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AICadmin_2415's avatar
AICadmin_2415
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Nov 18, 2016
Solved

My LTM VE is running 2 TMM's but why? How do I determine what each TMM is for?

We have a 200 Mbps license for our LTM VE appliance. Occasionally we are exceeding our bandwidth limit and after some research I found the total bandwidth available is divided by the number of TMM's ...
application delivery
LTM
TMOS
  • M_Quevedo_64392's avatar
    M_Quevedo_64392
    Nov 19, 2016

    Each TMM (Traffic Management Microkernel) instance uses one vCPU so the BIG-IP can do more work by running two vCPU's in parallel. By default half of the connections are "disaggregated" to each TMM. This is a statistical multiplexing process. When there are many connections, system utilization will be balanced. If you have just one very busy connection then it may dominate the activity of the TMM handling it.

     

M_Quevedo's avatar
M_Quevedo
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Nov 19, 2016

Each TMM (Traffic Management Microkernel) instance uses one vCPU so the BIG-IP can do more work by running two vCPU's in parallel. By default half of the connections are "disaggregated" to each TMM. This is a statistical multiplexing process. When there are many connections, system utilization will be balanced. If you have just one very busy connection then it may dominate the activity of the TMM handling it.

 

AICadmin_2415's avatar
AICadmin_2415
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Nov 22, 2016

Okay so my LTM VE does has 2 vCPU's so as you said one TMM for each vCPU assigned to it.

 

Obviously, I don't think the appliance would run very well dropping my vCPU count just to increase my bandwidth throughput on a single TMM.

 

Thank you for the input! I wish I could have found a F5 kb article that explained that.