command to check the database size ?

Hi

Please help, I am new to postgres administration. I just need a command to check the size of the database.

I tried searching but no luck. The server is running on Postgres 7.3.4 and O/S Linux Centos 5. The data sits on /data/postgres7.3.4/data directory. There is no directory like /usr/src/postgresql-7.3.4/contrib/dbsize

But the backup server which is also running postgres 7.3.4 but on Redhat 9 does have /usr/src/postgresql-7.3.4/contrib/dbsize directory which has the following files but I don't what to from from:

[root(at)c9903 dbsize]# pwd
/usr/src/postgresql-7.3.4/contrib/dbsize
[root(at)c9903 dbsize]# ls -ltrh
total 16K
-rw-r--r-- 1 70 wheel 201 Feb 23 2002 Makefile
-rw-r--r-- 1 70 wheel 253 Apr 2 2002 dbsize.sql.in
-rw-r--r-- 1 70 wheel 554 Jun 23 2002 README.dbsize
-rw-r--r-- 1 70 wheel 2.6K Sep 4 2002 dbsize.c
[root(at)c9903 dbsize]#

I also could not find functions like pg_database_size(), pg_size_pretty()

,etc in this old version of postgres7.3.4.

In summary I can't find the command to find the database size from the main server and from the backup server.

Please help

Thanks

Khangelani

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