I agree that fuzzy matching etc. are usually not needed, but in my experience I need at least substring match. A log message may say "XYZ failed for FOO id 1234

I agree that fuzzy matching etc. are usually not needed, but in my experience I need at least substring match. A log message may say "XYZ failed for FOO id 1234556789" and I want to be able to search logs for 123456789 to see all related information (+ trace id if available) In systems that deal with asynchronous actions, log entries relating to "123456789" may be spread over minutes, hours or even days. When researching issues, I have found searches like Opensearch, Splunk etc. invaluable and think the additional cost is worth it. But we also don't have PB of logs to handle, so there may be a point where the cost is greater than the benefit.