Hello hackers,
The attached patch adds a new option work_mem to postgres_fdw contrib module.
Previously, it was impossible to change the setting of work_mem for remote session with connection by postgres_fdw.
By adding this option to the CREATE SERVER statement, you can also change the work_mem setting for remote sessions with postgres_fdw.
Usage is the same as other options, and specify work_mem as an option of the CREATE SERVER statement. The string you specify is the same as the format of work_mem in GUC.
Example
----------
postgres=# CREATE SERVER remsvr1 FOREIGN DATA WRAPPER postgres_fdw OPTIONS ( host 'remhost1', port '5433', dbname 'demodb', work_mem '16MB');
CREATE SERVER
Not only CREATE SERVER statement but ALTER SERVER statement are also available.
postgres=# ALTER SERVER remsvr1 OPTIONS ( SET work_mem '32MB');
ALTER SERVER
postgres=# SELECT * FROM pg_foreign_server;
-[ RECORD 1 ]----------------------------------------------------------
srvname | remsvr1
srvowner | 10
srvfdw | 16389
srvtype |
srvversion |
srvacl |
srvoptions | {host=remhost1,port=5433,dbname=demodb,work_mem=32MB}
Within this patch, I implemented a change in GUC work_mem by specifying "options -c work_mem=value" for the PQconnectdbParams API function.
Best Regards,
Noriyoshi Shinoda
