Re: High Disk write and space taken by PostgreSQL

On Thu, Aug 16, 2012 at 03:48:57PM +1000, Ondrej Ivanič wrote:
> Hi,
>
> On 16 August 2012 15:40, J Ramesh Kumar <rameshj1977@gmail.com> wrote:
> > As you said, MySQL with MyISAM is better choice for my app. Because I don't
> > need transaction/backup. May be I'll try with InnoDB and find the disk
> > write/space difference. Is there any similar methods available in postgresql
> > like MyISAM engine ?
>
> You can try unlogged tables:
> http://www.postgresql.org/docs/9.1/static/sql-createtable.html
>
> If specified, the table is created as an unlogged table. Data written
> to unlogged tables is not written to the write-ahead log (see Chapter
> 29), which makes them considerably faster than ordinary tables.
> However, they are not crash-safe: an unlogged table is automatically
> truncated after a crash or unclean shutdown. The contents of an
> unlogged table are also not replicated to standby servers. Any indexes
> created on an unlogged table are automatically unlogged as well;
> however, unlogged GiST indexes are currently not supported and cannot
> be created on an unlogged table.

I would set full_page_writes = off too.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +