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

Example 21 with MemoryPoolMXBean

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

the class HeapMemoryMonitor method getAllMemoryPoolNames.

/**
   * Returns the names of all available memory pools as a single string.
   */
private static String getAllMemoryPoolNames() {
    StringBuilder builder = new StringBuilder("[");
    for (MemoryPoolMXBean memoryPoolBean : ManagementFactory.getMemoryPoolMXBeans()) {
        builder.append("(Name=").append(memoryPoolBean.getName()).append(";Type=").append(memoryPoolBean.getType()).append(";UsageThresholdSupported=").append(memoryPoolBean.isUsageThresholdSupported()).append("), ");
    }
    if (builder.length() > 1) {
        builder.setLength(builder.length() - 2);
    }
    builder.append("]");
    return builder.toString();
}

Example 22 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project Lucee by lucee.

the class MacAddressWrap method getMemoryUsageCompact.

public static Struct getMemoryUsageCompact(int type) {
    java.util.List<MemoryPoolMXBean> manager = ManagementFactory.getMemoryPoolMXBeans();
    Iterator<MemoryPoolMXBean> it = manager.iterator();
    MemoryPoolMXBean bean;
    MemoryUsage usage;
    MemoryType _type;
    Struct sct = new StructImpl();
    while (it.hasNext()) {
        bean = it.next();
        usage = bean.getUsage();
        _type = bean.getType();
        if (type == MEMORY_TYPE_HEAP && _type != MemoryType.HEAP)
            continue;
        if (type == MEMORY_TYPE_NON_HEAP && _type != MemoryType.NON_HEAP)
            continue;
        double d = ((int) (100D / usage.getMax() * usage.getUsed())) / 100D;
        sct.setEL(KeyImpl.init(bean.getName()), Caster.toDouble(d));
    }
    return sct;
}

Example 23 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project checker-framework by typetools.

the class SourceChecker method printStats.

/**
 * Print resource usage statistics
 */
protected void printStats() {
    List<MemoryPoolMXBean> memoryPools = ManagementFactory.getMemoryPoolMXBeans();
    for (MemoryPoolMXBean memoryPool : memoryPools) {
        System.out.println("Memory pool " + memoryPool.getName() + " statistics");
        System.out.println("  Pool type: " + memoryPool.getType());
        System.out.println("  Peak usage: " + memoryPool.getPeakUsage());
    }
}

Example 24 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project Payara by payara.

the class MemoryReporter method getMemoryPoolReport.

private String getMemoryPoolReport() {
    final StringBuilderNewLineAppender sb = new StringBuilderNewLineAppender(new StringBuilder());
    final long millis = rmbean.getUptime();
    final String uptime = sm.getString("uptime", JVMInformationCollector.millis2HoursMinutesSeconds(millis));
    sb.append(uptime);
    for (final MemoryPoolMXBean m : pools) {
        final String n = m.getName();
        sb.append(sm.getString("memory.pool.name", n));
        MemoryUsage mu = m.getUsage();
        sb.append(mu2String(mu));
    }
    return (sb.toString());
}

Example 25 with MemoryPoolMXBean

use of java.lang.management.MemoryPoolMXBean in project oap by oaplatform.

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;
        }
    };
}