Re: Connection Pooling Problems Dave Page - Mailing list pgsql-odbc

Well,

the application works fine for the time being, however on the server log
reveals:
SMALL
EXTRACT--------------------------------------------------------------------------------------------------
Feb  7 09:17:13 ccbankdb pg[14878]: [2] LOG:  connection received:
host=10.10.124.193 port=1306
Feb  7 09:17:13 ccbankdb pg[14878]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:20 ccbankdb pg[14879]: [2] LOG:  connection received:
host=10.10.124.193 port=1307
Feb  7 09:17:20 ccbankdb pg[14879]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:21 ccbankdb pg[14880]: [2] LOG:  connection received:
host=10.10.124.193 port=1308
Feb  7 09:17:21 ccbankdb pg[14880]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:22 ccbankdb pg[14881]: [2] LOG:  connection received:
host=10.10.124.193 port=1309
Feb  7 09:17:22 ccbankdb pg[14881]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:22 ccbankdb pg[14882]: [2] LOG:  connection received:
host=10.10.124.193 port=1310
Feb  7 09:17:22 ccbankdb pg[14882]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:23 ccbankdb pg[14883]: [2] LOG:  connection received:
host=10.10.124.193 port=1311
Feb  7 09:17:23 ccbankdb pg[14883]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:24 ccbankdb pg[14884]: [2] LOG:  connection received:
host=10.10.124.193 port=1312
Feb  7 09:17:24 ccbankdb pg[14884]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:24 ccbankdb pg[14885]: [2] LOG:  connection received:
host=10.10.124.193 port=1313
Feb  7 09:17:24 ccbankdb pg[14885]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:25 ccbankdb pg[14886]: [2] LOG:  connection received:
host=10.10.124.193 port=1314
Feb  7 09:17:25 ccbankdb pg[14886]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank
Feb  7 09:17:26 ccbankdb pg[14887]: [2] LOG:  connection received:
host=10.10.124.193 port=1315
Feb  7 09:17:26 ccbankdb pg[14887]: [3] LOG:  connection authorized:
user=sdoherty database=ccbank

Since there are cells in EXCEL each containing a query, The server gets hit
with a connection request per query. This
in turn originally exceeded the maximum connections supported by my
configuration on the server. I raised the number of
connections supported to 500, however this seems like a work around which
may resurface again soon.

I have verified that POOLING is turned on in the ODBC driver from the
ODBC-ADMIN tool.

I am looking for ideas on how to further determine what is actually not
working. Is it something in the driver ? or Is it something to do with
EXCEL's handling of queries.

Jim

----- Original Message -----
From: "Jeff Eckermann" <jeff_eckermann@yahoo.com>
To: "James M Doherty PGADMIN" <jimmyd@jdoherty.net>;
<pgsql-odbc@postgresql.org>
Sent: Wednesday, February 23, 2005 10:11 AM
Subject: Re: [ODBC] Connection Pooling Problems Dave Page


> --- James M Doherty PGADMIN <jimmyd@jdoherty.net>
> wrote:
>
>>
>> DOES ANYONE HAVE ANY EXPERIENCE WITH THIS .... DAVE
>> PAGE? ANYONE...
>
> More information would be good.  Relevant code,
> relevant extracts from log files.  What is the
> application actually doing, when the problem occurs?
>
>>
>> Jim
>> >>
>>   ----- Original Message -----
>>   From: James M Doherty PGADMIN
>>   To: pgsql-odbc@postgresql.org
>>   Sent: Wednesday, February 16, 2005 12:18 PM
>>   Subject: [ODBC] Connection Pooling Problems
>>
>>
>>   I have an application that uses the ODBC interface
>> from a window XP machine. I have set connection
>> pooling on the pgsql driver to on with
>>   a timeout of 120 seconds. This is being called
>> from an Excel spread sheet. When the user refreshes
>> the spread sheet I get hundreds of
>>   connections logged in /var/log/messages from the
>> user. There are about 200 queries which try to
>> execute at close to the same time.
>>
>>   As a temporary measure I have increased the number
>> of simultaneous connections to 500 to support this,
>> however it does not look like
>>   connection pooling is working correctly. Any ideas
>> on how I might diagnose this, or is there a known
>> fix for this type of problem.
>>
>>   I am running 7.4 and 7.03.01.00 of the ODBC
>> driver.
>>
>>   Thanks for any help you can give me !
>>
>>   Jim
>>
>>
>>
>>   James M Doherty
>>   jim@jdoherty.net
>>   Georgetown, TX 78626
>>   "There is no luck without discipline" IRISH
> PROVERB
>
>
>
>
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