# ClockDrift Warning **URL:** \ **Category:** Ignition\ **Tags:** ignition79, vision\ **Created:** [February 1, 2022, 11:48am UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594 "2022-02-01T11:48:33Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 1, 2022, 11:48am UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/1 "2022-02-01T11:48:33Z")
![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/4/1/415aa69436143d092429e003f243777c12f4bf2f.png) I am getting warning for clock drift in my logger. I went through couple of forum answers but didn’t really understood the cause of this warning. PS: I have SQL Tags updating every 1 second/5 Seconds, do it really have to do with this warnings? Regards, Richita Pandey. ---
**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:** [February 1, 2022, 1:01pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/2 "2022-02-01T13:01:38Z")
That’s likely a garbage collection “pause-the-world”. When happening so fast, that suggests you haven’t given your gateway enough memory to work with (set in ignition.conf and restart). Show your gateway’s Performance Status page. ---
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 1, 2022, 1:18pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/3 "2022-02-01T13:18:32Z")
![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/0/609a42c7b94db195f0cc7fed293bdeda8eb86db2.png) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 1, 2022, 1:28pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/4 "2022-02-01T13:28:54Z")
Seems like plenty of memory… Is this 7.9 or 8.x? Might be worth making sure G1GC is being used if it’s 7.9. What’s the hardware here? Sustained CPU usage seems maybe a little high without justification. ---
**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:** [February 1, 2022, 1:30pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/5 "2022-02-01T13:30:51Z")
(Tagged 7.9) Also ensure G1GC has a maximum pause milliseconds target. I recommend 100ms, as the default is 1 second. That doesn’t play well with the 1 second clock drift detector. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 1, 2022, 1:32pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/6 "2022-02-01T13:32:19Z")
Pretty sure the default has always been 200ms, not 1s. @Richita_Pandey if you can upload your `ignition.conf` file that would help. ---
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 1, 2022, 1:54pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/7 "2022-02-01T13:54:11Z")
I don’t have the access to that ingition.conf file. If you can guide me to check few config setting, I can check with team to get that details. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 1, 2022, 1:56pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/8 "2022-02-01T13:56:06Z")
Interested in the contents of the section that looks something like this: ```auto # Java Additional Parameters wrapper.java.additional.1=-XX:+UseConcMarkSweepGC wrapper.java.additional.2=-XX:+CMSClassUnloadingEnabled wrapper.java.additional.3=-Ddata.dir=data wrapper.java.additional.4=-Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false #wrapper.java.additional.5=-Xdebug #wrapper.java.additional.6=-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 ``` ---
**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:** [February 1, 2022, 2:34pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/9 "2022-02-01T14:34:40Z")
> [@Kevin.Herron](#): > > Pretty sure the default has always been 200ms, not 1s. I stand corrected. Now I'm going to wonder how I mislearned that. /: ---
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 2, 2022, 6:01am UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/10 "2022-02-02T06:01:41Z")
```auto # Java Additional Parameters wrapper.java.additional.1=-XX:+UseG1GC wrapper.java.additional.2=-XX:MaxGCPauseMillis=100 wrapper.java.additional.3=-XX:+CMSClassUnloadingEnabled wrapper.java.additional.4=-Ddata.dir=data wrapper.java.additional.5=-Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false #wrapper.java.additional.6=-Xdebug #wrapper.java.additional.7=-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 # Initial Java Heap Size (in MB) wrapper.java.initmemory=1024 # Maximum Java Heap Size (in MB) wrapper.java.maxmemory=16384 ``` ---
**Author:** ![Adriaan.leRoux](https://avatars.discourse-cdn.com/v4/letter/a/bbce88/32.png) [@Adriaan.leRoux](https://forum.inductiveautomation.com/u/Adriaan.leRoux)\ **Post date:** [February 2, 2022, 6:12am UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/11 "2022-02-02T06:12:25Z")
Are you running Ignition on a VM perhaps? ---
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 2, 2022, 6:19am UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/12 "2022-02-02T06:19:55Z")
No, its running on windows server OS ---
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 2, 2022, 1:10pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/13 "2022-02-02T13:10:54Z")
I believe this is what you are looking for. @Kevin.Herron ```auto # Java Additional Parameters wrapper.java.additional.1=-XX:+UseG1GC wrapper.java.additional.2=-XX:MaxGCPauseMillis=100 wrapper.java.additional.3=-XX:+CMSClassUnloadingEnabled wrapper.java.additional.4=-Ddata.dir=data wrapper.java.additional.5=-Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false #wrapper.java.additional.6=-Xdebug #wrapper.java.additional.7=-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000 # Initial Java Heap Size (in MB) wrapper.java.initmemory=1024 # Maximum Java Heap Size (in MB) wrapper.java.maxmemory=16384 ``` ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 2, 2022, 1:25pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/14 "2022-02-02T13:25:23Z")
Yep, that looks fine. Not sure what else you can do. Call support and have them help you figure out why the CPU usage is constantly \>30% maybe? That may very well be fine, but it’s worth looking at to be sure. ---
**Author:** ![Richita\_Pandey](https://avatars.discourse-cdn.com/v4/letter/r/6bbea6/32.png) [@Richita\_Pandey](https://forum.inductiveautomation.com/u/Richita_Pandey)\ **Post date:** [February 2, 2022, 1:27pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/15 "2022-02-02T13:27:01Z")
Thank you @Kevin.Herron . Just curious to know if this issue can arise if we have network issue for some time? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 2, 2022, 1:27pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/16 "2022-02-02T13:27:36Z")
That shouldn’t matter, and your CPU usage and memory pattern seem very consistent. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 2, 2022, 1:28pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/17 "2022-02-02T13:28:45Z")
Aside from the longer pauses your system looks fine. Longer pauses like that are usually only seen on crappy hardware or when running in a virtual machine. ---
**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\ **Post date:** [February 2, 2022, 2:28pm UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/18 "2022-02-02T14:28:50Z")
How much RAM does the server have? Is Ignition the only software running on this machine (e.g. database, designer, client, etc…) ---
**Author:** ![josborn](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@josborn](https://forum.inductiveautomation.com/u/josborn)\ **Post date:** [February 8, 2022, 12:07am UTC](https://forum.inductiveautomation.com/t/clockdrift-warning/55594/19 "2022-02-08T00:07:23Z")
This may or may not be relevant, I recently discovered that vulnerability scanning can spike CPU usage dramatically and cause clock drifts. In my case it was a daily Nessus scan, adding a 2nd CPU resolved it for me.