I am looking at some memory profiling of monet database. 

Basically, the database size at disk is ~160 GB ( Although I am not very convinced with this big data size, there are 200M records with ~70 columns distributed among two big tables and several smaller ( relatively ) tables) . 

Right now, I have 64GB physical RAM dedicated machine for this database, but soon after firing queries on these tables ( with all sort of permutations on columns, but no joins between tables ), the memory is almost fully occupied, and resource crunch kills the performance.

Is there any utility, which shows which all columns are in-memory and what is the size? And better some setting through which I can guide which columns should remain in memory and which should immediately trimmed after query returns?

I am using windows 16 core machine on 64 bit architecture.

Regards,

Manish