Brent Ozar and others suggest to listen to severity 025 SQL-Server events. I searched for the meaning of all different high severity events, looked through different articles and read the most recent msdn documentation. But the only severity that seems to be monitored by everyone but explained nowhere is 25.

What is severity 25, where is it explained and what does it mean?

1 Answer 1


Severity 25 is a 'catch-all' fatal system error.

A severity 25 error is a fatal system error. I have heard that severity 25 is more or less a catch-all for miscellaneous fatal errors. I have only seen this error when related to failed upgrades: something prevents one of the upgrade scripts from running, and a severity 25 error is thrown


  • Does any official documentation exist?
    – Magier
    Nov 3, 2015 at 23:01

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