On Wednesday 12 July 2006 01:33, Thomas Radnetter wrote:
> Hello!
>
> We're facing a performance problem here in a Oracle 10g -> PostgreSQL
> environment. The Oracle DB accesses the PostgreSQL DB via UnixODBC +
> psqlODBC.
>
> There are some 100 records on the Oracle DB to be updated with data
> obtained from a view of the PostgreSQL DB. The fetched data accumulates to
> a few kB's and the update takes some 5 - 7 hours. During this time the
> PostgreSQL machine is running at approx. 100% CPU usage.
> If a select for the same data is issued from the Oracle DB the statement is
> executed in half a second.
>
> Is this the correct place to issue this problem?
Sure but you haven't provided a TON of information that would be needed to
help?
If you execute the same query that is being executed via ODBC, via psql is the
performance problem still there?
If so, you probably have a postgresql issue, otherwise look at Oracle or ODBC.
If it is a PostgreSQL issue:
Do you have indexes applied?
What is the explain plan?
When was the last time you analyzed?
What about vacuum?
etc. etc.
Sincerely,
Joshua D. Drake
>
> How can I trace down the cause for this performance problem?
>
> Thanx in advance!
>
> Regards,
> Thomas Radnetter
>
> p.s. Mr. Ludek Finstrle, can you help again?
>
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