# 7.9.5 High Cpu Usage **URL:** \ **Category:** Ignition\ **Created:** [January 28, 2022, 3:54pm UTC](https://forum.inductiveautomation.com/t/7-9-5-high-cpu-usage/55489 "2022-01-28T15:54:05Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![RonB](https://avatars.discourse-cdn.com/v4/letter/r/ce73a5/32.png) [@RonB](https://forum.inductiveautomation.com/u/RonB)\ **Post date:** [January 28, 2022, 3:54pm UTC](https://forum.inductiveautomation.com/t/7-9-5-high-cpu-usage/55489/1 "2022-01-28T15:54:05Z")
Usage was staying between 80-99%, which began two days ago. Nothing has been changed (that I’m aware of since December). So far, in the forum I found where it may be helpful to add a line to the Garbage Collector adding a slight pause and reducing the frequency of operation. (I will do this tomorrow as its in a production environment) I have tried to look at the logs, but not sure exactly how to run down each item as the web portal shows gateway-shared-exec-engine-8, id=55 (not just this one, but there are several different listings that show “blocked” Also, MVStore background writer was using almost 20%. Then disappeared. I will upload the wrapper log, thread dump, and config. Several devices have been disabled as they were faulted and usage has dropped some, but I would like to see it much lower. Any help would be greatly appreciated. [dump.zip](https://forum.inductiveautomation.com/uploads/short-url/1A0BjNEQfEmhqT5TOQAgmY2AamR.zip) (17.2 KB) [wrapper.log](https://forum.inductiveautomation.com/uploads/short-url/5knJ2VlVI5qV8V2TK6y0bZV3Ify.log) (2.3 MB) ---
**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\ **Post date:** [January 28, 2022, 4:23pm UTC](https://forum.inductiveautomation.com/t/7-9-5-high-cpu-usage/55489/2 "2022-01-28T16:23:52Z")
If you’re already planning on downtime, I would **strongly** recommend upgrading to the latest 7.9. 7.9.5 is _years_ old, and has many bugs of varying severity. ---
**Author:** ![RonB](https://avatars.discourse-cdn.com/v4/letter/r/ce73a5/32.png) [@RonB](https://forum.inductiveautomation.com/u/RonB)\ **Post date:** [January 28, 2022, 4:28pm UTC](https://forum.inductiveautomation.com/t/7-9-5-high-cpu-usage/55489/3 "2022-01-28T16:28:45Z")
I don’t get the final say, unfortunately. I was called over a few issues back in October with the portal showing “internal error” after clicking on anything on the page. It would work for 1-2 clicks, then Internal Error. I recommended that they upgrade then based on advise here, but they obviously did not listen to the warning/advice. 🙂 I will lobby for the upgrade, but expecting the worst I’ll keep looking for an answer. -Forgot to include in my original post that most of the usage is in the “Unclassified” section. Devices/tags/web are using less than 15-20%. ---
**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:** [January 28, 2022, 4:48pm UTC](https://forum.inductiveautomation.com/t/7-9-5-high-cpu-usage/55489/4 "2022-01-28T16:48:58Z")
Your thread dump shows an astonishing number of socket connections and netty event loops for drivers burning CPU (runnable state). I recall seeing this once. Pretty sure it was a netty bug. You need to upgrade. Note that there’s never any “hot-patch” or similar bug handling for Ignition. Fixes for confirmed bugs will always require upgrading.