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Add slotsync_skip_reason column to pg_replication_slots view.

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Introduce a new column, slotsync_skip_reason, in the pg_replication_slots
view. This column records the reason why the last slot synchronization was
skipped. It is primarily relevant for logical replication slots on standby
servers where the 'synced' field is true. The value is NULL when
synchronization succeeds.

Author: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Ashutosh Sharma <ashu.coek88@gmail.com>
Reviewed-by: Hou Zhijie <houzj.fnst@fujitsu.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAE9k0PkhfKrTEAsGz4DjOhEj1nQ+hbQVfvWUxNacD38ibW3a1g@mail.gmail.com
This commit is contained in:
Amit Kapila
2025-11-28 05:21:35 +00:00
parent 9ccc049dfe
commit e68b6adad9
13 changed files with 149 additions and 17 deletions
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6
src/test/recovery/t/040_standby_failover_slots_sync.pl
View File

@@ -1049,6 +1049,12 @@ $standby2->wait_for_log(qr/slot sync worker started/, $log_offset);
$standby2->wait_for_log(
qr/could not synchronize replication slot \"lsub1_slot\"/, $log_offset);
# Confirm that the slotsync skip reason is updated
$result = $standby2->safe_psql('postgres',
"SELECT slotsync_skip_reason FROM pg_replication_slots WHERE slot_name = 'lsub1_slot'"
);
is($result, 'wal_or_rows_removed', "check slot sync skip reason");
# Confirm that the slotsync skip statistics is updated
$result = $standby2->safe_psql('postgres',
"SELECT slotsync_skip_count > 0 FROM pg_stat_replication_slots WHERE slot_name = 'lsub1_slot'"

5
src/test/regress/expected/rules.out
View File

@@ -1507,8 +1507,9 @@ pg_replication_slots| SELECT l.slot_name,
l.conflicting,
l.invalidation_reason,
l.failover,
l.synced
FROM (pg_get_replication_slots() l(slot_name, plugin, slot_type, datoid, temporary, active, active_pid, xmin, catalog_xmin, restart_lsn, confirmed_flush_lsn, wal_status, safe_wal_size, two_phase, two_phase_at, inactive_since, conflicting, invalidation_reason, failover, synced)
l.synced,
l.slotsync_skip_reason
FROM (pg_get_replication_slots() l(slot_name, plugin, slot_type, datoid, temporary, active, active_pid, xmin, catalog_xmin, restart_lsn, confirmed_flush_lsn, wal_status, safe_wal_size, two_phase, two_phase_at, inactive_since, conflicting, invalidation_reason, failover, synced, slotsync_skip_reason)
LEFT JOIN pg_database d ON ((l.datoid = d.oid)));
pg_roles| SELECT pg_authid.rolname,
pg_authid.rolsuper,