On Tue, Aug 23, 2022 at 10:55:09AM +0100, Dave Page wrote: > Often it is beneficial to review one's schema with a view to removing indexes > (and sometimes tables) that are no longer required. It's very difficult to > understand when that is the case by looking at the number of scans of a > relation as, for example, an index may be used infrequently but may be > critical > in those times when it is used. > > The attached patch against HEAD adds optional tracking of the last scan time > for relations. It updates pg_stat_*_tables with new last_seq_scan and > last_idx_scan columns, and pg_stat_*_indexes with a last_idx_scan column to > help with this.
Would it be simpler to allow the sequential and index scan columns to be cleared so you can look later to see if it is non-zero? Should we allow arbitrary clearing of stat columns? -- Bruce Momjian <br...@momjian.us> https://momjian.us EDB https://enterprisedb.com Indecision is a decision. Inaction is an action. Mark Batterson
