Review recovery models and determine if you need to change it. https://learn.microsoft.com/sql/relational-databases/backup-restore/recovery-models-sql-server'ASRecoveryModelChoice;SELECT'To truncate the log consider performing a transaction log backup on database '+QUOTENAME(@dbname...
Performance and Scalability Row-Level Security in Memory-Optimized Tables Scenarios See Also Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Memory-optimized tables are created usingCREATE TABLE (Transact-SQL). Memory-optimized tables are fully durable by default, and, like t...
Learn the basics of the In-Memory OLTP performance features of SQL Server and Azure SQL Database with quick explanations and core code samples for developers.
Applies to: SQL ServerSQL Server provides objects and counters that can be used by Performance Monitor to monitor In-Memory OLTP activity. The objects and counters are shared across all instances of a given version of SQL Server on the machine, starting in SQL Server 2014 (12.x...
In-Memory OLTP provides full durability for memory-optimized tables. When a transaction that changed a memory-optimized table commits, SQL Server (as it does for disk-based tables), guarantees that the changes are permanent (will survive a database restart), provided the underlying storage is av...
SQL Server Query Store is a performance monitoring tool that helps us evaluate the performance of a SQL query in terms of several different performance metrics such as CPU and Memory Consumption, execution time and the I/O cycles consumed by the query. Query store is similar to the windows “...
ranges of values, and also support retrieving the table rows in the order that was specified when the index was created. They can be used to optimize the performance of queries on memory-optimized tables that use inequality predicates like ‘<’ and ‘>’, a...
若要查看有关内存中 OLTP 潜在性能改进的更全面的演示,请参阅In-Memory OLTP Performance Demo v1.0(内存中 OLTP 性能演示 v1.0)。 本文中的代码示例是单线程的,未能利用内存中 OLTP 的并发利益。 使用并发的工作负荷将带来更高的性能提升。 此代码示例仅显示性能改进的一个方面,即提高了针对插入的数据访问效率...
使用工作,利用進行 INSERT INTO <disk-based table> SELECT FROM <memory-optimized table> 的工作,定期將資料批次卸載到含有叢集資料行存放區索引,以磁碟為基礎的資料表;或 使用暫時的記憶體最佳化資料表管理歷程記錄資料 - 在此模式中,歷程記錄資料會存留於磁碟上,而資料移動是由系統所管理。 SQL ...
SQL Server Statistics and Cost Estimation 统计信息(Statistics)会干扰查询优化器(Query Optimizer)生成最优的执行计划。它存储的是表列或者索引列的数值分布统计,也称为柱状统计Histogram。统计信息的过期或者不充分,都能导致优化器评估成本模型(Cost-Based Estimation)失效。所以我们就要时刻监控统计信息的有效性,采取适...