SourceOne Journalling speed, throughput

SourceOne Version 6.8.1.1073, Exchange2010, SQL 2008

Hi

I'm new to sourceone and have inherited a preconfigured system so I'm trying to gather some baseline performance stats so I can tell whether I'm improving things or making them worse.

As part of that I've been monitoring how quickly the Journalling activity is dealing with emails from the Journal mailbox.

In a sustained 8 hour Jounal activity it  dealt with around 46000 emails, equivallent to about 1.5 emails per second

Average email size in the Journal mailbox is about 70KB

I understand that there are a lot of variables to affect this ranging from hardware , networks, configuration etc but does anyone have any similar baseline data I can compare this to.

I'm just trying to get a high level view of whether journaling 1.5 emails per second is good, bad or indifferent as at the moment the journal mailbox fills up quicker than the Journal activity can empty it.

I would appreciate any input no matter how un-scientifically it was obtained, even just rough guesses would be useful.

Thanks