Backport #3881 to v21.11.x #3937
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(cherry picked from commit d691719)
(cherry picked from commit 509c545)
(cherry picked from commit 917e2a0)
Removed the metric as it belongs to the ntp level. (cherry picked from commit ac85cfc)
Previously, upload lag was calculated in archival_policy, which could be misleading as start_offset passed to it can be greater than the offset that was uploaded (e.g. in case when several upload candidates are created in one pass). (cherry picked from commit 11c928b)
(cherry picked from commit 5d9250f)
Previously, offset gaps metric was incremented in the archival_policy methods, which could be incorrect because archival_policy can be called many times without actually uploading any segments. Also the code missed the case when there is a gap between local segments. We increment this metric after actually uploading a segment, which is more robust. (cherry picked from commit fe8e19a)
Lazin
approved these changes
Mar 4, 2022
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Backport #3881 to v21.11.x
Cover letter
Improve shadow indexing metrics:
Fixes: #2818
Release notes
Improvements