# Performance issues since 8.1.21 upgrade **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [October 17, 2022, 2:56pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284 "2022-10-17T14:56:43Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Yvain17](https://avatars.discourse-cdn.com/v4/letter/y/977dab/32.png) [@Yvain17](https://forum.inductiveautomation.com/u/Yvain17)\ **Post date:** [October 17, 2022, 2:56pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/1 "2022-10-17T14:56:43Z")
Ever since I upgraded to 8.1.21 a week ago I have been having performance issues system wide. I upgraded from 8.1.2. System Info: My ignition VM has 16GB of RAM (gateway is only allocated 8GB) and has 8 virtual processors. mySQL VM has 16GB of RAM and 4 virtual processors. The physical server is only a few years old and is pretty high end. 64GB RAM Intel Xeon Gold 6244 (2x) RAID 5 configuration with SAS SSD drives. 7x drives in the RAID with a few hot spares. Things I have noticed: Disk utilization is extremely high all the time (80% or more) System response time is flickers between 1ms and 1000-2000ms. Clicking through my screens and performing normal tasks are slow. My CPU usage looks okay. Before the upgrade I averaged 12% CPU usage. After upgrade it sits around 22% give or take 4%. My logfile maintenance thread has been using about 10% CPU on average so this may be the culprit. Memory profile is also slightly different. I allocate 8192MB of memory to the gateway. Before the upgrade I had a very consistent sawtooth pattern. The heap would usually go up to 5-5.5 GB and then after garbage collection I would drop to 1.8-2.0 GB. After the upgrade I usually go up to 6-6.2 GB and still drop down to the same 1.8-2.0 GB. There is still a sawtooth pattern. Pretty much right after I upgraded Ignition I also put in a new PLC which has its own OPC-UA server. That is the only other thing that I changed externally. Can answer any other questions to help figure this out. The disk utilization being very high and logfile maintenance using 10% CPU seem to be the main issues (at least I think). ---
**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:** [October 17, 2022, 4:34pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/2 "2022-10-17T16:34:03Z")
You should probably contact [Support](https://support.inductiveautomation.com). This forum is not an official support venue. ---
**Author:** ![jlandwerlen](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jlandwerlen](https://forum.inductiveautomation.com/u/jlandwerlen)\ **Post date:** [October 17, 2022, 4:36pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/3 "2022-10-17T16:36:53Z")
I would also recommend not upgrading a production system without first testing in a "test" environment. ---
**Author:** ![Yvain17](https://avatars.discourse-cdn.com/v4/letter/y/977dab/32.png) [@Yvain17](https://forum.inductiveautomation.com/u/Yvain17)\ **Post date:** [October 17, 2022, 5:50pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/4 "2022-10-17T17:50:26Z")
I just talked to support and I believe the issues are resolved. Just wanted to put it on here as well beforehand. ---
**Author:** ![Yvain17](https://avatars.discourse-cdn.com/v4/letter/y/977dab/32.png) [@Yvain17](https://forum.inductiveautomation.com/u/Yvain17)\ **Post date:** [October 17, 2022, 5:52pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/5 "2022-10-17T17:52:23Z")
Normally, yes, but I have a unique situation where no clients will be using the system for a while. ---
**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:** [October 17, 2022, 6:49pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/6 "2022-10-17T18:49:06Z")
> [@Yvain17](#): > > I believe the issues are resolved Might help others if you can share what resolved your case. ---
**Author:** ![Yvain17](https://avatars.discourse-cdn.com/v4/letter/y/977dab/32.png) [@Yvain17](https://forum.inductiveautomation.com/u/Yvain17)\ **Post date:** [October 17, 2022, 7:51pm UTC](https://forum.inductiveautomation.com/t/performance-issues-since-8-1-21-upgrade/65284/7 "2022-10-17T19:51:36Z")
A few months ago I was having problems with gateway crashes. I narrowed it down to problems with my easy charts. In my logback.xml file I increased the amount of logs I was keeping by A LOT in order to figure out and resolve the problem. Because it never noticeably affected my performance, I never changed it back. I lowered the amount of logs I was keeping when talking with support and it helped tremendously. Unfortunately, my disk utilization is still hovering around 80% and that problem is yet to be solved.