High memory usage from TMM
I've been experiencing some weird issues on my LTM HA cluster. Whenever I make a config change through Web Admin or CLI (using b load), it see a hundred or so monitors flap up and down. The flapping only occurs on my active unit. If I make similar changes on the standby unit, I don't see any flapping. I've also failed over to the secondary unit and confirmed that it has the same issue. Increasing the timeouts to around 4 or 5 times the interval seems help, but I don't want to wait for 4-5 failures before a member is marked down.
I don't know when this issue started so I can't really associate it with a specific config change. We use our LTMs as a shared appliance to provide load balancing and redundancy to our enterprise customers. We don't do much with iRules other than pointing a hostname or URI to a specific member.
So far, I've done the following:
1. full_box_reboot on each unit
2. ran EUD - both came back clean
3. upgraded from 9.4.6 to 9.4.8 HF4
The host memory is pretty much maxed out at any given time on our active and standby units, so I don't think it is a bad iRule. I see the following process (ps -aux) on both units using ~40% CPU and ~80% memory:
/bin/tmm -m -s 1556 --command=rtc_frequency 4096
Has anyone had similar problems? Does anyone know what that process is?