How to take COLD RUNs Execution time

as a part of my project, i have to check the performance of monetdb column-store database. I am very new to this technology, so i dont know where the monetdb caches its previous query results..

I want to know how can i take results for cold runs on monetdb ( i have tried closing monetdb client and server every time i fire a query , but doesnt seem to clear the cache and i always get hot runs result). I am using window 8 core i5 2.5GHz machine.

so please can anyone help me regarding these.... suggestions are appreciated..

thanks in advance..

Prashant Rajkotiya M.tech. (ICT) DA-IICT ,Gandhinagar