On 2018-Nov-15, Laurenz Albe wrote:
> This new option would not only mitigate the long shared_buffers scan,
> it would also get rid of the replication conflict caused by the
> AccessExclusiveLock taken during truncation, which is discussed in
> https://www.postgresql.org/message-id/c9374921e50a5e8fb1ecf04eb8c6ebc3%40postgrespro.ru
> and seems to be a more difficult problem than anticipated.
FWIW I was just reminded yesterday that the AEL-for-truncation has been
diagnosed to be a severe problem in production, and with no other
solution in sight, I propose to move forward with the stop-gap.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
