[pgpool-general: 532] Re: Hibernate and pgpool-II

David Kerr dmk at mr-paradox.net
Tue May 29 03:31:41 JST 2012

On 05/27/2012 10:31 AM, David Kerr wrote:
> On 5/27/2012 10:28 AM, Ludger Overbeck wrote:
>> Hi,
>> I would like to know if anybody has ever used pgpool-II (in Replication
>> Mode or Master/Slave Mode) with Hibernate? Does this cause any problems?
>> As far as I know in Hibernate SQL-statements (which are sent to the
>> database) are always issued in an explicit transaction. And as the FAQ
>> for pgpool says, that would mean that there is no load balancing in
>> replication mode. Is that correct?
>> Instead I am thinking about using the Master/Slave mode with synchronous
>> streaming replication to avoid that selects deliver stale data (as with
>> asynchronous replication). Would this work?
>> Thanks for your replies.
> I've started some testing with Hibernate + PgPool II in load balance /
> master server mode with async Streaming Replication and so far the
> results have been positive.
> Dave

Update on this:

Even though my test appeared to be load balancing, the log files show 
that, in fact, it was not.

I suspect it's as you mentioned the explicit transactions in hibernate. 
(I'm in Master/Slave mode.)


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