Sysevent

[SHARVIL SHETH]

sysevent table generates event of small local updates like for eg on Incident. changing of state or adding of work notes or additional comment or change of assign to person.

is it correct to have local updates in sysevent table?

[Ahmed Drar]

this is the table that you would see generated events. if you would like to create an event, you can use sysevent_register table

Thanks

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[SHARVIL SHETH]

is it correct to have local updates in sysevent table?

[Ahmed Drar]

I dont think its a good practise, unless there is issue you want remediate like for example event that hasn't processed for long period 

[Weird]

Those are probably OOB events which makes it correct behaviour.
You can check the sysevent_register table and see if the event in question has been created by admin, maint or any other servicenow account which would indicate that it's OOB event.

You might want to avoid flooding the event table at some point, but it shouldn't be a major issue even if there's a lot of traffic.