Discover which category in Snowflake’s Query Profile displays the time spent on setting up query processing. Learn about initialization, processing, synchronization and local disk I/O to understand query performance.
Table of Contents
Question
Which Query Profile category displays the time spent setting up the query processing?
A. Initialization
B. Processing
C. Synchronization
D. Local Disk IO
Answer
A. Initialization
Explanation
In Snowflake, the Query Profile provides a breakdown of the time spent in different stages of query execution. The “Initialization” category specifically displays the time spent on setting up the query processing.
This includes tasks like parsing the SQL statement, creating the execution plan, acquiring locks, and distributing the execution plan to the compute nodes. The initialization phase happens before any actual data processing or computation occurs.
The other categories mentioned:
- Processing: Displays the time spent on actual execution of the query, scanning data and performing computations.
- Synchronization: Shows time spent on synchronization between compute nodes, like data exchange.
- Local Disk IO: Represents time spent reading from and writing to local storage on compute nodes during query processing.
So in summary, the Initialization category is what captures the setup time prior to query execution, making A the correct answer. Analyzing the time spent in each category helps optimize queries by identifying bottlenecks in different execution stages.
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