使用CruiseControl时的版本控制服务器性能（StarTeam或替代品）

We are using CruiseControl with a StarTeam server and having problems with the StarTeam server crashing. We are wondering if we are hitting the server too hard. Across 3 CruiseControl machines and a total of about 30 projects, we are logging into StarTeam and checking for modifications every minute or so. Most of our projects have ~20,000 files in them. Does anyone have experience with the performance limitations in this type of a scenario with StarTeam? We are using CruiseControl with a StarTeam serv