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.

Regards
Duan

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On Wed, May 14, 2008 at 8:33 PM, Duan Ligong <l-duan@zd.cnes.jp.nec.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?
>

if pg >= 8.1 then
http://www.postgresql.org/docs/8.1/s...S-ADMIN-DBSIZE
else
there is a contrib/dbsize
end if

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Cel. (593) 087171157

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On Wed, May 14, 2008 at 7:33 PM, Duan Ligong <l-duan@zd.cnes.jp.nec.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 .

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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
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Duan Ligong
TEL : 0561-75-1925-6201
800-81-569-6201
E-Mail : l-duan@zd.cnes.jp.nec.com
----- Original Message -----
From: "Scott Marlowe" <scott.marlowe@gmail.com>
To: "Duan Ligong" <l-duan@zd.cnes.jp.nec.com>
Cc: <pgsql-admin@postgresql.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@zd.cnes.jp.nec.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@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-admin
>


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Hi Duan,

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

## 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@zd.cnes.jp.nec.com
> ----- Original Message ----- From: "Scott Marlowe"
> <scott.marlowe@gmail.com>
> To: "Duan Ligong" <l-duan@zd.cnes.jp.nec.com>
> Cc: <pgsql-admin@postgresql.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@zd.cnes.jp.nec.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@postgresql.org)
>> To make changes to your subscription:
>> http://www.postgresql.org/mailpref/pgsql-admin
>
>
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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@zd.cnes.jp.nec.com
>> ----- Original Message ----- From: "Scott Marlowe"
>> <scott.marlowe@gmail.com>
>> To: "Duan Ligong" <l-duan@zd.cnes.jp.nec.com>
>> Cc: <pgsql-admin@postgresql.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@zd.cnes.jp.nec.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@postgresql.org)
>>> To make changes to your subscription:
>>> http://www.postgresql.org/mailpref/pgsql-admin
>>
>>
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