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OM 2.0: Add requirements to exemplar timestamps, and clarify exemplar labels#2872

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dashpole wants to merge 2 commits intoprometheus:mainfrom
dashpole:cleanup_2
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OM 2.0: Add requirements to exemplar timestamps, and clarify exemplar labels#2872
dashpole wants to merge 2 commits intoprometheus:mainfrom
dashpole:cleanup_2

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@dashpole dashpole commented Mar 9, 2026

Changes:

  • Exemplar timestamp must be between start and end timestamps (if present, inclusive).
  • Exemplar labels SHOULD NOT overlap with metric labels. (Changes MAY -> SHOULD). The whole point of exemplar labels is to carry data that is too high cardinality for metric labels. There isn't any point in having the same label on both.

cc @bwplotka @krajorama @ywwg

Signed-off-by: David Ashpole <dashpole@google.com>
Co-authored-by: Bartlomiej Plotka <bwplotka@gmail.com>
Signed-off-by: David Ashpole <dashpole@google.com>
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