pg_stat_wal_receiver 是一个 统计视图，显示有关服务器 WAL 接收器的信息（如果正在运行）。
pg_stat_wal_receiver 在 PostgreSQL 9.6 中引入。
源代码
pg_stat_wal_receiver 基于内部系统函数 pg_stat_get_wal_receiver()，定义在 src/backend/replication/walreceiver.c 中。
按 PostgreSQL 版本定义
pg_stat_wal_receiver (PostgreSQL 17)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
written_lsn | pg_lsn | | |
flushed_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 16)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
written_lsn | pg_lsn | | |
flushed_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 15)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
written_lsn | pg_lsn | | |
flushed_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 14)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
written_lsn | pg_lsn | | |
flushed_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 13)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
written_lsn | pg_lsn | | |
flushed_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 12)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
received_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 11)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
received_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
sender_host | text | | |
sender_port | integer | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 10)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Collation | Nullable | Default
-----------------------+--------------------------+-----------+----------+---------
pid | integer | | |
status | text | | |
receive_start_lsn | pg_lsn | | |
receive_start_tli | integer | | |
received_lsn | pg_lsn | | |
received_tli | integer | | |
last_msg_send_time | timestamp with time zone | | |
last_msg_receipt_time | timestamp with time zone | | |
latest_end_lsn | pg_lsn | | |
latest_end_time | timestamp with time zone | | |
slot_name | text | | |
conninfo | text | | |
pg_stat_wal_receiver (PostgreSQL 9.6)
View "pg_catalog.pg_stat_wal_receiver"
Column | Type | Modifiers
-----------------------+--------------------------+-----------
pid | integer |
status | text |
receive_start_lsn | pg_lsn |
receive_start_tli | integer |
received_lsn | pg_lsn |
received_tli | integer |
last_msg_send_time | timestamp with time zone |
last_msg_receipt_time | timestamp with time zone |
latest_end_lsn | pg_lsn |
latest_end_time | timestamp with time zone |
slot_name | text |
conninfo | text |
更改历史记录
- PostgreSQL 13
- PostgreSQL 11
- 添加了列
sender_host和sender_port(提交 9a895462)
- 添加了列
- PostgreSQL 9.6
- 添加 (提交 b1a9bad9)
示例
-[ RECORD 1 ]---------+----------------------------------------------------------------------
pid | 99636
status | streaming
receive_start_lsn | 0/3000000
receive_start_tli | 1
received_lsn | 0/3001FE0
received_tli | 1
last_msg_send_time | 2019-06-01 15:57:46.097546+02
last_msg_receipt_time | 2019-06-01 15:57:46.097761+02
latest_end_lsn | 0/3001FE0
latest_end_time | 2019-06-01 15:43:14.741461+02
slot_name |
sender_host | node1
sender_port | 5432
conninfo | user=postgres dbname=replication host=node1 port=5432
application_name=node2 fallback_application_name=walreceiver
注意：“状态”可以是以下之一：
stopped(WALRCV_STOPPED)starting(WALRCV_STARTING)streaming(WALRCV_STREAMING)waiting(WALRCV_WAITING)restarting(WALRCV_RESTARTING)stopping(WALRCV_STOPPING)
请参阅 src/backend/replication/walreceiver.c 中的函数 WalRcvGetStateString()。
参考文献
- PostgreSQL 文档： pg_stat_wal_receiver