{"action":"opened","number":23884,"pull_request":{"url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/23884","id":175116079,"html_url":"https://github.com/cockroachdb/cockroach/pull/23884","diff_url":"https://github.com/cockroachdb/cockroach/pull/23884.diff","patch_url":"https://github.com/cockroachdb/cockroach/pull/23884.patch","issue_url":"https://api.github.com/repos/cockroachdb/cockroach/issues/23884","number":23884,"state":"open","locked":false,"title":"backport-2.0: storage: lower the raft-log queue timer from 50ms to 0ms","user":{"login":"petermattis","id":6201335,"avatar_url":"https://avatars0.githubusercontent.com/u/6201335?v=4","gravatar_id":"","url":"https://api.github.com/users/petermattis","html_url":"https://github.com/petermattis","followers_url":"https://api.github.com/users/petermattis/followers","following_url":"https://api.github.com/users/petermattis/following{/other_user}","gists_url":"https://api.github.com/users/petermattis/gists{/gist_id}","starred_url":"https://api.github.com/users/petermattis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/petermattis/subscriptions","organizations_url":"https://api.github.com/users/petermattis/orgs","repos_url":"https://api.github.com/users/petermattis/repos","events_url":"https://api.github.com/users/petermattis/events{/privacy}","received_events_url":"https://api.github.com/users/petermattis/received_events","type":"User","site_admin":false},"body":"Backport 1/1 commits from #23869.\r\n\r\n/cc @cockroachdb/release\r\n\r\n---\r\n\r\nLower the raft-log queue timer from 50ms to 0ms. This timer was forcing\r\nan artificial delay between raft-log truncation operations which was in\r\nturn allowing the raft-log to grow undesirably long in cluster overload\r\nsituations. When the raft-log for a range grows to large, the eventual\r\ntruncation operation can then take a prohibitively long time which leads\r\nto a downward spiral of performance, oftentimes resulting in Raft\r\nsnapshots (which are significantly more expensive) and even further\r\nperformance degradation. There are no downsides to a zero duration\r\nbetween raft-log truncations as there are other mechanisms in place to\r\navoid performing truncations unless they are necessary (e.g. tracking of\r\nthe raft-log size and the number of entries).\r\n\r\nRelease note (performance improvement): Improve cluster performance\r\nduring overload 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