On Fri, 21 Oct 2011 12:20:19 -0400
Bryan Varner <bvar...@polarislabs.com> wrote:
> >> If I could get master_slave&& load_balance working with the JDBC
> >> drivers, this would be an incredible tool to have.
> >>
> > Is autocommit setting of your application true?
> > If so, can you set autocommit to false by using setAutoCommit(false)?
> >
>
> Your suggestion is the opposite of what the pgpool documentation states:
>
> "Note: the JDBC driver has an autocommit option. If autocommit is
> false, the JDBC driver sends "BEGIN" and "COMMIT" by itself. So pgpool
> cannot do any load balancing. You need to call setAutoCommit(true) to
> enable autocommit."
That description is in "Replication Mode" section. You are using
master/slave mode. pgpool-II 3.0 or later can do load balancing
in master/slave mode, even if setAutoCommit(false).
> I have tried both methods (with load_balance off) and still get the same
> results. The standby is only receiving BEGIN and COMMIT/ROLLBACK statements.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I think that this behavior avoids ""S_xx" does not exist" error in standby.
How about trying setAutoCommit(false) with load_balance on?
> My application is currently using c3p0, and I'm doing
> setAutoCommit(false/true) with a connection customizer class. Is tere a
> recommended java connection pool to use outside of a j2ee container with
> pgpool? Has anyone else reported success getting selects sent to the
> standby server with dbcp or even the postgres jdbc driver connection pool?
>
> Regards,
> -Bryan
>
--
Toshihiro Kitagawa
SRA OSS, Inc. Japan
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