What thresholds can be used to monitor memory utilization of LTM

We have 10 LTM boxes installed in our environment of model number 1600/3400. Currently running on 10.2.4 build 577 version. We are facing some memory issues. So we are planning to monitor the memory utilization of boxes. We have nagios in our environment. We did configure those monitors but not looks good. Can you please let me know what threshold should we use to monitor memory for warning and critical.

from the datasheet here and here, the 3400 has 1GB base memory, and 1600 should be has 4GB Mem.

F5 has native dashboard monitoring that could monitor memory as well. I believe this native performance monitoring is good enough.

Not sure if I understand your question well, but to set thresholds on your nagios, I've heard that nagios has a plugin to set this. This is some example how to do it.

hope this helps.