what in regionserver's Used Heap

[sunweiwei]

Hi

 

I'm using hbase0.96.

 

In hbase web, I see :

Max Heap is 16.0 G

Memstore Size is 208.6 M

Cache Size is  138M

Cache Free is 6.2G

 

And Used Heap is 10.2 G.

 

Used Heap is  large.  I want to know  what   could be  in  then Used Heap.

 


Thanks.