Re: ]To estimate the size of db

Hi, Gerd

> perhaps you can go the way via some system functions like:

Thank you very much and it's very helpful.

Regards
Duan

> ## list tables and their size
> SELECT relname AS table_name,
> pg_size_pretty(pg_relation_size(oid)) AS table_sz,
> pg_size_pretty(pg_total_relation_size(oid)) AS
> total_sz
> FROM pg_class
> WHERE relkind = 'r'
> ORDER BY pg_relation_size(oid) DESC;
>
> ## list db's and size
> SELECT datname AS db_name,
> pg_size_pretty(pg_database_size(oid)) AS db_size
> FROM pg_database
> ORDER BY pg_database_size(oid) DESC;
>
>
> hope that helps......::GERD::......
>
> Am 22.05.2008 um 03:08 schrieb Duan Ligong:
>
>> Hi, Scott
>>
>> Thanks for your reply.
>>
>>> There's also the old fashioned way:
>>
>> I mean I want to estimate the size of the space which the db will
>> occupy.
>> Now there is no db.
>>
>>> sudo su - postgres
>>> cd $PGDATA # or wherever you point with -D on startup
>>> du -sh .
>>
>> Regards
>> Duan
>> --
>> Duan Ligong
>> TEL : 0561-75-1925-6201
>> 800-81-569-6201
>> E-Mail : l-duan(at)zd(dot)cnes(dot)jp(dot)nec(dot)com
>> ----- Original Message ----- From: "Scott Marlowe"
>> <scott(dot)marlowe(at)gmail(dot)com>
>> To: "Duan Ligong" <l-duan(at)zd(dot)cnes(dot)jp(dot)nec(dot)com>
>> Cc: <pgsql-admin(at)postgresql(dot)org>
>> Sent: Thursday, May 22, 2008 4:08 AM
>> Subject: Re: [ADMIN] [Admin]To estimate the size of db
>>
>>
>>> On Wed, May 14, 2008 at 7:33 PM, Duan Ligong <l-
>>> duan(at)zd(dot)cnes(dot)jp(dot)nec(dot)com> wrote:
>>>>
>>>> Hi, all
>>>>
>>>> Is there a way to estimate the size of the space which a
>>>> postgresql database
>>>> occupies? or the max size of db?
>>>>
>>>> I know there are a lot of factors, such as the frequency
>>>> of updating, data size, which affects the size of db and it seems
>>>> difficult
>>>> to estimate it precisely.
>>>
>>> There's also the old fashioned way:
>>>
>>> sudo su - postgres
>>> cd $PGDATA # or wherever you point with -D on startup
>>> du -sh .
>>>
>>> --
>>> Sent via pgsql-admin mailing list (pgsql-admin(at)postgresql(dot)org)
>>> To make changes to your subscription:
>>> http://www.postgresql.org/mailpref/pgsql-admin
>>
>>
>> --
>> Sent via pgsql-admin mailing list (pgsql-admin(at)postgresql(dot)org)
>> To make changes to your subscription:
>> http://www.postgresql.org/mailpref/pgsql-admin