Examples with GarbageCollectorMXBean java.lang.management.GarbageCollectorMXBean used on opensource projects

Example 46 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project hadoop by apache.

the class JvmMetrics method getGcUsage.

private void getGcUsage(MetricsRecordBuilder rb) {
    long count = 0;
    long timeMillis = 0;
    for (GarbageCollectorMXBean gcBean : gcBeans) {
        long c = gcBean.getCollectionCount();
        long t = gcBean.getCollectionTime();
        MetricsInfo[] gcInfo = getGcInfo(gcBean.getName());
        rb.addCounter(gcInfo[0], c).addCounter(gcInfo[1], t);
        count += c;
        timeMillis += t;
    }
    rb.addCounter(GcCount, count).addCounter(GcTimeMillis, timeMillis);
    if (pauseMonitor != null) {
        rb.addCounter(GcNumWarnThresholdExceeded, pauseMonitor.getNumGcWarnThresholdExceeded());
        rb.addCounter(GcNumInfoThresholdExceeded, pauseMonitor.getNumGcInfoThresholdExceeded());
        rb.addCounter(GcTotalExtraSleepTime, pauseMonitor.getTotalGcExtraSleepTime());
    }
}

Example 47 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project intellij-community by JetBrains.

the class LightPlatformTestCase method reportTestExecutionStatistics.

@SuppressWarnings("UseOfSystemOutOrSystemErr")
public static void reportTestExecutionStatistics() {
    System.out.println("----- TEST STATISTICS -----");
    UsefulTestCase.logSetupTeardownCosts();
    System.out.println(String.format("##teamcity[buildStatisticValue key='ideaTests.appInstancesCreated' value='%d']", MockApplication.INSTANCES_CREATED));
    System.out.println(String.format("##teamcity[buildStatisticValue key='ideaTests.projectInstancesCreated' value='%d']", ProjectManagerImpl.TEST_PROJECTS_CREATED));
    long totalGcTime = 0;
    for (GarbageCollectorMXBean mxBean : ManagementFactory.getGarbageCollectorMXBeans()) {
        totalGcTime += mxBean.getCollectionTime();
    }
    System.out.println(String.format("##teamcity[buildStatisticValue key='ideaTests.gcTimeMs' value='%d']", totalGcTime));
    System.out.println(String.format("##teamcity[buildStatisticValue key='ideaTests.classesLoaded' value='%d']", ManagementFactory.getClassLoadingMXBean().getTotalLoadedClassCount()));
}

Example 48 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project eiger by wlloyd.

the class GCInspector method logGCResults.

private void logGCResults() {
    for (GarbageCollectorMXBean gc : beans) {
        Long previousTotal = gctimes.get(gc.getName());
        Long total = gc.getCollectionTime();
        if (previousTotal == null)
            previousTotal = 0L;
        if (previousTotal.equals(total))
            continue;
        gctimes.put(gc.getName(), total);
        // may be zero for a really fast collection
        Long duration = total - previousTotal;
        Long previousCount = gccounts.get(gc.getName());
        Long count = gc.getCollectionCount();
        if (previousCount == null)
            previousCount = 0L;
        if (count.equals(previousCount))
            continue;
        gccounts.put(gc.getName(), count);
        MemoryUsage mu = membean.getHeapMemoryUsage();
        long memoryUsed = mu.getUsed();
        long memoryMax = mu.getMax();
        String st = String.format("GC for %s: %s ms for %s collections, %s used; max is %s", gc.getName(), duration, count - previousCount, memoryUsed, memoryMax);
        long durationPerCollection = duration / (count - previousCount);
        if (durationPerCollection > MIN_DURATION)
            logger.info(st);
        else if (logger.isDebugEnabled())
            logger.debug(st);
        if (durationPerCollection > MIN_DURATION_TPSTATS)
            StatusLogger.log();
        // if we just finished a full collection and we're still using a lot of memory, try to reduce the pressure
        if (gc.getName().equals("ConcurrentMarkSweep")) {
            SSTableDeletingTask.rescheduleFailedTasks();
            double usage = (double) memoryUsed / memoryMax;
            if (memoryUsed > DatabaseDescriptor.getReduceCacheSizesAt() * memoryMax && !cacheSizesReduced) {
                cacheSizesReduced = true;
                logger.warn("Heap is " + usage + " full.  You may need to reduce memtable and/or cache sizes.  Cassandra is now reducing cache sizes to free up memory.  Adjust reduce_cache_sizes_at threshold in cassandra.yaml if you don't want Cassandra to do this automatically");
                CacheService.instance.reduceCacheSizes();
            }
            if (memoryUsed > DatabaseDescriptor.getFlushLargestMemtablesAt() * memoryMax) {
                logger.warn("Heap is " + usage + " full.  You may need to reduce memtable and/or cache sizes.  Cassandra will now flush up to the two largest memtables to free up memory.  Adjust flush_largest_memtables_at threshold in cassandra.yaml if you don't want Cassandra to do this automatically");
                StorageService.instance.flushLargestMemtables();
            }
        }
    }
}

Example 49 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project pysonar2 by yinwang0.

the class $ method getGCStats.

public static String getGCStats() {
    long totalGC = 0;
    long gcTime = 0;
    for (GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) {
        long count = gc.getCollectionCount();
        if (count >= 0) {
            totalGC += count;
        }
        long time = gc.getCollectionTime();
        if (time >= 0) {
            gcTime += time;
        }
    }
    StringBuilder sb = new StringBuilder();
    sb.append(banner("memory stats"));
    sb.append("\n- total collections: " + totalGC);
    sb.append("\n- total collection time: " + formatTime(gcTime));
    Runtime runtime = Runtime.getRuntime();
    sb.append("\n- total memory: " + $.printMem(runtime.totalMemory()));
    return sb.toString();
}

Example 50 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project zm-mailbox by Zimbra.

the class MemoryStats method getGarbageCollectorNames.

/**
     * @return The name of all the Garbage Collectors in the system
     * 
     * For the default (serial) hotspot settings, this means:
     *     Copy - The copy collector, Eden and Minor GCs in Survivor
     *     MarkSweepCompact - Major GCs 
     * 
     */
public static String[] getGarbageCollectorNames() {
    List<GarbageCollectorMXBean> gcs = ManagementFactory.getGarbageCollectorMXBeans();
    String[] toRet = new String[gcs.size()];
    int i = 0;
    for (GarbageCollectorMXBean gc : gcs) {
        toRet[i] = gc.getName();
        i++;
    }
    return toRet;
}