Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

Checking PostgreSQL Replication Delay

You can get the delay in bytes from the master side quite easily using pg_xlog_location_diff to compare the master's pg_current_xlog_insert_location with the replay_location for that backend's pg_stat_replication entry.

postgres=# SELECT
 pg_last_xlog_receive_location() receive,
 pg_last_xlog_replay_location() replay,
 (
  extract(epoch FROM now()) -
  extract(epoch FROM pg_last_xact_replay_timestamp())
 )::int lag;

 receive   |   replay   |  lag
------------+------------+-------
1/AB861728 | 1/AB861728 | 2027

the lag is only only important when receive is different than replay. execute the query on the slave


Comments

Popular posts from this blog

How to Get Table Size, Database Size, Indexes Size, schema Size, Tablespace Size, column Size in PostgreSQL Database

2017 Shortern URL - Other Website Like ADFOC.US

How to Repair Corrupt database postgresql

How To Schedule PostgreSQL Jobs using pgAgent on Linux plateform

How to find the server is whether standby (slave) or primary(master) in Postgresql replication ?