Sizing benchmarks

Hi, I was wondering is there any guidance or rules of thumb for setting the parameters (database size, number of simultaneous users) of benchmarks in MonetDB in relation to system properties (RAM, CPU, Disk, Network)? Specifically I'm looking to run microbenchmarks with TPC-H, looking at performance of each query in isolation, so for my setup a RAM vs database size relationship is probably most important. (This is to evaluate the impact of intra-query checkpointing capabilities I've added to a modified version of MonetDB as part of my PhD work.) Thanks, ~ Daniel.