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

Example 11 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project siddhi by wso2.

the class ObjectSizeCalculator method getEffectiveMemoryLayoutSpecification.

@VisibleForTesting
static MemoryLayoutSpecification getEffectiveMemoryLayoutSpecification() {
    final String vmName = System.getProperty("java.vm.name");
    if (vmName == null || !(vmName.startsWith("Java HotSpot(TM) ") || vmName.startsWith("OpenJDK") || vmName.startsWith("TwitterJDK"))) {
        throw new UnsupportedOperationException("ObjectSizeCalculator only supported on HotSpot VM");
    }
    final String dataModel = System.getProperty("sun.arch.data.model");
    if ("32".equals(dataModel)) {
        // Running with 32-bit data model.
        return new MemoryLayoutSpecification() {

            @Override
            public int getArrayHeaderSize() {
                return 12;
            }

            @Override
            public int getObjectHeaderSize() {
                return 8;
            }

            @Override
            public int getObjectPadding() {
                return 8;
            }

            @Override
            public int getReferenceSize() {
                return 4;
            }

            @Override
            public int getSuperclassFieldPadding() {
                return 4;
            }
        };
    } else if (!"64".equals(dataModel)) {
        throw new UnsupportedOperationException("Unrecognized value '" + dataModel + "' of sun.arch.data.model system property");
    }
    final String strVmVersion = System.getProperty("java.vm.version");
    final int vmVersion = Integer.parseInt(strVmVersion.substring(0, strVmVersion.indexOf('.')));
    if (vmVersion >= 17) {
        long maxMemory = 0;
        for (MemoryPoolMXBean mp : ManagementFactory.getMemoryPoolMXBeans()) {
            maxMemory += mp.getUsage().getMax();
        }
        if (maxMemory < 30L * 1024 * 1024 * 1024) {
            // for all memory pools (yes, including code cache).
            return new MemoryLayoutSpecification() {

                @Override
                public int getArrayHeaderSize() {
                    return 16;
                }

                @Override
                public int getObjectHeaderSize() {
                    return 12;
                }

                @Override
                public int getObjectPadding() {
                    return 8;
                }

                @Override
                public int getReferenceSize() {
                    return 4;
                }

                @Override
                public int getSuperclassFieldPadding() {
                    return 4;
                }
            };
        }
    }
    // In other cases, it's a 64-bit uncompressed OOPs object model
    return new MemoryLayoutSpecification() {

        @Override
        public int getArrayHeaderSize() {
            return 24;
        }

        @Override
        public int getObjectHeaderSize() {
            return 16;
        }

        @Override
        public int getObjectPadding() {
            return 8;
        }

        @Override
        public int getReferenceSize() {
            return 8;
        }

        @Override
        public int getSuperclassFieldPadding() {
            return 8;
        }
    };
}

Example 12 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project felix by apache.

the class MemoryUsageSupport method getMemoryPoolsJson.

final String getMemoryPoolsJson() {
    final StringBuilder buf = new StringBuilder();
    buf.append("[");
    long usedTotal = 0;
    long initTotal = 0;
    long committedTotal = 0;
    long maxTotal = 0;
    final List<MemoryPoolMXBean> pools = getMemoryPools();
    for (MemoryPoolMXBean pool : pools) {
        buf.append("{");
        buf.append("'name':'").append(pool.getName()).append('\'');
        buf.append(",'type':'").append(pool.getType()).append('\'');
        MemoryUsage usage = pool.getUsage();
        final long used = usage.getUsed();
        formatNumber(buf, "used", used);
        if (used > -1) {
            usedTotal += used;
        }
        final long init = usage.getInit();
        formatNumber(buf, "init", init);
        if (init > -1) {
            initTotal += init;
        }
        final long committed = usage.getCommitted();
        formatNumber(buf, "committed", committed);
        committedTotal += committed;
        final long max = usage.getMax();
        formatNumber(buf, "max", usage.getMax());
        final long score;
        if (max == -1 || used == -1) {
            score = 100;
        } else {
            maxTotal += max;
            score = 100L * used / max;
        }
        buf.append(",'score':'").append(score).append("%'");
        buf.append("},");
    }
    // totalisation
    buf.append("{");
    buf.append("'name':'Total','type':'TOTAL'");
    formatNumber(buf, "used", usedTotal);
    formatNumber(buf, "init", initTotal);
    formatNumber(buf, "committed", committedTotal);
    formatNumber(buf, "max", maxTotal);
    final long score = 100L * usedTotal / maxTotal;
    buf.append(",'score':'").append(score).append("%'");
    buf.append("}");
    buf.append("]");
    return buf.toString();
}

