Performance of Network Monitoring in SCOM 2012 SP1

Question

Hi all!
I´ve problems with performance of the network monitoring feature in SCOM 2012 SP1.
According to the
guide the following should be adeqate:
•1000 network devices (approximately 12,500 monitored ports) managed by a resource pool that has three or more management servers
•500 network devices (approximately 6,250 monitored ports) managed by a resource pool that has two or more gateway servers
We have 800 network devices with a total of 24000 ports,
BUT only 1500 of them are monitored. This is basically what happens automatically after discovery, since only ports between monitored devices are monitored by default.
For this setup I first used only one management server dedicated to the Network Pool,
based on my assumption that if two servers could monitor 6250 ports, one server would be more than enough for 1500. I found this configuration working very poorly so I added another server. I now have two servers
dedicated for the Network Resource Pool. (They are NOT members of the “All management servers resource pool”)
Still, I get constant alerts regarding Health Services Private Bytes on these servers. They vary between 1-2Gbytes. Furthermore, if one of the servers goes offline, the network devices that was monitored by that server becomes grey for
several hours. Even if the server only is rebooted it takes forever to get everything online and green again.
I don´t really know what I should do now. I had a plan to replace our current network monitoring system (SNMPc) which easily handles this load on only one server. They are of course completely different beasts, but still. SCOM seems to
require a massive back-end to produce equivalent real life results.
Any suggestions or reflections from the field are highly appreciated!
Regards
Peter

Answer 1

Hi,
Try to overide the monitor Health Services Private Bytes by the following steps.
◾Go Authoring space – Management Pack Objects – Monitors
◾Go to change scope – select clear all – look for Health Service – tick it and press OK.
◾Expand Health Service – expand Entity Health – expand Performance – expand Health Service Performance
◾Select the Health Health Service Private Bytes Threshold.
◾Right click the mouse and choose to overide the monitor for a group
◾Select the group called Management Server Computer Group and press OK
◾Select the Agent Performance Monitor Type – Threshold and change the value 104857600 to ex. 2610612736.
◾Select to store the overide in a management pack you have created and press OK
Juke Chou
TechNet Community Support