replication slots 是从postgresql 9.4 引入的, 主要是提供了一种自动化的方法来确保主控机在所有的后备机收到 WAL 段 之前不会移除它们,并且主控机也不会移除可能导致恢复冲突的行,即使后备机断开也是如此。 在没有启用 replication slots 的环境中,如果碰到 ERROR: requested WAL segment xxxx has already been re...
Learn how to use replication slots with PostgreSQL's streaming physical replication. We also discuss their benefits and disadvantages.This tutorial assumes you have already setup streaming replication between a primary and a replica PostgreSQL server. If you need to set that up first, run through ...
Streaming replication was added to PostgreSQL inorder to improve the log shipping process. With streaming replication, the standby server will connect to the primary server over the network (using a different protocol than the standard client protocol). The primary server can then send WAL file con...
postgres-# publication pub1; NOTICE: created replication slot "sub1" on publisher CREATE SUBSCRIPTION 1. 2. 3. 4. 5. 6. 在发布节点(主)查看逻辑复制槽信息 postgres=# select slot_name , plugin , slot_type , database , active , restart_lsn postgres-# from pg_replication_slots; slot_name...
max_replication_slots = 1 max_wal_size = 10GB log_destination = 'csvlog' logging_collector = on log_directory = 'pg_log' log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' log_file_mode = 0600 log_truncate_on_rotation = on
在PG的架构上,逻辑解码是发生在wal_sender上的,而不是消费者负责解码(oracle则支持在主机或其它实例,其他实例要求包含catalog,和维护replslot(replication slots 是从 postgresql 9.4 引入的,主要是提供了一种自动化的方法来确保主控机在所有的后备机收到 WAL 段之前不会移除它们,并且主控机也不会移...
Slots array 实例Replication Slot 信息列表。 Slot object 实例Replication Slot。 Database string Replication Slot 所在的数据库名称。 db_test01 Plugin string Replication Slot 使用的插件。 test_decoding SlotName string Replication Slot 名称。 slot_test01 SlotStatus string Replication Slot 状态。 ACTIVE:活...
(1 row) postgres=# select slot_name, slot_type, active, wal_status from pg_replication_slots; slot_name | slot_type | active | wal_status ---+---+---+--- db1_repl_slot | physical | f | (1 row) // 备份主库 $ /usr/local/postgres/bin/pg_basebackup --pgdata /postgres/mast...
该接口用于删除实例的指定Replication Slot。 接口说明 适用引擎 RDS PostgreSQL 注意事项 仅当Replication Slot 的状态(SlotStatus)为 INACTIVE 时,可以被删除。您可以调用 DescribeSlots 接口查询 Replication Slot 状态。 调试 您可以在OpenAPI Explorer中直接运行该接口,免去您计算签名的困扰。运行成功后,OpenAPI Explor...
Replication slots are used to safeguard against the premature deletion of WAL segments before they have been applied by the standby server, thus preventing data loss. By keeping an eye on and fine-tuning these slots, you can better control disk space usage on the primary server and avert repl...