Thanks Steven,
> Evidently my second email got lost somewhere along the way- what
> you're
> looking for is an extension called 'pgrowlocks':
>
> https://www.postgresql.org/docs/10/static/pgrowlocks.html
>
> My prior email on that subject is here:
>
> https://www.postgresql.org/message-id/20180315220512.GV2416%40tamriel.snowman.net
>
I’ll look into that as soon after next week.
Best,
/eno