> > this information gives a complete picture of vacuum efficiency, because > > analyzing only total_time statistics does not give a complete picture of > > what vacuum did: was it cleaning almost huge index, cleaning tables or > > just sleeping. > > The purpose of total_time is to be able to calculate the average > time of a vacuum per relation from pg_stat_all_tables (by > total_time/vacuum_count) This is useful on its own to be able to > trend slow downs of vacuum ( or improvements after vacuum tuning ) > for specific relations. > > The work going into [1] is more detailed and will be useful > for deep dive investigations.In short, I think both proposals > have merit.
Missed this point in my last reply. This patch also tracks (auto)analyze per relation cumulative timing which can be useful along with (auto)analyze_count to derive the average. Regards, Sami
