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Which of the following controls would it be relevant fo…

An IS auditor finds that, at certain times of the day, the data warehouse query performance
decreases significantly. Which of the following controls would it be relevant for the IS auditor to
review?

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A.
Permanent table-space allocation

B.
Commitment and rollback controls

C.
User spool and database limit controls

D.
Read/write access log controls

Explanation:
User spool limits restrict the space available for running user queries. This prevents poorly formed
queries from consuming excessive system resources and impacting general query performance.
Limiting the space available to users in their own databases prevents them from building
excessively large tables. This helps to control space utilization which itself acts to help performance
by maintaining a buffer between the actual data volume stored and the physical device capacity.
Additionally, it prevents users from consuming excessive resources in ad hoc table builds (as
opposed to scheduled production loads that often can run overnight and are optimized for
performance purposes), in a data warehouse, since you are not running online transactions,
commitment and rollback does not have an impact on performance. The other choices are not as
likely to be the root cause of this performance issue.


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