SSAS Performance Metrics
Overview
This article covers the various SSAS performance metrics displayed by the Performance Analysis Dashboard and Performance Analysis Overview, and how to interpret different metric values and combinations of values across different metrics for SQL Sentry.
Note: For Mode: S = Sample and H = History.
SSAS Metrics for Tabular and Multidimensional Modes
SSAS Metrics for Tabular Mode Only
Section | Metric | Description | ||||
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SSAS Memory | Mem Usage (MB): VertiPaq paged |
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SSAS Memory | Mem Usage (MB): VertiPaq nonpaged |
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SSAS Memory | Cache Activity: Dim Cache Lookups |
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SSAS Memory | Cache Activity: Calc Cache Lookups |
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SSAS Metrics for Multidimensional Only
Section | Metric | Description | ||||
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SSAS General | Processing: Proc rows Written / Sec |
Displays the rate of Processing rows written during processing. Processing in SSAS Involves the SE, and can cause the Cache to become outdated and flushed. This causes a performance hit because when the query is run after processing completes, the SE has to retrieve the necessary data from the Windows file cache or from disk (cold cache). Non 0 values on the indicate that processing is taking place. These metrics can also help determine the effectiveness of any processing tuning efforts. If your tuning efforts are effective, you should see an increase in these values accordingly. Processing can be improved by:
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SSAS General | Processing: Index rows created |
Displays the rate of rows from MOLAP files used to create indexes. Processing in SSAS Involves the SE, and can cause the Cache to become outdated and flushed. This causes a performance hit because when the query is run after processing completes, the SE has to retrieve the necessary data from the Windows file cache or from disk (cold cache).Non 0 values on the indicate that processing is taking place. These metrics can also help determine the effectiveness of any processing tuning efforts. If your tuning efforts are effective, you should see an increase in these values accordingly. Processing can be improved by:
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SSAS General | Processing: Aggregate rows created | Displays the rate Aggregate rows are created during processing. Processing in SSAS involves the SE, and can cause the Cache to become outdated and flushed. This causes a performance hit because when the query is run after processing completes, the SE has to retrieve the necessary data from the Windows file cache or from disk (cold cache).Non 0 values on the indicate that processing is taking place. These metrics can also help determine the effectiveness of any processing tuning efforts. If your tuning efforts are effective, you should see an increase in these values accordingly. Processing can be improved by:
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SSAS Memory | Cache Lookups: Dimension |
The rate of cache lookups.
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SSAS Memory | Cache Lookups: Measure grp |
The rate of Measure group queries.
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SSAS Memory | Cache Lookups: Calc |
The rate of calculation cache lookups, including global, session, and query scope calculation caches.
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SSAS Memory | Cache Lookups: Flat |
The rate of Flat Cache lookups, including global, session, and query scope flat caches.
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SSAS Memory | Cache Activity: Flat Cache inserts |
The rate of insertions into the cache. Note: This is per partition per cube per database.
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SSAS Storage | File Queries by Category | .
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SSAS Storage | Current Partitions by Category |
The amount of partitions during querying.
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