Monitor BizTalk Host Queue length and suspended msgs w/SCOM

First, I hope the BizTalk forum is the right place to ask this. Maybe I should try the SCOM forum as well.
I'm trying to create two monitors (Not rules, as we want the alert to be automatically healthy when under treshold again and we want to see the status state as well) in SCOM based on performance counters for BizTalk Msgbox Host Queue Length and suspended
msgs. My question is what I should use as target (class) in SCOM? And can I use "All instances" of the counter or must i create a monitor for each instance (This is a lot of work and not very dynamic)? We want to monitor all the instances/hosts with
different tresholds, so the first thing I did was to target the "BizTalk Host" class, so I can do overrides to different hosts.
The problem with this is it will generete a alert for all hosts if one instance is over treshold. I also tried to target the "Run-time role", and this actually works better, but not perfect as i cannot set a treshold for just one instance/host
then and it will close the alert if any other intance is under treshold.
Anyone have experiences with SCOM and monitoring Hosts queues and/or suspended msgs as monitors?
thank you in advance for all suggestions!

I would suggest to look into spool table and its size . As per recommendation it count should not be greater than 3000 per server .
Its easy way to monitor the performance counter "Message Box:General Counters /Spool size".you can execute one the following SQL in the BizTalk message box database.
You can have a counter for spool table size and manually you can use below sql query to find out the count.
SELECT count(*) from SPOOL WITH (NOLOCK)
SELECT top 1 rows FROM sys.partitions WHERE object_id = object_id(‘spool’)
Note :The NOLOCK keyword is important in first query, you don’t want to put any locks in the spool table while measuring the row count. The second query is the one used by the performance counter “Spool Size” using the stored procedure
“MsgBoxPerfCounters_GetSpoolSize”
Reference :http://msdn.microsoft.com/en-us/library/aa561922.aspx
Thanks
Abhishek

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Monitor BizTalk Host Queue length and suspended msgs w/SCOM

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