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| author | Andres Freund | 2023-04-08 07:24:24 +0000 |
|---|---|---|
| committer | Andres Freund | 2023-04-08 08:06:00 +0000 |
| commit | e101dfac3a53c20bfbf1ca85d30a368c2954facf (patch) | |
| tree | 1a5c755d9eb0a2f6f1d6251d9dd9f185654534cb /src/backend/utils/adt/regexp.c | |
| parent | 26669757b6a7665c1069e77e6472bd8550193ca6 (diff) | |
For cascading replication, wake physical and logical walsenders separately
Physical walsenders can't send data until it's been flushed; logical
walsenders can't decode and send data until it's been applied. On the
standby, the WAL is flushed first, which will only wake up physical
walsenders; and then applied, which will only wake up logical
walsenders.
Previously, all walsenders were awakened when the WAL was flushed. That
was fine for logical walsenders on the primary; but on the standby the
flushed WAL would have been not applied yet, so logical walsenders were
awakened too early.
Per idea from Jeff Davis and Amit Kapila.
Author: "Drouvot, Bertrand" <[email protected]>
Reviewed-By: Jeff Davis <[email protected]>
Reviewed-By: Robert Haas <[email protected]>
Reviewed-by: Amit Kapila <[email protected]>
Reviewed-by: Masahiko Sawada <[email protected]>
Discussion: https://postgr.es/m/CAA4eK1+zO5LUeisabX10c81LU-fWMKO4M9Wyg1cdkbW7Hqh6vQ@mail.gmail.com
Diffstat (limited to 'src/backend/utils/adt/regexp.c')
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