Monitoring Exchange 2007 SCR with Ops Mgr 2007

February 4, 2009 · Filed Under Exchange Server 2007, Operations Manager | 561 views

I was a bit surprised to see that the most recent Management Pack for Exchange Server 2007 for Operations Manager 2007 didn’t understand the differences between CCR and SCR…and how those differences would impact the log queue depths for replication. So, if you’re going to implement SCR (or you already did), be sure to override the thresholds for the following monitors for your SCR targets:

MSExchange Replication: ReplayQueueLength - sustained for 5 minutes - Red(>15)
MSExchange Replication: ReplayQueueLength - sustained for 5 minutes - Yellow(>7).

Since the replay queue length is always going to be rather large due to the nature of how SCR operates (this value will never be less than 50 logs and will almost always be more than that), you’ll need to determine what the normal values of the replay queue depth are for your SCR targets. As an example, I have two SCR targets (from CCR sources) that routinely have replay queue depths of 300 - 400 logs with just a 1 hour ReplayLagTime value configured! See this TechNet article for more information configuring SCR.

I’d suggest making your “yellow” value at least 100 above your normal average replay queue depth and your “red” value at least 250 - 350 above your normal average. Make your overrides on the specific mailbox servers that are your SCR targets…not at the global level.