On Wed, 2019-10-30 at 16:59 +0000, M Tarkeshwar Rao wrote: > Getting following error in using cursor to fetch the records from a large > table in c language. > Can you please suggest why it is coming and what is the remedy for this. > > Error Details > ----------------- > Failed to execute the sql command close: > mycursor_4047439616_1571970686004430275FATAL: terminating connection due to > conflict with recovery > DETAIL: User query might have needed to see row versions that must be > removed. > HINT: In a moment you should be able to reconnect to the database and repeat > your command.
This is not a proble with your program. Your query is running against a standby server with "hot_standby" on, and there are conflicts between replication and your query. If you increase "max_standby_streaming_delay" in "postgresql.conf" on the standby, your query will be given more time to complete. This will, however, cause replay of the replicated changes to be delayed. Yours, Laurenz Albe
