其中write_lag、flush一lag、replay_lag三个字段为PostgreSQL10版本新特性,是衡量主备延迟的重要指标 一,pg_stat_re [Yī,pg_stat_replication] A, pg_stat_replication
postgres pg_stat_replication 一,pg_stat_replication AI检测代码解析 postgres=#select*frompg_stat_replication ;-[RECORD 1]---+---pid|1219usesysid|16799usename|replica application_name|walreceiver client_addr|192.168.0.187client_hostname|client_port|41760backend_start|2020-06-1210:48:09.57447+08back...
2.. 使用 pg_stat_replication 视图 postgres=#selectclient_addr,client_hostname,client_port,state,sent_lsn,write_lsn,flush_lsn,replay_lsn,write_lag,replay_lag,flush_lag,sync_statefrompg_stat_replication;client_addr| client_hostname | client_port | state | sent_lsn | write_lsn | flush_lsn ...
postgres=#create role replica login replication encrypted password 'replica'; 2. 认证文件pg_hba.conf #配置从库可以采用replica账号进行同步 [root@psql_master ~]#vim /var/lib/pgsql/9.6/data/pg_hba.conf host replication replica 192.168.159.0/24 md5 3. 主库配置文件postgresql.conf [root@psql_mast...
select client_addr,sync_state from pg_stat_replication; 【免责声明】:本平台发布及转载文章仅作同行交流学习,部分数据来源于网络,未经证实,并非商业用途,也并非针对具体单位和个人,请勿对号入座,部分内容及图片来源于网络,版权归原作者所有,若未能找到作者和原始出处还望谅解。如有版权疑问,或者文章内容出现侵权行为...
postgres=# select sent_lsn from pg_stat_replication; 在主节点上查询,输出已经发送的wal log的位置,例如 0/1F000000 如果上述两个数相差较大,那么主节点可能是负载太高了(导致无法及时把wal log给同步出去) postgres=# select * from pg_last_wal_receive_lsn(); ...
如果需要监控同步状态,可以查询相关的系统视图,如pg_stat_replication。 6. 监控和告警 建立完善的监控机制,实时监测数据同步的状态、性能指标和错误情况。一旦出现异常,及时发送告警通知运维人员进行处理。 示例代码 以下是一个使用Python和psycopg2库通过编程实现数据同步的示例代码: python import psycopg2 def sync_...
LANGUAGE sqlVOLATILESECURITY DEFINER;CREATE OR REPLACE VIEW postgres_exporter.pg_stat_activityASSELECT * from get_pg_stat_activity();GRANT SELECT ON postgres_exporter.pg_stat_activity TO postgres_exporter;CREATE OR REPLACE FUNCTION get_pg_stat_replication() RETURNS SETOF pg_stat_replication AS$$ ...
postgres$/usr/pgsql-14/bin/pg_ctl start -D /oracle/pg_data 10. Verify the streaming replication: -- Run on this primary server for outgoing replication detailspostgres=#select * from pg_stat_replication;-[ RECORD 1 ]---+--- pid | 10799 usesysid | 10 usename | postgres...
pg_stat_activity: Displays information about the current state of all server processes, including currently running queries. What is the purpose of PostgreSQL extensions? chevron_right Extensions in PostgreSQL enhance the functionality of the database. Popular extensions include PostGIS for ...