Обсуждение: SELECT 'DBD::Pg ping test'

Hi All,

This query is being executed nearly a million times....
           SELECT 'DBD::Pg ping test'

Why this is being executed ? What is the use ?

Am sure that this query is not executed explicitly.

am using postgres 8.1

Any idea ?

sathiya psql wrote:
> Hi All,
>
> This query is being executed nearly a million times....
>            SELECT 'DBD::Pg ping test'
>
> Why this is being executed ? What is the use ?

A client is sending a query to the server solely to see if the server
responds.

DBD::Pg is the Perl database driver for PostgreSQL. Presumably the
application using that driver has some sort of keepalive or database
connectivity check enabled, so it's periodically issuing these queries.

--
Craig Ringer

On Wed, Apr 23, 2008 at 12:19 AM, sathiya psql <sathiya.psql@gmail.com> wrote:
> Hi All,
>
> This query is being executed nearly a million times....
>            SELECT 'DBD::Pg ping test'

Something in your Perl application is use $dbh->ping().  See perldoc
DBI.  It's possible that this is happening under the hood, because
your application is using connect_cached() instead of connect().

-jwb