Too many db calls

From: Greg Moore <sqlgreg_at_pacbell.net>
Date: Fri, 15 Nov 2002 14:39:16 -0800
Message-ID: <F001.00504C98.20021115143916@fatcity.com>

A while back someone mentioned that the two main causes of slow SQL are excesive LIO's and excesscive database calls, which show up as excessive CPU use and excessive network traffic, respectively.

Regarding the database calls, is there a "classic" reason for this problem?

My best guess is it's caused by an SQL statement in a PL/SQL loop, which could be rewritten as a single SQL statement. But is this the single, commonly seen cause for this problem, or are there other common ways this inefficiency is introduced?

Thanks in advance for help in understanding this.

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Author: Greg Moore
  INET: sqlgreg_at_pacbell.net

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