/JVM/activeThreads.value shows 600+ active threads but stack dump shows 62

In our production environment the dmstool reports 600+ active threads in our JVM but when I do a stack dump the number of threads adds up to 62. Is this normal? I would have thought that the stack dump would have shown the same number of threads (600) that the dmstool reported.
In addition, the number of threads reported by the dmstool does not decrease much during non business hours. In fact, over multiple days it continues to grow. As it grows to this number, users report slower than normal response times throughout the application, although all functionality continues to work (no hanging). Could these 'missing' threads impact performance?
Thank you

jmap tool can print heap usage from core file.
Ex:
jmap -heap /your/jdk/java core.file
For more info about jmap take a look at this.
http://java.sun.com/j2se/1.5.0/docs/tooldocs/share/jmap.html

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I describe how you fix it here
https://discussions.apple.com/message/21995208#21995208

/JVM/activeThreads.value shows 600+ active threads but stack dump shows 62

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