pageserver: reduce ops tracked at per-timeline detail #8245
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jcsp
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c/storage/pageserver
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3006 tests run: 2891 passed, 0 failed, 115 skipped (full report)Code coverage* (full report)
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0e54d27 at 2024-07-03T13:18:33.885Z :recycle: |
jcsp
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Jul 3, 2024
## Problem The metrics we have today aren't convenient for planning around the impact of timeline archival on costs. Closes: #8108 ## Summary of changes - Add metric `pageserver_archive_size`, which indicates the logical bytes of data which we would expect to write into an archived branch. - Add metric `pageserver_pitr_history_size`, which indicates the distance between last_record_lsn and the PITR cutoff. These metrics are somewhat temporary: when we implement #8088 and associated consumption metric changes, these will reach a final form. For now, an "archived" branch is just any branch outside of its parent's PITR window: later, archival will become an explicit state (which will _usually_ correspond to falling outside the parent's PITR window). The overall volume of timeline metrics is something to watch, but we are removing many more in #8245 than this PR is adding.
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Problem
We record detailed histograms for all page_service op types, which mostly aren't very interesting, but make our prometheus scrapes huge.
Closes: #8223
Summary of changes
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