Timeout before connections are put back in the pool ?
Hi,
I am running a test with a single client : the test client send a requests,
wait for the response and when it gets it send another request and so on.
Looking at the connection pool, I can see that up to 8 DB connections
(connection high column in the WL console) have been used during the test
and I'm wondering why.
Our code has the following logic :
- get connection from pool
- execute query
- release connection (done in a finally block)
We're 100% sure the connections get put back in the pool after each
request. Is it possible that it would take some time before the connection
is put back in the pool which would explain why we use more than 1
connection ?
Thanks
-Vincent
"Priscilla Fung" <[email protected]> wrote in message
news:[email protected]...
Hi,
All these attributes are for internal JDBC XA connection pool usages only.
Their main purpose is to work around bugs of various vendor's JDBC XA
drivers. Therefore, by default, it should be turned off. Also, they are
only applicable for TxDataSource with a XA connection pool, not a regular
connection pool.
Which driver are you using?
thanks Priscilla. Ok, so I won't mess with these parameters :-). Are you
confirming that they have nothing to do with the following behaviour :
1/ Start a transaction (entry of transaction-demarcated method)
2/ get a connection from the pool ,
3/ execute the query,
4/ release the connection
5/ get a connection from the pool ,
6/ execute the query,
7/ release the connection
8/ commit the transaction (exit method)
Then, the pool will show that 2 connections were used (and not one as I was
expecting). Joseph confirmed to me that this behaviour was due to the fact
that the connection is not recycled till the end of the transaction. I was
wondering if it had anything to do with these parameters ?
Thanks
-Vincent
Regards,
Priscilla
Vincent Massol <[email protected]> wrote in message
news:[email protected]...
Thanks Joseph. I would have thought that KeepXAConnTillTxComplete was
controlling this behaviour (it is set to false). Isn't that so ? Do youknow
where I could find information on :
KeepXAConnTillTxComplete (currently set to false)
NeedTxCtxOnClose (currently set to false)
NewXAConnForCommit (currently set to false)
XAEndOnlyOnce (currently set to false)
Thanks
-Vincent
"Joseph Weinstein" <[email protected]> wrote in message
news:[email protected]...
Vincent Massol wrote:
Actually, I forgot to mention that we using the following logic :
1/ start transaction (enter method of session bean which is
transaction
enabled)
2/ Perform several JDBC queries
3/ commit transaction (exit of method)
Thus, is it possible that because we're using a Tx DataSource and
transactions, the DB connections from the pool are not recycled
until
the
commit ?Absolutely.
Also, I've found that there are some parameters related to XA :
KeepXAConnTillTxComplete (currently set to false)
NeedTxCtxOnClose (currently set to false)
NewXAConnForCommit (currently set to false)
XAEndOnlyOnce (currently set to false)
As they are set to false, the connections shouldn't be reserved
until
the
commit, right ?
Can someone explain to me (or point me to some doc) where theseparameters
are explained (I have looked a bit everywhere and couldn't find any
information) ?
Thanks
-Vincent
"Vincent Massol" <[email protected]> wrote in message
news:[email protected]...
Hi,
I am running a test with a single client : the test client send arequests,
wait for the response and when it gets it send another request and
so
on.
Looking at the connection pool, I can see that up to 8 DB
connections
(connection high column in the WL console) have been used during
the
test
and I'm wondering why.
Our code has the following logic :
- get connection from pool
- execute query
- release connection (done in a finally block)
We're 100% sure the connections get put back in the pool after
each
request. Is it possible that it would take some time before theconnection
is put back in the pool which would explain why we use more than 1
connection ?
Thanks
-Vincent
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