John on "500 Internal Server Errors with DreamHost"

Using the Memory TCP plugin.
With plugins:
# Usage Sample: 34.23MB
# Peak Usage: 35.4MB
# All-Time: 78.44MB on 10/16/10 @ 4:03 am (shutdown)
# Load Averages: 0.55 0.76 0.77

Without (except WP SuperCache and the TCP Memory plugin):
# Usage Sample: 24.43MB
# Peak Usage: 24.66MB
# All-Time: 78.44MB on 10/16/10 @ 4:03 am (shutdown)
# Load Averages: 1.06 1.11 0.91

Can anyone translate that for me? Does it suggest about where the DreamHost process watcher is set at if I'm not getting 500s when the plugins are not running?
How does my memory usage compare to an average WP install?
Thanks!