WAL backpressure #3218
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WAL backpressure #3218
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Codecov Report
@@ Coverage Diff @@
## master #3218 +/- ##
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+ Coverage 63.22% 63.30% +0.08%
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Files 196 197 +1
Lines 16671 16728 +57
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+ Hits 10540 10590 +50
- Misses 5174 5187 +13
+ Partials 957 951 -6
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cyriltovena
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Jan 26, 2021
cyriltovena
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Jan 27, 2021
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Jun 11, 2021
…rafana#3218) * Speed up the listing of rule groups on the Ruler Configuration API Signed-off-by: gotjosh <josue@grafana.com> * Update changelog based on feedback. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> Co-authored-by: Peter Štibraný <peter.stibrany@grafana.com>
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What
This PR introduces a backpressure mechanic to the ingester during WAL replay. This is primarily to allow specifying an upper bound of memory devoted to the replay which will be drained to storage once hit.
This also includes
UncompressedBytes. @slim-bean graciously cut2.0.1as a rollback target that supports this schema in the case of unforeseen failures.ingester.wal-replay-memory-ceilingloki_ingester_wal_recovered_bytes_totalandloki_ingester_wal_bytes_in_useDetails
Note, this will cause a drop in the chunk dedupe ratio when it is hit, thus I suggest specifying the limit as high as is tolerable to minimize the chances. Generally, the backpressure drainage should only happen after outages when the WAL is large or after moving scaling down memory budgets.