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

Example 21 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project gradle by gradle.

the class GarbageCollectionCheck method run.

@Override
public void run() {
    List<GarbageCollectorMXBean> garbageCollectorMXBeans = ManagementFactory.getGarbageCollectorMXBeans();
    GarbageCollectorMXBean garbageCollectorMXBean = CollectionUtils.findFirst(garbageCollectorMXBeans, new Spec<GarbageCollectorMXBean>() {

        @Override
        public boolean isSatisfiedBy(GarbageCollectorMXBean mbean) {
            return mbean.getName().equals(garbageCollector);
        }
    });
    List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean memoryPoolMXBean : memoryPoolMXBeans) {
        String pool = memoryPoolMXBean.getName();
        if (memoryPools.contains(pool)) {
            GarbageCollectionEvent event = new GarbageCollectionEvent(System.currentTimeMillis(), memoryPoolMXBean.getCollectionUsage(), garbageCollectorMXBean.getCollectionCount());
            events.get(pool).slideAndInsert(event);
        }
    }
}

Example 22 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project jdk8u_jdk by JetBrains.

the class MXBeanInteropTest1 method doGarbageCollectorMXBeanTest.

private final int doGarbageCollectorMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0;
    System.out.println("---- GarbageCollectorMXBean");
    try {
        ObjectName filterName = new ObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
        Set<ObjectName> onSet = mbsc.queryNames(filterName, null);
        for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
            ObjectName garbageName = iter.next();
            System.out.println("-------- " + garbageName);
            MBeanInfo mbInfo = mbsc.getMBeanInfo(garbageName);
            errorCount += checkNonEmpty(mbInfo);
            System.out.println("getMBeanInfo\t\t" + mbInfo);
            GarbageCollectorMXBean garbage = null;
            garbage = JMX.newMXBeanProxy(mbsc, garbageName, GarbageCollectorMXBean.class);
            System.out.println("getCollectionCount\t\t" + garbage.getCollectionCount());
            System.out.println("getCollectionTime\t\t" + garbage.getCollectionTime());
        }
        System.out.println("---- OK\n");
    } catch (Exception e) {
        Utils.printThrowable(e, true);
        errorCount++;
        System.out.println("---- ERROR\n");
    }
    return errorCount;
}

Example 23 with GarbageCollectorMXBean

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

the class MemoryStats method dumpGarbageCollectors.

/**
     * Output human-readable information about the garbage collectors in the system
     * 
     * @return
     */
public static String dumpGarbageCollectors() {
    StringBuilder sb = new StringBuilder();
    List<GarbageCollectorMXBean> gcs = ManagementFactory.getGarbageCollectorMXBeans();
    for (GarbageCollectorMXBean gc : gcs) {
        long timePerGc = 0;
        if (gc.getCollectionCount() > 0) {
            timePerGc = gc.getCollectionTime() / gc.getCollectionCount();
        }
        sb.append(new Formatter().format("GC: %s(%s)  count=%d  time=%d(%,dms per collection)\n", gc.getName(), gc.isValid() ? "VALID" : "INVALID", gc.getCollectionCount(), gc.getCollectionTime(), timePerGc));
        sb.append(new Formatter().format("\tPools: \""));
        for (String s : gc.getMemoryPoolNames()) {
            sb.append(s).append(", ");
        }
        sb.append("\"\n");
    }
    return sb.toString();
}

Example 24 with GarbageCollectorMXBean

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

the class EnvironmentDumpProvider method dumpGCInformation.

private void dumpGCInformation(final PrintWriter outPW) {
    final List<GarbageCollectorMXBean> mxBeans = ManagementFactory.getGarbageCollectorMXBeans();
    if (null == mxBeans || mxBeans.isEmpty()) {
        return;
    }
    final MemoryMXBean memoryMxBean = ManagementFactory.getMemoryMXBean();
    if (memoryMxBean != null) {
        outPW.printf(INDENT_KEY_VALUE_FORMAT, "pending objects", formatLong(memoryMxBean.getObjectPendingFinalizationCount())).println();
    }
    final String gcFormat = "'%1$s' collections: %2$s\ttime: %3$s";
    outPW.println();
    for (final GarbageCollectorMXBean mxBean : mxBeans) {
        if (null == mxBean) {
            continue;
        }
        outPW.printf(KEY_VALUE_FORMAT, "Garbage Collectors", String.format(gcFormat, mxBean.getName(), formatLong(mxBean.getCollectionCount()), printDuration(mxBean.getCollectionTime()))).println();
    }
}

Example 25 with GarbageCollectorMXBean

use of java.lang.management.GarbageCollectorMXBean in project logging-log4j2 by apache.

the class SimplePerfTest method main.

public static void main(final String[] args) throws Exception {
    System.setProperty("Log4jContextSelector", AsyncLoggerContextSelector.class.getName());
    final Logger logger = LogManager.getLogger();
    if (!(logger instanceof AsyncLogger)) {
        throw new IllegalStateException();
    }
    // work around a bug in Log4j-2.5
    workAroundLog4j2_5Bug();
    logger.error("Starting...");
    System.out.println("Starting...");
    Thread.sleep(100);
    final RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
    final long testStartNanos = System.nanoTime();
    final long[] UPTIMES = new long[1024];
    final long[] DURATIONS = new long[1024];
    // warmup
    final long startMs = System.currentTimeMillis();
    final long end = startMs + TimeUnit.SECONDS.toMillis(10);
    int warmupCount = 0;
    do {
        runTest(logger, runtimeMXBean, UPTIMES, DURATIONS, warmupCount);
        warmupCount++;
    // Thread.sleep(1000);// drain buffer
    } while (System.currentTimeMillis() < end);
    final int COUNT = 10;
    for (int i = 0; i < COUNT; i++) {
        final int count = warmupCount + i;
        runTest(logger, runtimeMXBean, UPTIMES, DURATIONS, count);
    // Thread.sleep(1000);// drain buffer
    }
    final double testDurationNanos = System.nanoTime() - testStartNanos;
    System.out.println("Done. Calculating stats...");
    printReport("Warmup", UPTIMES, DURATIONS, 0, warmupCount);
    printReport("Test", UPTIMES, DURATIONS, warmupCount, COUNT);
    final StringBuilder sb = new StringBuilder(512);
    sb.append("Test took: ").append(testDurationNanos / (1000.0 * 1000.0 * 1000.0)).append(" sec");
    System.out.println(sb);
    final List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
    for (int i = 0; i < gcBeans.size(); i++) {
        final GarbageCollectorMXBean gcBean = gcBeans.get(i);
        sb.setLength(0);
        sb.append("GC[").append(gcBean.getName()).append("] ");
        sb.append(gcBean.getCollectionCount()).append(" collections, collection time=");
        sb.append(gcBean.getCollectionTime()).append(" millis.");
        System.out.println(sb);
    }
}