Hello guys, hope you are doing well. In this blog I'm going to discuss about the "New features of SQL Server 2022"
The release of the SQL Server 2022 is much anticipated by the
audience since the announcement of it being in the works on November 2nd, 2021.
Although the complete details of this brand-new version will be brought to
light in due time as it is currently in private preview. However, Microsoft has
already disclosed its key features that the audience should look forward to.
Although most of the product’s features are still private,
the released information has introduced some unique new performance-based
features in the SQL Server 2022. Here is a detailed list of what you’d be
working with once you get your hands on the product:
1. Performance Improvement: This feature
enables SQL Server to build better execution plans and potentially multiple
execution plans, the performance of which depends on the parameter values that
are provided at runtime.
The Query Store can now help resolve performance issues related to the
MAXDOP (maximum degree of parallelism) setting, memory grants, and the
cardinality estimator using a feedback cycle to adapt and improve query
execution plans. Finally, Query Store now supports availability group (AG)
read-only replicas.
2. High Availability and Connection Improvements: In SQL Server
2022, you may construct a distributed AG between an on-premises SQL Server and
an Azure SQL Managed Instance (MI) for use as a disaster recovery backup server
or as a read-only replica for reporting workloads, making high availability
even better. With a few clicks, you may manually failover to the MI and back to the
on-prem SQL Server.
3. Security and Governance Improvements: Using "blockchain" technologies, the new functionality creates an immutable record of data alterations throughout time. This safeguards data from tampering, which is important in some contexts and use cases, as well as providing benefits for internal and external audits. Microsoft's initial feature set has been developed into a more comprehensive data governance platform. Purview now has tighter integration with SQL Server and Azure SQL, allowing you to scan SQL Server for metadata, classify data using common classifier labels and tagging (such as PII or HIPAA data), and configure and control specific SQL Server access rights and privileges from a single Azure Purview console.
4. Query Store and Intelligent Query Processing: The SQL Server 2022 ensures that
the Query Store will be available on all new databases on the server. It
addresses the common issue in the previous models by allowing write access from
readable secondaries. This feature will enable transparency into activity on
secondary replicas. However, if a database from the older version of SQL is accessed,
the Query Store will have to be manually enabled.
5. Parameter Sensitive Plan Optimization: In older SQL Server versions, input parameters at the time of
storage had an impact on certain stored processes. Parameter Sniffing was the
popular name for this problem. One of the unique features of SQL Server 2022 is
the Parameter Sensitive Plan Optimization, which allows you to cache multiple
parameter-sensitive queries while procedures are being saved. This will assist
you avoid having to alter your code by using the recompile option or allocating
the values of the input parameter to variables within the procedure.
6. TempDB and Latch: During SQL Service Performance
Tuning in older SQL server versions, 1 out of 10 clients would struggle with
TempDB and Latch. Although you can address it in multiple ways, the practice took valuable time
and energy. The SQL Server 2022 addresses these issues by enhancements to the
TempDB database and the Memory Optimized TempDB Metadata. Experts are hopeful
that clients will not struggle with these issues with the release of this new
version.
7. Bidirectional HA/DR to Azure SQL Managed
Instance: For enhanced data backup and
security, SQL Server 2022 adds Bidirectional HA/DR to Azure SQL Managed
Instance. It allows you to connect a database to the cloud in only a few
clicks. This not only saves money, time, and labour by eliminating the
technicalities of data storage via hardware and virtual machines, but it also
encourages better backup and recovery methods. It creates an Availability Group
(AG) between a SQL Server and an on-premises Azure SQL Managed Instance.
8. Azure Synapse Link: The Azure Synapse Link helps move
data from an on-premises SQL Server to Synapse without ETL. It captures the
changes in the server and feeds them to Azure Synapse Analytics. The
Synapse link puts minimal strain on operating systems when conducting real-time
analysis and analytical processing. It fastens data transfer and increases the
connectivity of the data to other robust analytic programs.
9. SQL Server Ledger: In comparison to the competition, SQL Server has experienced fewer security concerns in the recent decade. The new SQL Server Ledger, on the other hand, secures data even further by maintaining an immutable record of any changes made to the data or stored processes. The ledger prevents unauthorized parties from tampering with or corrupting the data, lowering the chance of a security breach.
10.Multi-Write Replication: Previously, when rewritten data clashed with different clones
of the same database, the dispute had to be manually resolved. SQL Server 2022,
on the other hand, addresses this problem by adding the concept of 'last write
wins.' As a result, if a conflict between duplicates arises, the most recent
rewrite will take precedence and be copied to all copies.
--By Harigovind Gupta (Software Engineer)
Clota Technology
