Hmmm - I did a little jmeter test and definitely saw an improvement in page
view performance and saw activity on multiple DB connections during the
test. By simply adding the connection broker with a single OSC.
If I set up object store pooling wont that increase issues with concurrency
within my app? I.e. Trying to update data that has already been updated in a
different OSC?
I am using the Jgroups synchronizer between instances already.
Would the following set of properties be consistent with each other:
er.extensions.ERXObjectStoreCoordinatorPool.maxCoordinators = 10
er.extensions.ERXJDBCAdaptor.className=er.extensions.jdbc.ERXJDBCAdaptor
er.extensions.ERXJDBCAdaptor.useConnectionBroker = true
er.extensions.remoteSynchronizer.enabled=true
er.extensions.remoteSynchronizer=er.jgroups.ERJGroupsSynchronizer
dbMinConnectionsGLOBAL=10
dbMaxConnectionsGLOBAL=15
er.extensions.ERXJDBCConnectionBroker.maxConnections=15
er.extensions.ERXJDBCConnectionBroker.minConnections=10
If I understand what is going on I should get 10 EOF stacks sharing a pool
of 15 database connections. I assume there is some magic running behind the
scenes to keep all of the OSC in sync with each other?
Thanks again
Dov Rosenberg
On 8/26/10 9:00 PM, "Mike Schrag" <mschra..obox.com> wrote:
> Connection pooling won't really do anything for you because each stack is
> single threaded. You want object store coordinator pooling.
>
> Sent from my iPhone
>
> On Aug 26, 2010, at 8:45 PM, Dov Rosenberg <DRosenber..nquira.Com> wrote:
>
>> During some testing today I turned on support for connection pooling in my
>> application using the ERXJDBCAdaptor and the ERXJDBCConnectionBroker. I could
>> see the connections being used fine and all of the things that did fetches
>> seemed to work without any issues. However when I tried doing something that
>> generated an INSERT the transactions did not commit and no changes were made.
>> I could see the SQL being generated as expected and the saveChanges()
>> happened without throwing any exception just no data got written to the
>> database. As soon as I disabled the use of the connection pool everything
>> worked properly again.
>>
>> Any thoughts would be appreciated
>>
>> Dov Rosenberg
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