
        log.trace("getHeapMemoryUsage",
              "Failed to get HeapMemoryUsage: " + x);
        log.debug("getHeapMemoryUsage",x);
        throw x;
    }
}
 

/**
 * Return true if we are above the memstore high water mark
 * @return the flushtype
 */
public FlushType isAboveHighWaterMark() {
  // for onheap memstore we check if the global memstore size and the
  // global heap overhead is greater than the global memstore limit
  if (memType == MemoryType.HEAP) {
    if (getGlobalMemStoreHeapSize() >= globalMemStoreLimit) {
      return FlushType.ABOVE_ONHEAP_HIGHER_MARK;
    }
  } else {
    // If the configured memstore is offheap, check for two things
    // 1) If the global memstore off-heap size is greater than the configured
    // 'hbase.regionserver.offheap.global.memstore.size'
    // 2) If the global memstore heap size is greater than the configured onheap
    // global memstore limit 'hbase.regionserver.global.memstore.size'.
    // We do this to avoid OOME incase of scenarios where the heap is occupied with
    // lot of onheap references to the cells in memstore
    if (getGlobalMemStoreOffHeapSize() >= globalMemStoreLimit) {
      // Indicates that global memstore size is above the configured
      // 'hbase.regionserver.offheap.global.memstore.size'
      return FlushType.ABOVE_OFFHEAP_HIGHER_MARK;
    } else if (getGlobalMemStoreHeapSize() >= this.globalOnHeapMemstoreLimit) {
      // Indicates that the offheap memstore's heap overhead is greater than the
      // configured 'hbase.regionserver.global.memstore.size'.
      return FlushType.ABOVE_ONHEAP_HIGHER_MARK;
    }
  }
  return FlushType.NORMAL;
}
 

/**
 * @return the flush pressure of all stores on this regionserver. The value should be greater than
 *         or equal to 0.0, and any value greater than 1.0 means we enter the emergency state that
 *         global memstore size already exceeds lower limit.
 */
public double getFlushPressure() {
  if (memType == MemoryType.HEAP) {
    return (getGlobalMemStoreHeapSize()) * 1.0 / globalMemStoreLimitLowMark;
  } else {
    return Math.max(getGlobalMemStoreOffHeapSize() * 1.0 / globalMemStoreLimitLowMark,
        getGlobalMemStoreHeapSize() * 1.0 / globalOnHeapMemstoreLimitLowMark);
  }
}
 

MemoryUsage getHeapMemoryUsage() {
    try {
        final Map<Object, Object> m = JvmContextFactory.getUserData();

        if (m != null) {
            final MemoryUsage cached = (MemoryUsage)m.get(heapMemoryTag);
            if (cached != null) {
                log.debug("getHeapMemoryUsage",
                      "jvmMemory.getHeapMemoryUsage found in cache.");
                return cached;
            }

            final MemoryUsage u = getMemoryUsage(MemoryType.HEAP);

            // getHeapMemoryUsage() never returns null.
            //
            // if (u == null) u=MemoryUsage.INVALID;

            m.put(heapMemoryTag,u);
            return u;
        }

        // Should never come here.
        // Log error!
        log.trace("getHeapMemoryUsage", "ERROR: should never come here!");
        return getMemoryUsage(MemoryType.HEAP);
    } catch (RuntimeException x) {
        log.trace("getHeapMemoryUsage",
              "Failed to get HeapMemoryUsage: " + x);
        log.debug("getHeapMemoryUsage",x);
        throw x;
    }
}
 

MemoryUsage getNonHeapMemoryUsage() {
    try {
        final Map<Object, Object> m = JvmContextFactory.getUserData();

        if (m != null) {
            final MemoryUsage cached = (MemoryUsage)
                m.get(nonHeapMemoryTag);
            if (cached != null) {
                log.debug("getNonHeapMemoryUsage",
                      "jvmMemory.getNonHeapMemoryUsage found in cache.");
                return cached;
            }

            final MemoryUsage u = getMemoryUsage(MemoryType.NON_HEAP);

            //  getNonHeapMemoryUsage() never returns null.
            //
            // if (u == null) u=MemoryUsage.INVALID;

            m.put(nonHeapMemoryTag,u);
            return u;
        }
        // Should never come here.
        // Log error!
        log.trace("getNonHeapMemoryUsage",
                  "ERROR: should never come here!");
        return getMemoryUsage(MemoryType.NON_HEAP);
    } catch (RuntimeException x) {
        log.trace("getNonHeapMemoryUsage",
              "Failed to get NonHeapMemoryUsage: " + x);
        log.debug("getNonHeapMemoryUsage",x);
        throw x;
    }

}