Hi,
On 4/13/23 12:43 AM, sirisha chamarthi wrote:
Hi,
pg_create_logical_replication_slot can take longer than usual on a standby when
there is no activity on the primary. We don't have enough information in the
pg_stat_activity or process title to debug why this is taking so long. Attached
a small patch to update the process title while waiting for the wal in
read_local_xlog_page_guts. Any thoughts on introducing a new wait event too?
For example, in my setup, slot creation took 8 minutes 13 seconds. It only
succeeded after I ran select txid_current() on primary.
FWIW, this behavior has been mentioned in 0fdab27ad6 and a new function
(pg_log_standby_snapshot()) has been created/documented to accelerate the slot
creation on the standby.
Regards,
--
Bertrand Drouvot
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com
