pglogical monitor queries taken from https://cloud.google.com/alloydb/docs/omni/monitor-pglogical

pglogical.maintenance.sql

select
    name,
    setting
from
    pg_settings
where
    name in ('wal_level', 'track_commit_timestamp', 'max_worker_processes', 'max_replication_slots', 'max_wal_senders  ', 'shared_preload_libraries');

SELECT name,
    setting,
    source,
    short_desc
FROM pg_catalog.pg_settings
WHERE name LIKE '%pglogical%'
ORDER BY category, name;


SELECT name,
    setting,
    source,
    short_desc
FROM pg_catalog.pg_settings
WHERE name IN ('wal_level',
             'max_worker_processes',
             'max_replication_slots',
             'max_wal_senders',
             'shared_preload_libraries',
             'track_commit_timestamp')
ORDER BY name;


SELECT node_id,
    if_nodeid AS node_id,
    if_name AS node_name,
    if_dsn AS dsn
FROM pglogical.node_interface
LEFT JOIN pglogical.local_node ON (node_id = if_nodeid AND node_local_interface = if_id)
ORDER BY node_name;


SELECT s.sub_name AS subscription_name,
    n1.node_name AS origin_name,
    n2.node_name AS target_name,
    x.status,
    sub_slot_name,
    sub_replication_sets,
    sub_forward_origins,
    sub_apply_delay,
    sub_force_text_transfer,
    sub_enabled AS enabled
FROM pglogical.subscription s,
    (SELECT subscription_name, status FROM pglogical.show_subscription_status()) AS x,
    pglogical.node n1,
    pglogical.node n2
WHERE s.sub_origin = n1.node_id
AND s.sub_target = n2.node_id
AND s.sub_name = x.subscription_name
ORDER BY s.sub_name;


SELECT sync_nspname||'.'||sync_relname AS table_name,
    sync_status,
    sync_statuslsn
FROM pglogical.local_sync_status
WHERE sync_relname IS NOT NULL
ORDER BY table_name;


SELECT * FROM pglogical.show_subscription_table('test_sub_1','test_table_1');