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| author | Amit Kapila <akapila@postgresql.org> | 2023-02-02 08:15:18 +0530 |
|---|---|---|
| committer | Amit Kapila <akapila@postgresql.org> | 2023-02-02 08:15:18 +0530 |
| commit | 9f2213a7c575bae43a2d41abc8b60770066ca81c (patch) | |
| tree | 5456fdc30b648c117a14f863d2c2857307485cd2 /src/backend/utils/misc/guc_tables.c | |
| parent | fb1a59de0c52609653166aafc6ce8679a9cfe54b (diff) | |
| download | postgresql-9f2213a7c575bae43a2d41abc8b60770066ca81c.tar.gz postgresql-9f2213a7c575bae43a2d41abc8b60770066ca81c.zip | |
Allow the logical_replication_mode to be used on the subscriber.
Extend the existing developer option 'logical_replication_mode' to help
test the parallel apply of large transactions on the subscriber.
When set to 'buffered', the leader sends changes to parallel apply workers
via a shared memory queue. When set to 'immediate', the leader serializes
all changes to files and notifies the parallel apply workers to read and
apply them at the end of the transaction.
This helps in adding tests to cover the serialization code path in
parallel streaming mode.
Author: Hou Zhijie
Reviewed-by: Peter Smith, Kuroda Hayato, Sawada Masahiko, Amit Kapila
Discussion: https://postgr.es/m/CAA4eK1+wyN6zpaHUkCLorEWNx75MG0xhMwcFhvjqm2KURZEAGw@mail.gmail.com
Diffstat (limited to 'src/backend/utils/misc/guc_tables.c')
| -rw-r--r-- | src/backend/utils/misc/guc_tables.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/backend/utils/misc/guc_tables.c b/src/backend/utils/misc/guc_tables.c index c5a95f5dcca..b46e3b8c558 100644 --- a/src/backend/utils/misc/guc_tables.c +++ b/src/backend/utils/misc/guc_tables.c @@ -4920,8 +4920,10 @@ struct config_enum ConfigureNamesEnum[] = { {"logical_replication_mode", PGC_USERSET, DEVELOPER_OPTIONS, - gettext_noop("Controls when to replicate each change."), - gettext_noop("On the publisher, it allows streaming or serializing each change in logical decoding."), + gettext_noop("Controls when to replicate or apply each change."), + gettext_noop("On the publisher, it allows streaming or serializing each change in logical decoding. " + "On the subscriber, it allows serialization of all changes to files and notifies the " + "parallel apply workers to read and apply them at the end of the transaction."), GUC_NOT_IN_SAMPLE }, &logical_replication_mode, |