Dual-Homing OMS/Microsoft Monitoring Agent (MMA) — Questions

Earlier this week, I posted on how the OMS/Microsoft Monitoring Agent (MMA) can be dual-homed for multiple OMS Workspaces.

A good question from the community came up (thank you @ Manoj Mathew), “Have you noticed any performance impacts on the Agents when they are multi homed to OMS?

In the OMS Query below — making use of OMS’ Log Analytics, I checked the performance data in the last 48 hours. Unfortunately I cannot go any further, since the MMA was deployed earlier in that day, and the second OMS workspace was added later that afternoon.

There are a few spikes in the Memory and CPU, but this is also a result of a few factors:

  • Initially there is a high level of CPU/Memory usage as OMS did its stuff when the MMA/OMS made friends and synced up their data/solutions
  • There is a small spike when the second OMS workspace was added but this is minimal at best
  • This server was being patched with 90+ Windows Server OS patches around 8PM.

The query I used to collect the data is here,

perfover48hours

Computer="COMPUTERNAME.FQDN" Type=Perf (CounterName="Available MBytes" OR CounterName="% Processor Time") (ObjectName=Memory OR ObjectName=Processor)

A second question being asked here is, “how many OMS Workspace IDs can be added to “dual-home” the MMA agent?

Unfortunately I only have 3 OMS Workspace’s to work with at the moment in this environment, but with that said, I can surely say a minimum of 3. If you have the ability to test more than 3, I would love to find out!

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8 thoughts on “Dual-Homing OMS/Microsoft Monitoring Agent (MMA) — Questions

  1. Were your test Servers also connected to an On- Prem SCOM Infra? I happen to notice CPU spikes & SCOM Alerts show up on a few of the servers.The spikes were linked to MMS Agent. Removed them from OMS & the CPU utilization came back to normal.

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