Search Postgresql Archives

Re: A 154 GB table swelled to 527 GB on the Slony slave. How to compact it?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, Mar 12, 2012 at 3:06 AM, Nur Hidayat <hidayat365@xxxxxxxxx> wrote:
> I once have the same problem. In my case it's because most of my table using
> text datatype.
> When I change the field type to character varying (1000) database size
> reduced significantly

I'll bet what happened was postgres re-wrote your table for you,
effectively doing a compaction.  You can get similar effect by doing
an alter table and "changing" an INTEGER field to be INTEGER.
Postgres does not optimize that do a no-op, so you get the re-writing
effect.

-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux