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How are parameter settings passed to the PostgreSQL server?
During server startup, parameter settings can be passed to the postgres command via the -c command-line parameter. For example, Settings provided in this way override those set via postgresql.conf or ALTER SYSTEM, so they cannot be changed globally without restarting the server.
How to change a password in PostgreSQL 9.1?
To login without a password: If that does not work, reconfigure authentication. Edit /etc/postgresql/9.1/main/pg_hba.conf (path will differ) and change: You can and should have the users’s password encrypted: I believe the best way to change the password is simply to use: in the Postgres console. Per ALTER USER documentation:
How to use alter system in PostgreSQL?
In order to be able to use that, you need to create a tablespace on that volume, create a directory there (owned by the postgres user!), then run this: Note that for the alter system to have any effect, you need to reload the configuration:
Which is the correct work Mem value for PostgreSQL?
The default value for this parameter, which is set in postgresql.conf, is: #work_mem = 4MB Setting the correct value of work_mem parameter can result in less disk-swapping, and therefore far quicker queries. We can use the formula below to calculate the optimal work_mem value for the database server: Total RAM * 0.25 / max_connections
Which is the corresponding function in PostgreSQL set?
The corresponding function is current_setting (setting_name text). The SET command allows modification of the current value of those parameters that can be set locally to a session; it has no effect on other sessions. The corresponding function is set_config (setting_name, new_value, is_local).
Where are my postgresql.conf files located?
In addition to postgresql.conf, a PostgreSQL data directory contains a file postgresql.auto.conf, which has the same format as postgresql.conf but is intended to be edited automatically not manually. This file holds settings provided through the ALTER SYSTEM command.
How to reload configuration file in PostgreSQL 9.6?
The configuration file is reread whenever the main server process receives a SIGHUP signal; this signal is most easily sent by running pg_ctl reload from the command line or by calling the SQL function pg_reload_conf ().