# ControlLogix MSG (Class 3) Utilization Swings Widely, Why? **URL:** \ **Category:** Ignition\ **Created:** [March 6, 2024, 4:46pm UTC](https://forum.inductiveautomation.com/t/controllogix-msg-class-3-utilization-swings-widely-why/86910 "2024-03-06T16:46:01Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [March 6, 2024, 4:52pm UTC](https://forum.inductiveautomation.com/t/controllogix-msg-class-3-utilization-swings-widely-why/86910/2 "2024-03-06T16:52:35Z")
> [@Josh\_Connell](#): > > would be spaced out No, generally not. When it is time to do a particular poll, the messages are queued up. What you are seeing is normal. Leased groups are not as helpful as you might think if the leasing situation has parts of tags in both paces. Optimization is based on top level tags (controller tags and program tags). If leasing targets a specific top-level tag in more than one pace, you can actually **increase** the message load. Have you seen this topic (and the ones linked within) ? > [@Ignition & Logix Best Practice Tips for better communications](https://forum.inductiveautomation.com/t/ignition-logix-best-practice-tips-for-better-communications/60386): > > Hi All, After a whole bunch of issues I have gone down the rabbit hole of what is wrong with our setup on site. I will preface this by saying I a relatively new to all of this… so be gentle stuck_out_tongue Based on much reading(such wow) I believe I have a list of things our site could take away for a better system. Some of them are easy to implement, whilst some of them need… significant work to realize. Especially the AOI approach in point 5 expressionless Before going too far and up… --- _[View the full topic](https://forum.inductiveautomation.com/t/controllogix-msg-class-3-utilization-swings-widely-why/86910)._