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sql: create system.mvcc_statistics table and update job #111365

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sql: create system.mvcc_statistics table and update job #111365

wants to merge 1 commit into from

Commits on Oct 3, 2023

  1. sql: create system.mvcc_statistics table and update job 

    The system.mvcc_statistics table stores historical mvcc data
for a tenant's SQL objects. It's purpose it to serve mvcc data for a
SQL object quickly - The span stats API is too slow to use in a hot path.
Storing data over time unlocks new use cases like showing a table or
index's accumulated garbage over time.

The MVCCStatisticsUpdate Job is responsible for managing the contents of
the table, decoupled from the read-hotpath.

Both the table and job are baked when a cluster bootstraps itself, or upgrades
itself from a previous version.

Epic: CRDB-25491
Release note: None
    Zach Lite committed Oct 3, 2023
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