Hard to say what is going on here but me things you are running into the
'ping' problem
Are you using Apache::DBI??
Many of these warehouse applictions reuse the same connection handel and
to keep them alive they use $dbh->ping which runs a query to maintain
the connection.
What version of DBD::Oracle are you using?
If you can upgrade to DBD::Oracle 1.22 (do not use 1.23 there is a bug
in there that might be worse) or get the latest 1.24 version
that might solve your problem
cheers
John Scoles
Matthew Maglinte wrote:
I'm a dba supporting a warehouse database (production environment)
accessed via a custom application built on open source components, one of
which is dbd::oracle.
Performance monitoring shows two queries continually consuming
considerable resources (cpu waits) - the query text resembling for the
most part 'column_info' and 'table_info'. Over any given day, the
column_info select is executed +260 times an hour, 'table_info' executed
+360 times an hour.
Is this level of frequency intended? And are these calls appropriate
(expected) for a static data dictionary environment?
Any response that would help my understanding would be appreciated.
Thanks.
Matt Maglinte
DBA - PeMS/LCS
Department of Transportation
W:(916)445-0090
matthew_magli...@dot.ca.gov
