Re: Memory Leak Problem

Lew <>
Tue, 13 May 2008 09:15:25 -0400
<> wrote:

 I have a crawler program, it fetches html on the internet and a
parser will parse the page.
 Because of slow networks, I use many robots to crawl the pages and
one parser.
 The program is multi-threaded.
There is a pagestore object used as the bridge between robot and
parser, it's has a List structure,
the parser will remove the item it has parsed.

 But as the program runs, its memory keep on inscreasing. I don't know
why. What I see in the taskmgr shows that most memory is in the
virtual memory, and the actual memory occupation is not much.

So what could possibly be the reasons?

First, regarding that "its memory keep[s] on increasing", how are you
measuring this?

It is normal for Java programs' memory usage to increase up to a point. Up to
what point does the memory increase? Does the program ever throw an

How much memory are you allowing the program to take? It is normal for Java
programs to appear to the operating system to have all their permitted
allocation. It is normal for Java programs' heap to be near the -Xmx value

It is a common and recommended Java idiom to create gobs of very short-lived


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