Querying expense and weak hashtables

[Daniel Drake <dsd gentoo org>]

Before I forget about this...

I've noted in the past that querying a lot is one way to bump up beagled's 
memory usage fairly easily.

There's a discussion going on at the dotLucene forums about a fairly serious 
memory problem in Lucene's field caching:

http://sourceforge.net/forum/forum.php?thread_id=1378460&forum_id=408004

The java Lucene uses a WeakHashMap:
http://java.sun.com/j2se/1.4.2/docs/api/java/util/WeakHashMap.html

There isn't a direct equivalent in C# so a Hashtable is used, which doesn't 
have the same characteristics.

This is worth keeping an eye on...

Daniel