Introduction

Microsoft SQL Server 2019, when deployed on Windows Server 2019, offers a robust and scalable database solution tailored for enterprises managing both traditional relational databases and big data workloads. This review delves into its performance enhancements, cost implications, and feature set, providing a comprehensive analysis for organizations considering this platform.

Performance Enhancements

Intelligent Query Processing (IQP)

SQL Server 2019 introduces Intelligent Query Processing, a suite of features designed to optimize query performance without requiring changes to existing code. Key components include:

  • Batch Mode on Rowstore: Enhances performance for analytical queries by processing data in batches, reducing CPU usage.
  • Scalar UDF Inlining: Transforms scalar user-defined functions into relational expressions, mitigating performance issues associated with function calls.
  • Table Variable Deferred Compilation: Improves plan quality by deferring the compilation of table variables until actual cardinality is known.

These enhancements collectively contribute to faster query execution and more efficient resource utilization.

Accelerated Database Recovery (ADR)

ADR significantly reduces the time required for database recovery, regardless of transaction volume or duration. By utilizing a persistent version store, ADR enables rapid rollback of transactions and minimizes downtime during recovery processes.

Memory-Optimized TempDB Metadata

For workloads heavily reliant on TempDB, SQL Server 2019 offers memory-optimized TempDB metadata, reducing contention and improving scalability. This feature is particularly beneficial for systems with high concurrent activity.

Feature Set

Big Data Clusters

A standout feature in SQL Server 2019 is the introduction of Big Data Clusters, which integrate SQL Server with Apache Spark and Hadoop Distributed File System (HDFS). This integration allows organizations to:

  • Store and Analyze Big Data: Manage large volumes of data directly within SQL Server.
  • Data Virtualization: Query external data sources without moving or copying data, facilitating real-time insights.
  • Integrated AI and Machine Learning: Utilize built-in tools for data science and machine learning tasks.

Data Virtualization with PolyBase

PolyBase enables querying of external data sources such as Oracle, MongoDB, and Teradata using T-SQL, eliminating the need for complex ETL processes. This feature simplifies data integration and provides a unified querying experience across diverse data platforms.

Enhanced Security Features

Security remains a priority in SQL Server 2019, with enhancements including:

  • Always Encrypted with Secure Enclaves: Allows computations on encrypted data without exposing the data to the SQL Server instance, enhancing data privacy.
  • Data Discovery and Classification: Helps identify and classify sensitive data, aiding in compliance with regulations like GDPR.
  • Transparent Data Encryption (TDE): Now available in Standard Edition, TDE encrypts data at rest, providing an additional layer of security.

Cost Considerations

While SQL Server 2019 offers a rich feature set, cost considerations are crucial:

  • Licensing Costs: SQL Server operates on a per-core licensing model, which can become expensive as system requirements scale. Organizations must assess their needs to determine the most cost-effective edition.
  • Edition Limitations: Advanced features such as Big Data Clusters and online indexing are exclusive to the Enterprise Edition. The Standard Edition, while more affordable, lacks these capabilities, potentially impacting performance and scalability for certain workloads.

Deployment on Windows Server 2019

Deploying SQL Server 2019 on Windows Server 2019 provides several advantages:

  • Enhanced Performance: Windows Server 2019 offers improved performance features that complement SQL Server 2019's capabilities.
  • Security Integration: The combination enhances security through features like Windows Defender Advanced Threat Protection.
  • Container Support: Both platforms support containerization, facilitating modern deployment practices and scalability.

Conclusion

Microsoft SQL Server 2019 on Windows Server 2019 presents a powerful solution for organizations seeking a comprehensive database platform capable of handling diverse workloads. Its performance enhancements, advanced features, and integration capabilities make it a compelling choice. However, organizations must carefully evaluate licensing costs and edition limitations to ensure alignment with their specific requirements and budget constraints.