I'm trying to diagnose a java.lang.OutOfMemoryError: PermGen Space error when running on Sun's Hotspot JVM, and would like to know how much PermGen space my program is using at various points. Is there a way of finding out this information programmatically?
我正在尝试在Sun的Hotspot JVM上运行时诊断java.lang.OutOfMemoryError:PermGen Space错误,并且想知道我的程序在各个点使用了多少PermGen空间。有没有办法以编程方式查找此信息?
2 个解决方案
#1
You can use something like this:
你可以使用这样的东西:
Iterator<MemoryPoolMXBean> iter = ManagementFactory.getMemoryPoolMXBeans().iterator();
while (iter.hasNext())
{
MemoryPoolMXBean item = iter.next();
String name = item.getName();
MemoryType type = item.getType();
MemoryUsage usage = item.getUsage();
MemoryUsage peak = item.getPeakUsage();
MemoryUsage collections = item.getCollectionUsage();
}
This will give you all types of memory. You are interested in "Perm Gen" type.
这将为您提供所有类型的内存。您对“Perm Gen”类型感兴趣。
#1
You can use something like this:
你可以使用这样的东西:
Iterator<MemoryPoolMXBean> iter = ManagementFactory.getMemoryPoolMXBeans().iterator();
while (iter.hasNext())
{
MemoryPoolMXBean item = iter.next();
String name = item.getName();
MemoryType type = item.getType();
MemoryUsage usage = item.getUsage();
MemoryUsage peak = item.getPeakUsage();
MemoryUsage collections = item.getCollectionUsage();
}
This will give you all types of memory. You are interested in "Perm Gen" type.
这将为您提供所有类型的内存。您对“Perm Gen”类型感兴趣。