Example 13 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project felix by apache.

the class MemoryUsageSupport method printMemoryPools.

final void printMemoryPools(final PrintHelper pw) {
    final List<MemoryPoolMXBean> pools = getMemoryPools();
    for (MemoryPoolMXBean pool : pools) {
        final String title = String.format("%s (%s, %s)", pool.getName(), pool.getType(), (pool.isValid() ? "valid" : "invalid"));
        pw.title(title, 1);
        pw.keyVal("Memory Managers", Arrays.asList(pool.getMemoryManagerNames()));
        pw.keyVal("Peak Usage", pool.getPeakUsage());
        pw.keyVal("Usage", pool.getUsage());
        if (pool.isUsageThresholdSupported()) {
            pw.keyVal("Usage Threshold", String.format("%d, %s, #exceeded=%d", pool.getUsageThreshold(), pool.isUsageThresholdExceeded() ? "exceeded" : "not exceeded", pool.getUsageThresholdCount()));
        } else {
            pw.val("Usage Threshold: not supported");
        }
        pw.keyVal("Collection Usage", pool.getCollectionUsage());
        if (pool.isCollectionUsageThresholdSupported()) {
            pw.keyVal("Collection Usage Threshold", String.format("%d, %s, #exceeded=%d", pool.getCollectionUsageThreshold(), pool.isCollectionUsageThresholdExceeded() ? "exceeded" : "not exceeded", pool.getCollectionUsageThresholdCount()));
        } else {
            pw.val("Collection Usage Threshold: not supported");
        }
    }
}

Example 14 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project leopard by tanhaichao.

the class JvmManagement method printMemoryPool.

public static void printMemoryPool() {
    // 获取多个内存池的使用情况
    System.out.println("=======================MemoryPoolMXBean============================ ");
    List<MemoryPoolMXBean> mpmList = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean mpm : mpmList) {
        System.out.println("getUsage " + mpm.getUsage());
        System.out.println("getMemoryManagerNames " + StringUtils.join(mpm.getMemoryManagerNames(), ","));
    }
}

Example 15 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project qpid-broker-j by apache.

the class BrokerAttributeInjector method getInjectedAttributes.

@Override
public Collection<ConfiguredObjectInjectedAttribute<?, ?>> getInjectedAttributes() {
    List<ConfiguredObjectInjectedAttribute<?, ?>> attributes = new ArrayList<>();
    List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean memoryPoolMXBean : memoryPoolMXBeans) {
        String poolName = memoryPoolMXBean.getName().replace(" ", "");
        String attributeName = "jvmMemoryMaximum" + poolName;
        try {
            Method getMemoryPoolMaximum = BrokerAttributeInjector.class.getDeclaredMethod("getMemoryPoolMaximum", Broker.class, MemoryPoolMXBean.class);
            final ConfiguredObjectInjectedAttribute<?, ?> injectedStatistic = new ConfiguredDerivedInjectedAttribute<>(attributeName, getMemoryPoolMaximum, new Object[] { memoryPoolMXBean }, false, false, "", false, "", "Maximum size of memory pool " + memoryPoolMXBean.getName(), _typeValidator);
            attributes.add(injectedStatistic);
        } catch (NoSuchMethodException e) {
            LOGGER.warn("Failed to inject attribute '{}'", attributeName, e);
        }
    }
    return attributes;
}