Databases Reference
In-Depth Information
Typically, these queries exhibit the following traits:
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Long running from a perspective of time
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A lot of I/O action
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Multiple cycles of read
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Heavily skewed joins
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Minimal computes
Wide/Narrow
Wide/narrow workloads are queries that are generated by standard reports and dashboards and run
execution on wide columns from more than two tables returning a narrow set of columns in the result
set. The resulting complexity from these queries are impacted by the:
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Length of the source table
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Distribution of the table across the storage
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Data model
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Data relationship
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Computation
Typically, these queries exhibit the following traits:
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Medium cycles of execution (running from a perspective of time)
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High memory consumption
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Mixed CPU utilization
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Lot of computes
Narrow/Wide
Narrow/wide workloads are queries generated by ad-hoc users or analytic users and run execution on
a narrow set of columns from two to four tables returning a wide set of columns in the result set. The
resulting complexity from these queries are impacted by the:
●
Length of the table
●
Distribution of the table across the storage
●
Data model
●
Data relationship
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Time dimension
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Semantic layer functionality
Typically, these queries exhibit the following traits:
●
Long running (from a perspective of time)
●
Mixed I/O
●
Multiple cycles of read
●
Heavily skewed joins
●
Heavy computes
