Re: connection pools and listener log
- From: Stephane Faroult <sfaroult@xxxxxxxxxxxx>
- To: Dave.Herring@xxxxxxxxxx
- Date: Sat, 26 Feb 2011 09:01:31 +0100
Dave,
I have seen in the past a lot of paranoid applications (application
servers among others) regularly issuing dummy queries to check that the
database is still here (I won't comment). Perhaps your application
servers are happily issuing "tnsping" very often.
Stephane Faroult
RoughSea Ltd <http://www.roughsea.com>
Konagora <http://www.konagora.com>
RoughSea Channel on Youtube <http://www.youtube.com/user/roughsealtd>
On 02/26/2011 12:46 AM, Herring Dave - dherri wrote:
> Folks,
>
> I'm trying to match up database logons with what I'm seeing in the local
> listener log and coming up way short, so hopefully one of you can enlighten
> me.
>
> Our configuration is Oracle 10gR2 on RHEL 4.6. There are a number of
> application servers that connect using a connection pool. I reviewed AWR
> "logons cumulative" statistic recently and saw that 1 instance regularly gets
> around 1,000 per hr. Checking the local listener log for "established" I
> found a number more like 10,000 per hour. How can that be? Don't
> "established" connections via the listener have to match up with the database
> "logons cumulative"? If not, what is it that's being sent by the application
> that the listener sees as a request to "establish" a connection but not
> really connect to the database?
>
> Thx.
>
> DAVID HERRING
> DBA
> Acxiom Corporation
> EML dave.herring@xxxxxxxxxx
> TEL 630.944.4762
> MBL 630.430.5988
> 1501 Opus Pl, Downers Grove, IL 60515, USA
> WWW.ACXIOM.COM
>
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