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Microsoft

DP-700 · Question #59

You have a data warehouse that is experiencing performance issues during data loading. The data warehouse is using a partitioned table. You have noticed that the data loading process is taking a…

The correct answer is A. Increase the number of partitions in the table. To improve data loading performance into a partitioned table, increasing the number of partitions can enable greater parallelism for write operations, thus speeding up the overall process.

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Question

You have a data warehouse that is experiencing performance issues during data loading. The data warehouse is using a partitioned table. You have noticed that the data loading process is taking a long time. Which of the following actions would be most effective in improving data loading performance ?

Options

  • AIncrease the number of partitions in the table.
  • BDecrease the number of partitions in the table.
  • CIncrease the number of dataflow units in the pipeline.
  • DIncrease the memory allocation for the pipeline.

How the community answered

(65 responses)
  • A
    75% (49)
  • B
    14% (9)
  • C
    8% (5)
  • D
    3% (2)

Why each option

To improve data loading performance into a partitioned table, increasing the number of partitions can enable greater parallelism for write operations, thus speeding up the overall process.

AIncrease the number of partitions in the table.Correct

Increasing the number of partitions in a table can significantly improve data loading performance, especially in data warehouses. This allows for data to be loaded in parallel into multiple, smaller partitions, reducing contention and improving throughput for write operations.

BDecrease the number of partitions in the table.

Decreasing the number of partitions would likely reduce the potential for parallelism during data loading, which would worsen performance.

CIncrease the number of dataflow units in the pipeline.

Increasing dataflow units in a pipeline primarily enhances the computational resources for the transformation logic before loading, but does not directly optimize the parallel loading capability into the partitioned table itself.

DIncrease the memory allocation for the pipeline.

Increasing memory allocation for the pipeline might help with in-memory processing within the pipeline, but it is not a direct or primary method to optimize the parallel loading mechanism into a partitioned data warehouse table.

Concept tested: Data warehouse partitioning for loading performance

Source: https://learn.microsoft.com/en-us/azure/synapse-analytics/sql/best-practices-sql-pool-partitioning

Topics

#Data Loading Optimization#Table Partitioning#Data Warehouse Performance#Parallel Processing

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