data caching

Hi,

I would like to make some appliction which takes data from sap. Loading of data takes a lot of time so i decided to cache that data. I put data in some static class to do this.

Is this solution right or is there any other possibility? Does sb. know how is it implemented in MSS teamView iView?

How can i count usage of memory-i have a collection about 10000 object, each object has 5 Strings(av.length about 40chars), and a Vector which links otherobject in this collection?

thanks

JJ