本文整理匯總了Java中java.lang.management.MemoryPoolMXBean.isUsageThresholdSupported方法的典型用法代碼示例。如果您正苦於以下問題：Java MemoryPoolMXBean.isUsageThresholdSupported方法的具體用法？Java MemoryPoolMXBean.isUsageThresholdSupported怎麽用？Java MemoryPoolMXBean.isUsageThresholdSupported使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類java.lang.management.MemoryPoolMXBean的用法示例。
在下文中一共展示了MemoryPoolMXBean.isUsageThresholdSupported方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: main
import java.lang.management.MemoryPoolMXBean; //導入方法依賴的package包/類
public static void main(String[] args) {
List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
boolean verified = false;
for (MemoryPoolMXBean i : pools) {
if ((i.getUsage().getMax() >= TWO_G)
&& i.isUsageThresholdSupported()) {
i.setUsageThreshold(TWO_G);
if(i.getUsageThreshold() != TWO_G)
throw new RuntimeException("Usage threshold for"
+ " pool '" + i.getName() + "' is " + i.getUsageThreshold()
+ " and not equal to 2GB");
verified = true;
}
}
System.out.println("Ability to use big heap thresholds has "
+ (verified ? "" : "NOT ") + "been verified");
}
示例2: findPool
import java.lang.management.MemoryPoolMXBean; //導入方法依賴的package包/類
private static MemoryPoolMXBean findPool()
{
MemoryPoolMXBean ret = null;
for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
if (pool.getType() == MemoryType.HEAP && pool.isUsageThresholdSupported()) {
ret = pool;
}
}
// we do something when we reached 99.9% of memory usage
// when we get to this point gc was unable to recover memory.
ret.setCollectionUsageThreshold((long) Math.floor(ret.getUsage().getMax() * 0.999));
return (ret);
}
示例3: doMemoryPoolMXBeanTest
import java.lang.management.MemoryPoolMXBean; //導入方法依賴的package包/類
private final int doMemoryPoolMXBeanTest(MBeanServerConnection mbsc) {
int errorCount = 0 ;
System.out.println("---- MemoryPoolMXBean") ;
try {
ObjectName filterName =
new ObjectName(ManagementFactory.MEMORY_POOL_MXBEAN_DOMAIN_TYPE
+ ",*");
Set<ObjectName> onSet = mbsc.queryNames(filterName, null);
for (Iterator<ObjectName> iter = onSet.iterator(); iter.hasNext(); ) {
ObjectName memoryPoolName = iter.next() ;
System.out.println("-------- " + memoryPoolName) ;
MBeanInfo mbInfo = mbsc.getMBeanInfo(memoryPoolName);
errorCount += checkNonEmpty(mbInfo);
System.out.println("getMBeanInfo\t\t" + mbInfo);
MemoryPoolMXBean memoryPool = null;
memoryPool =
JMX.newMXBeanProxy(mbsc,
memoryPoolName,
MemoryPoolMXBean.class,
true) ;
System.out.println("getCollectionUsage\t\t"
+ memoryPool.getCollectionUsage());
System.out.println("getMemoryManagerNames\t\t"
+ Arrays.deepToString(memoryPool.getMemoryManagerNames()));
System.out.println("getName\t\t"
+ memoryPool.getName());
System.out.println("getPeakUsage\t\t"
+ memoryPool.getPeakUsage());
System.out.println("getType\t\t"
+ memoryPool.getType());
System.out.println("getUsage\t\t"
+ memoryPool.getUsage());
System.out.println("isValid\t\t"
+ memoryPool.isValid());
boolean supported = memoryPool.isUsageThresholdSupported() ;
System.out.println("isUsageThresholdSupported\t\t"
+ supported);
if ( supported ) {
System.out.println("getUsageThreshold\t\t"
+ memoryPool.getUsageThreshold());
System.out.println("isUsageThresholdExceeded\t\t"
+ memoryPool.isUsageThresholdExceeded());
System.out.println("getUsageThresholdCount\t\t"
+ memoryPool.getUsageThresholdCount());
}
supported = memoryPool.isCollectionUsageThresholdSupported() ;
System.out.println("isCollectionUsageThresholdSupported\t\t"
+ supported);
if ( supported ) {
System.out.println("getCollectionUsageThreshold\t\t"
+ memoryPool.getCollectionUsageThreshold());
System.out.println("getCollectionUsageThresholdCount\t\t"
+ memoryPool.getCollectionUsageThresholdCount());
System.out.println("isCollectionUsageThresholdExceeded\t\t"
+ memoryPool.isCollectionUsageThresholdExceeded());
}
memoryPool.resetPeakUsage();
}
System.out.println("---- OK\n") ;
} catch (Exception e) {
Utils.printThrowable(e, true) ;
errorCount++ ;
System.out.println("---- ERROR\n") ;
}
return errorCount ;
}