Monitoring Application Logs in Databricks

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Questions and Answers

What is the primary goal of assigning a larger resource class to automated data load queries in Azure Synapse Analytics?

To ensure automated data loads complete quickly and successfully (correct)
To create sampled statistics for every column in each table
To reduce the maximum memory per query
To increase concurrency

What is the impact of a smaller resource class on the performance of a query in Azure Synapse Analytics?

It reduces the maximum memory per query but increases concurrency (correct)
It increases the maximum memory per query
It creates sampled statistics for every column in each table
It has no impact on the performance of a query

What is the purpose of Dropwizard counters and gauges in Azure Databricks monitoring?

To troubleshoot Backlogged input Events in Azure Stream Analytics
To track performance metrics in Azure Databricks (correct)
To monitor application logs
To create sampled statistics for every column in each table

What does an increasing Backlogged input Events metric indicate in an Azure Stream Analytics job?

The job is experiencing performance issues (A) Signup and view all the answers

What is the primary goal of creating sampled statistics for every column in each table in Azure Synapse Analytics?

To improve query performance (B) Signup and view all the answers

What is the recommended distribution type for a fact table in Azure Synapse Analytics if the table size on disk is more than 2 GB?

Hash (D) Signup and view all the answers

What is the impact of hashing large fact tables in Azure Synapse Analytics on data loads?

It improves data load performance (C) Signup and view all the answers

What is the purpose of building the spark-listeners-loganalytics-1.0-SNAPSHOT.jar JAR file in Azure Databricks monitoring?

To monitor application logs (C) Signup and view all the answers

What type of index is recommended for a columnstore table in Azure Synapse Analytics for optimal query performance?

Clustered Columnstore (C) Signup and view all the answers

What is the benefit of using a date dimension table in a data warehouse?

Simplified data analysis (A) Signup and view all the answers

What is the primary goal of optimizing data loads in Azure Synapse Analytics?

To ensure automated data loads complete quickly and successfully (B) Signup and view all the answers

What is the primary purpose of a star schema in a data warehouse?

To simplify data analysis (D) Signup and view all the answers

What is the recommended distribution type for a fact table in Azure Synapse Analytics if the table has frequent insert, update, and delete operations?

Hash (A) Signup and view all the answers

What is the benefit of using a clustered columnstore index in Azure Synapse Analytics?

Faster query performance (B) Signup and view all the answers

What is the primary purpose of an Azure Data Factory pipeline?

To trigger data processing tasks (A) Signup and view all the answers

What is the recommended frequency for triggering an Azure Data Factory pipeline if the data is updated hourly?

Hourly (B) Signup and view all the answers

What is the default number of workload groups created when SQL Server is installed?

Two (C) Signup and view all the answers

What is the purpose of Resource Governor in SQL Server?

To manage workload groups and resource pools (B) Signup and view all the answers

What is the cause of performance issues in an Azure SQL database according to the Intelligent Insights diagnostics log?

TempDB contention (A) Signup and view all the answers

What is a recommended solution to alleviate tempDB contention in an Azure SQL database?

Implementing memory-optimized tables (D) Signup and view all the answers

What is the purpose of the Intelligent Insights diagnostics log in an Azure SQL database?

To troubleshoot tempDB contention (A) Signup and view all the answers

What is a common issue that can cause performance issues in an Azure SQL database?

TempDB contention (D) Signup and view all the answers

What is a recommended step to take when troubleshooting tempDB contention in an Azure SQL database?

Stop using temporary tables (D) Signup and view all the answers

What is the benefit of using memory-optimized tables in an Azure SQL database?

Improved query performance (C) Signup and view all the answers

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Study Notes

Building Spark-Listeners-Loganalytics JAR

Build the spark-listeners-loganalytics-1.0-SNAPSHOT.jar JAR file
Create Dropwizard counters or gauges in the application code for monitoring and logging purposes

Azure Synapse Analytics

Assign a larger resource class to automated data load queries to ensure they have enough memory to complete quickly and successfully
Smaller resource classes reduce maximum memory per query but increase concurrency
Larger resource classes increase maximum memory per query but reduce concurrency

Azure Stream Analytics

Monitor the Backlogged input Events metric to ensure it's not increasing slowly and consistently non-zero

Designing an Enterprise Data Warehouse

For a star schema fact table, recommend a hash-distributed table with a clustered columnstore index for the fastest query performance
Consider using a hash-distributed table when the table size on disk is more than 2 GB and has frequent insert, update, and delete operations
Clustered columnstore tables offer both the highest level of data compression and the best overall query performance

Azure Data Factory

Use resource pools to manage workload groups and resource governance
Resource Governor supports user-defined workload groups

Azure SQL Database

Implement memory-optimized tables to resolve performance issues due to tempDB contention
TempDB contention troubleshooting involves identifying and stopping the use of temporary tables and using memory-optimized tables instead

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