There has been a large increase in warnings with normalized message: Expectation ({measure} <= {max}) by {by} not met (actual: {actual}): {query} since wmf.13 (deployed starting 13 October 2020):
There are lots of variants, e.g.:
- Expectation (masterConns <= 0) by MediaWiki::main not met (actual: 1): [...]
- Expectation (writes <= 0) by ApiMain::setRequestExpectations not met (actual: 1): query-m: INSERT INTO cu_changes [...]
- Expectation (writes <= 0) by MediaWiki::restInPeace not met (actual: 5): query-m: INSERT IGNORE INTO watchlist[...]
- Expectation (writes <= 0) by MediaWiki::restInPeace not met (actual: 3): query-m: UPDATE site_stats [...]
More examples at: https://logstash.wikimedia.org/goto/e39f841693dfdd3023ac54be22636b89
Could something have gone wrong somewhere with setting the expectations?