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Table 13-7 Table Schema Change May Increase Its Accessing Time findings 

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Description
What to do

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nextIn the SQL tab, examine the information displayed in the History tab to identify object changes and correlate these changes to performance degradation.

 

 

 

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Advice

Several changes may effect In MS-SQL time and may effect other statements In MS-SQL as well. Changes such as index creation/drop can cause access plan changes that can effect statement performance. Do the following:

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  • Identify the change in the History tab

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  • Compare statement or batch execution plans in the Compare tab.

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StatementIsNotScalable

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StatementIsNotScalable
Statement Is Not Scalable

Statement resource consumption was increased by n% as a result of an increase in its executions. 

Table 13-8    Statement 8 Statement Is Not Scalable findings 

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Description
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next

Perform one of the following options:

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  • Examine scalability by analyzing degradation in average duration for statement resulting from an increase in the number of executions.

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  • Check the program executing the statement and try to identify application changes.

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  • Explore other statement or batch execution identifiers, such as, machine or users, in the Activity tab.
Advice

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Perform the following options:

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  • Try to determine if this is a pure scalability issue. Increase the time frame and explore statement scalability over a larger period of time. If it is a problem of scalability, this can be treated in many ways.

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  • For example, you can avoid unscalable operations, such as table scans, in an execution plan.

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  • Eliminate concurrency by distributing the operation of the application over several MS-SQL

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  • servers.

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Table Growth May Increase Its Accessing Time

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