09 Fév SQL Server 2014 Database Engine: New Features and Enhancements
The Pointer Sisters music probably gave away my true feelings here, but really, folks, I’m so excited. If you’re a DBA on a multi-terabyte database, you’re going to love the SSD buffer pool extensions and the granular index rebuilds. If you’re BI-curious, you’re going to be experimenting with the clustered column store indexes. If you’re a software-as-a-service vendor with lots of clients, you’re going to love failover cluster support for CSVs and query performance improvements.
- The new estimation logic which was designed for the cardinality estimator has improved the quality of the query execution plans and thus has a direct impact on the performance of queries.
- Resource Governor requires Enterprise Edition of SQL Server 2014.
- By using clustered columnstore indexes you will improve your data compression the performance of your query for warehousing workloads that mainly target bulk load operations and queries that are read-only.
- In terms of OS’s which support this feature, you can use either Windows Server 2012 or Windows Server 2012 R2 and also Windows Server 2008 R2 SP2.
- SQL Server 2014 permits statistics creation per partition by setting the INCREMENTAL option to ON inthe CREATE STATISTICS statement.
- That forces us to do some research about the new version’s features in order to make the most accurate decision.
Allows logins to perform SELECT Statements in all databases that the login has CONNECT permission. With the SQL Server 2014 release, we can set constraints on the physical IO operations. This can be defined at the database level, COMMIT level, or ATOMIC block level inNatively Compiled Stored Procedures. sql server 2014 new features for dba Also the following Stored Procedure sys.sp_flush_log is included to flushthe Transaction Log to disk in order to make previously committed transactionsdurable with delayed durability. One welcome addition to SQL Server 2014 is the ability to encrypt database backups for at-rest data protection.
New features added in SQL 2014 (Headings only)
This is why, for some very active databases, we may backup the log every 15 minutes. An on-premises SQL Server can have databases in which its data and log files are stored on Windows Azure Storage. This means that you can move your storage into the cloud while keeping all the transaction processing on your local server. Furthermore you can enableTransparent Data Encryption on databases while keeping the encryption key on the local server for added security.
- I hear a lot of people ask me, “Brent, how can I make my backups slower and less predictable?
- This engine provides a lock and latch free environment for OLTP workloads.
- This isvery useful when you have different workload types amongst the primary and the secondaryreplicas.
- Hekaton enables you to use both disk based tables and Memory-Optimized Tables together in the same queries andstored procedures.
In-Memory OLTP is a strong point of SQL Server 2014 and it promises to be a big boost in database application performance, which is why you should really give it a good thought. The AMR tool has support for collecting data from instances of 2008 and later versions. This is how you can get a good idea of the improvements you can get and also the changes you might need in order to implement this. SQL Server Data Files in Windows Azure will enable you to store native SQL Server database files as Blob files on Windows Azure. SQL Server 2014 has added updatable Clustered Columnstore Indexes. SQL Server 2014 permits statistics creation per partition by setting the INCREMENTAL option to ON inthe CREATE STATISTICS statement.
Managing Locks in Online Index Rebuilds
PostgreSQL is a powerful and versatile open-source relational database that is used by a wide range of businesses and organizations. However, managing a PostgreSQL database can be complex and time-consuming,… The following tableshows some examples of this and the links in the additional information sectioncontain a complete listing. Performance improvements due to added support for multithreading inside the enclaveand key caching.
Also, the new engine has an improved lock-free mechanism that can process transactions for the in-memory tables. This allows ETL processes for data warehouses to write, update and delete records during processing. Additional compression of Columnstore indexes is now available by using Alter Index Rebuild with the COLUMNSTORE_ARCHIVE option. The use of Columnstore indexes requires Enterprise Edition of SQL Server 2014. With regular volumes, only one node can own the volume at any given time.