kvserverpb: mark probe requests' replicated cmds as IsTrivial #102953
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That way, they won't each request their own `replicaAppBatch`. They were wildly inefficient to apply before this commit, which played a role in a recent incident[^1]. [^1]: cockroachlabs/support#2287 Epic: none Release note: None
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This is the test used for cockroachdb#102953. Epic: none Release note: none
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104401: kvserver: add TestCreateManyUnappliedProbes r=pavelkalinnikov a=tbg This is the test used for #102953. This PR also makes modest progress on #75729, not by making log application stand-alone, but by making it somewhat less convoluted to manufacture log entries programmatically. It would be desirable to be able to test the replication layer in CRDB in the same way that Raft allows via the InteractionEnv[^1]. [^1]: https://github.com/etcd-io/raft/blob/6bf4f7fe3122b064e0a0d76314298dca6f379fc7/interaction_test.go Epic: none Release note: none 105083: kvcoord: Release catchup reservation before re-acquire attempt r=miretskiy a=miretskiy Release catchup scan reservation prior to attemt to re-acquire it. Failure to do so could result in a stuck mux rangefeed when enough ranges encounter an error, such as range split, prior to receiving the first checkpoint event, that would cause additional attempts to acquire catchup scan quota. Fixes #105058 Release note (bug fix): Fix a bug in mux rangefeed implementation that may cause mux rangefeed to become stuck if enough ranges encounter certain error concurrently. Co-authored-by: Tobias Grieger <[email protected]> Co-authored-by: Yevgeniy Miretskiy <[email protected]>
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That way, they won't each request their own
replicaAppBatch. They were wildlyinefficient to apply before this commit, which played a (minor) role in a recent
incident1.
To validate this change, I ran an experiment that set up a range with 10 million unapplied probes. This PR more than halved how long it took to apply the entries.
Without this change:
With this change:
Touches https://github.com/cockroachlabs/support/issues/2287.
Closes #103905.
Epic: none
Release note: None
Footnotes
https://github.com/cockroachlabs/support/issues/2287 ↩