Re: connection pools and listener log

  • From: "Radoulov, Dimitre" <cichomitiko@xxxxxxxxx>
  • To: Dave.Herring@xxxxxxxxxx
  • Date: Sat, 26 Feb 2011 12:38:00 +0100

Hi David,
see my posts here:

and here:

Still looking for an answer ...


On 26/02/2011 00:46, Herring Dave - dherri wrote:

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?


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