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Author SHA1 Message Date
Peter Štibraný ff80690a6e
Optimise lowWatermark in Isolation (#7332) 
* Track open appenders in doubly-linked list to make lowWatermark O(1).
* Use RW locks.
* Added BenchmarkIsolationWithState.

Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com>
 2020-06-03 20:09:05 +02:00
beorn7 d9af11e636 Do not attempt isolation for appendID == 0 
Signed-off-by: beorn7 <beorn@grafana.com>
 2020-03-01 02:48:35 +01:00
beorn7 7f30b0984d Implement isolation 
This has been ported from https://github.com/prometheus/tsdb/pull/306.

Original implementation by @brian-brazil, explained in detail in the
2nd half of this talk:
https://promcon.io/2017-munich/talks/staleness-in-prometheus-2-0/

The implementation was then processed by @gouthamve into the PR linked
above. Relevant slide deck:
https://docs.google.com/presentation/d/1-ICg7PEmDHYcITykD2SR2xwg56Tzf4gr8zfz1OerY5Y/edit?usp=drivesdk

Signed-off-by: beorn7 <beorn@grafana.com>
Co-authored-by: Brian Brazil <brian.brazil@robustperception.io>
Co-authored-by: Goutham Veeramachaneni <gouthamve@gmail.com>
 2020-02-28 14:18:39 +01:00