Simon Riggs wrote:
>
> On Tue, 2009-04-14 at 00:06 +0000, Alvaro Herrera wrote:
> > Log Message:
> > -----------
> > pg_restore -jN does not equate "multiple jobs", so partly revert the
> > previous patch.
>
> I notice that the release notes talk about "parallel restore", yet the
> word parallel is not used in the docs anywhere. The section on restoring
> a dump makes no mention of this new facility, nor does the perf tips
> section.
>
> Also says that the option doesn't work with --single-transaction, so we
> should say that you've added in TRUNCATE to make the COPY go faster (or
> haven't you? I know we discussed it).
Good point. Documentation patch attached and applied.
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
PG East: http://www.enterprisedb.com/community/nav-pg-east-2010.do
+ If your life is a hard drive, Christ can be your backup. +
Index: doc/src/sgml/perform.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/perform.sgml,v
retrieving revision 1.73
diff -c -c -r1.73 perform.sgml
*** doc/src/sgml/perform.sgml 15 Jan 2010 09:18:59 -0000 1.73
--- doc/src/sgml/perform.sgml 26 Feb 2010 02:31:28 -0000
***************
*** 1027,1033 ****
possibly discarding many hours of processing. Depending on how
interrelated the data is, that might seem preferable to manual cleanup,
or not. <command>COPY</> commands will run fastest if you use a single
! transaction and have WAL archiving turned off.
</para>
</listitem>
<listitem>
--- 1027,1036 ----
possibly discarding many hours of processing. Depending on how
interrelated the data is, that might seem preferable to manual cleanup,
or not. <command>COPY</> commands will run fastest if you use a single
! transaction and have WAL archiving turned off.
! <application>pg_restore</> also has a <option>--jobs</> option
! which allows concurrent data loading and index creation, and has
! the performance advantages of doing COPY in a single transaction.
</para>
</listitem>
<listitem>
