Specify a Maximum Cost for a Query in SQL Server 7
Ever had a user accidentally create a query that resulted in a
Cartesian product of your two largest tables? Of course, a badly
written query uses up precious CPU and I/O cycles and therefore slows
everyone down. With the advent of SQL Server 7, you can specify a
maximum cost for a query. You can do this in two ways. First, set a
maximum cost for all queries on your server by setting the
configuration option “query governor cost limit” to the maximum number
of seconds allowed for a query. (For those of you not familiar with
the sp_configure command, this can be done through Enterprise Manager
by right clicking on a Server, choosing Properties, clicking the
Server setting tab, and choosing the “Use query governor…” check box
and entering a non-zero number in the box.) For a specific connection,
use “SET QUERY_GOVERNOR_COST_LIMIT value”.
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