Re: Execute VACUUM FULL when DB touches a specific size ?

Hi,

I wish to execute VACUUM FULL when DB touches a specific size. How to do
it ?

I'm aware about the caveats of VACUUM FULL.

--
Nilesh Govindarajan
Site & Server Administrator
www.itech7.com
मेरा भारत महान !
मम भारत: महत्तम भवतु !

On Sun, Apr 4, 2010 at 8:21 PM, Nilesh Govindarajan <lists(at)itech7(dot)com> wrote:
> Hi,
>
> I wish to execute VACUUM FULL when DB touches a specific size. How to do it
> ?
>
> I'm aware about the caveats of VACUUM FULL.
>

Write a bash script that cds to the data dir and runs du -s, grabs the
value, and if it's over a certain size then run vacuum full.

On 04/05/10 08:54, Scott Marlowe wrote:
> On Sun, Apr 4, 2010 at 8:21 PM, Nilesh Govindarajan<lists(at)itech7(dot)com> wrote:
>> Hi,
>>
>> I wish to execute VACUUM FULL when DB touches a specific size. How to do it
>> ?
>>
>> I'm aware about the caveats of VACUUM FULL.
>>
>
> Write a bash script that cds to the data dir and runs du -s, grabs the
> value, and if it's over a certain size then run vacuum full.

That's what I was thinking to do, but how do I distinguish between the
databases ? The datadir/base seems have directories whose names are numbers.

--
Nilesh Govindarajan
Site & Server Administrator
www.itech7.com
मेरा भारत महान !
मम भारत: महत्तम भवतु !

> That's what I was thinking to do, but how do I distinguish between the databases ? The datadir/base seems have directories whose names are numbers.

Use pg_database_size function to get the size of DB.

You can create a plpgsql function, which you can schedule using pgagent

Or

If you are writing Bash script capture the return value of pg_database_size function, in some variable and perform vacuum.

Thanks & Regards,
Vibhor Kumar (PCP & OCP)
ITIL V3 Cerftified.

On 05-Apr-2010, at 9:38 AM, Nilesh Govindarajan wrote:

> On 04/05/10 08:54, Scott Marlowe wrote:
>> On Sun, Apr 4, 2010 at 8:21 PM, Nilesh Govindarajan<lists(at)itech7(dot)com> wrote:
>>> Hi,
>>>
>>> I wish to execute VACUUM FULL when DB touches a specific size. How to do it
>>> ?
>>>
>>> I'm aware about the caveats of VACUUM FULL.
>>>
>>
>> Write a bash script that cds to the data dir and runs du -s, grabs the
>> value, and if it's over a certain size then run vacuum full.
>
>
>
> --
> Nilesh Govindarajan
> Site & Server Administrator
> www.itech7.com
> मेरा भारत महान !
> मम भारत: महत्तम भवतु !
>
> --
> Sent via pgsql-admin mailing list (pgsql-admin(at)postgresql(dot)org)
> To make changes to your subscription:
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Le 05/04/2010 06:08, Nilesh Govindarajan a écrit :
> On 04/05/10 08:54, Scott Marlowe wrote:
>> On Sun, Apr 4, 2010 at 8:21 PM, Nilesh Govindarajan<lists(at)itech7(dot)com>
>> wrote:
>>> Hi,
>>>
>>> I wish to execute VACUUM FULL when DB touches a specific size. How to
>>> do it
>>> ?
>>>
>>> I'm aware about the caveats of VACUUM FULL.
>>>
>>
>> Write a bash script that cds to the data dir and runs du -s, grabs the
>> value, and if it's over a certain size then run vacuum full.
>
> That's what I was thinking to do, but how do I distinguish between the
> databases ? The datadir/base seems have directories whose names are
> numbers.
>

You can find the number with a simple query (SELECT oid FROM pg_database
WHERE datname='your database name') or with the oid2name contrib module.

But that's not the real issue. If you have objects of this database in
other tablespaces, "du -sh" on datadir/base/<oid> won't count them. You
should better use this query:

SELECT pg_database_size('your database name')

to get the total size of your database.

--
Guillaume.
http://www.postgresqlfr.org
http://dalibo.com