Facing issue in 800xA..System Message Server.. Allmost 2 wweks before customer informed us that System Message Service is not healthy. Same made healthy after deleting and again adding resepctive Services. Today morning, again customer informed that System Message Service becomes unhealthy (in Sync State). Any thought will help to look from different prespective.
This immediate section below applies to 800xA version 4 or older (before System Message service was renamed to Event Storage service). Do NOT use the below if you see an Event Storage service, then jump to version 5 section.
Check event storage class settings - 10.000 (default) up to 50.000 events per event category is permitted. A too large setting could make the storage unreliable.
If you are experienced, you can also delete the System Message service itself (service object) and give rebirth to it (with factory default settings) by double clicking the corresponding .sdd file in C:\...\PPA\sdd\... and setup one group and maximum two providers (for AS1 and AS2 but not for AS3).
When version 5 came out, the System Message service was renamed to Event Storage. The old service name was taken by a new function that emits diagnostic events from the system itself. The new service is also responsible for emitting audit events. If you are at version 5 or later, check your audit settings - try turning off audit and see if it helps.
Ultimately, have a support case logged with your regional ABB support center.