RE: Slow performance of code using dblinks ver 8.1.6.2

From: Haunschmidt Andreas VASL/FAS <Andreas.Haunschmidt_at_voest.co.at>
Date: Tue, 27 Feb 2001 11:32:09 -0800
Message-ID: <F001.002BEA25.20010227102650@fatcity.com>

Hi Rafiq!

Thanks for sending me your PL/SQL code.
You do a lot of aggregations over the dblink, also remote joins can be slow.

Suggestion:
  Reverse the situation, do the selects local and insert remote.   Run the code on the 7.3.4.5 instance without @OLAP_APPS_LINK in selects   and insert into the same table (now with a new database link for the 8.1.6.2 instance):
  INSERT INTO HAR_ATB_ITEMS_at_8_1_6_2_instance_dblink ...   You can still invoke the code from the 8.1.6.2 instance, if you create a procedure
  on the 7.3.4.5 instance:
  replace the 'DECLARE' by
'CREATE OR REPLACE PROCEDURE MYPROC IS'   and invoke it remotely from the 8.1.6.2 instance:

BEGIN
MYPROC_at_8_1_6_2_instance_dblink
END;
/

This should execute the queries in the local instance only and thus consume only the local resources.
I'd like to know , if this affects performance.

Good Luck!

Andreas

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Author: Haunschmidt Andreas VASL/FAS
INET: Andreas.Haunschmidt_at_voest.co.at

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