archive_timeout runtime change

2011/10/20 Birta Levente <blevi.linux@gmail.com>

Hi

I use postgrsql 9.1.1 and I want to change archive_timeout on a running
server. My default archive_timeout is 1800s, and nightly I want to change to
3600s or more, but I get the following error message:

set archive_timeout='3600';
ERROR: parameter "archive_timeout" cannot be changed now

and

update pg_settings set setting='900' where name='archive_timeout';
ERROR: parameter "archive_timeout" cannot be changed now

I know is possible to change this parameter with pg_ctl reload, but I think
if is possible without changing the conf file.

postgres=# select name,setting,context from pg_settings where name like
'%archive%';
name | setting |
context
---------------------------+----------------------------------------------+------------
archive_timeout | 0 |
sighup

You have to edit the configuration file and then reload the Database server
to affect these changes. You can't change the "archive_timeout" value
without editing the PostgreSQL.conf file.

Below link describes,changing the postgresql.conf from a script:

http://blog.endpoint.com/2011/08/changing-postgresqlconf-from-script.html

--Raghu