Memory Consumption of MT4 Terminal

 
I am running my EA at a win server 2008 VPS. The weird thing is the memory consumption is about 400MB when the terminal started but slowly reduced to 30MB after some time. I have tried to reproduce the same result with same terminal/EA setting but the memory consumption stays the same at my home pc (win 8).

So, my question is why is this happens? How could I reproduce the same result?

Thanks.
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