Hi,
On 7/18/19 9:09 PM, Michael Paquier wrote:
pg_receivewal -D /tmp/wal -S replica1 --synchronous -h localhost -p 5432 -U
repluser -W
psql -c 'SELECT * FROM pg_stat_replication;' postgres
psql -c 'SELECT * FROM pg_replication_slots;' postgres
psql -c 'CREATE DATABASE test' postgres
In what scenarios do you see 'on' working ?
Because the code says so, "on" is an alias for "remote_flush" (which
is not user-visible by the way):
src/include/access/xact.h:#define SYNCHRONOUS_COMMIT_ON
SYNCHRONOUS_COMMIT_REMOTE_FLUSH
And if you do that it works fine (pg_receivewal --synchronous runs in
the background and I created a dummy table):
=# SELECT application_name, sync_state, flush_lsn, replay_lsn FROM
pg_stat_replication;
application_name | sync_state | flush_lsn | replay_lsn
------------------+------------+-----------+------------
pg_receivewal | sync | 0/15E1F88 | null
(1 row)
=# set synchronous_commit to on ;
SET
=# insert into aa values (2);
INSERT 0 1
I forgot to use pg_receivewal -d with application_name instead of -h -p -U.
Maybe we should have an explicit option for that, but that is a separate
thread.
Best regards,
Jesper
