I queried pg_replication_slots after I removed an BDR node and I noticed a
slot_name that isn't in bdr.bdr_node_slots. And active is 'f' and it has
been retaining bytes. Should I be concerned and is there a way to remove
it. I do still have one UDR node which is running
(bdr_16385_6228994276814368133_1_16384). Any suggestions?
svp2=# SELECT
slot_name, database, active,
pg_xlog_location_diff(pg_current_xlog_insert_location(), restart_lsn)
AS retained_bytes
FROM pg_replication_slots
WHERE plugin = 'bdr';
slot_name | database | active |
retained_bytes
-----------------------------------------+----------+--------+----------------
bdr_16385_6206441431541275808_1_16385__ | svp2 | f |
410036551440
bdr_16385_6228994276814368133_1_16384__ | svp2 | t |
285760
(2 rows)
svp2=# SELECT * FROM pg_stat_replication;
-[ RECORD 1 ]----+-------------------------------------------
pid | 1122
usesysid | 10
usename | postgres
application_name | bdr (6228994276814368133,1,16384,):receive
client_addr | 10.253.0.8
client_hostname |
client_port | 43724
backend_start | 2016-02-25 17:53:21.10519-08
backend_xmin |
state | streaming
sent_location | 184/AE210BC8
write_location | 184/AE210BC8
flush_location | 184/AE20E748
replay_location | 184/AE210BC8
sync_priority | 0
sync_state | async
svp2=# select * from bdr.bdr_node_slots;
node_name | slot_name
-----------+-----------
(0 rows)
svp2=# SELECT * FROM bdr.bdr_nodes;
-[ RECORD 1 ]------+------------------------------------------
node_sysid | 6206439726032130602
node_timeline | 1
node_dboid | 16385
node_status | r
node_name | BDR1
node_local_dsn | host=10.253.228.105 port=5432 dbname=svp2
node_init_from_dsn |
-[ RECORD 2 ]------+------------------------------------------
node_sysid | 6206440469625465777
node_timeline | 1
node_dboid | 16385
node_status | k
node_name | BDR2
node_local_dsn | host=10.253.16.25 port=5432 dbname=svp2
node_init_from_dsn | host=10.253.228.105 port=5432 dbname=svp2
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