SQL Server 2014 (12.x) and SQL Server 2016 (13.x) have a limit of 8 indexes per memory-optimized table or table type. Starting with SQL Server 2017 (14.x) and in Azure SQL Database, there is no longer a limit on the number of indexes specific to memory-optimized tables and...
interpreted Transact-SQL. Interpreted Transact-SQL refers to accessing memory-optimized tables without a natively compiled stored procedure. Some examples of interpreted Transact-SQL access include accessing a memory-optimized table from a DML trigger, ad hoc Transact-SQL batch, view, and table-valu...
Whether you're creating a new memory-optimized table or migrating an existing disk-based table to an In-Memory OLTP memory-optimized table, it's important to have a reasonable estimate of each table's memory needs so you can provision the server with sufficient memory. This section describes ...
Provide a supported isolation level for the memory-optimized table using a table hint, such as WITH (SNAPSHOT). SQL Copy SET TRANSACTION ISOLATION LEVEL READ COMMITTED; GO BEGIN TRANSACTION; -- Explicit transaction. -- Order_mo is a memory-optimized table. SELECT * FROM dbo.Order_mo ...
SQL Server 2014 introduces a new manner in which a table can be made available,called a memory-optimized table.doi:10.1007/978-1-4842-1118-2_7Jason StrateGrant FritcheyApress
Referencing a memory-optimized table from an indexed view. Cross-database Cross-database queries Cross-database transactions Linked servers Table Hints For more information about table hints, see. Table Hints (Transact-SQL). The SNAPSHOT was added to support In-Memor...
单个事务中的所有操作都使用内存优化表的相同事务一致快照。 内存优化表的所有事务隔离都基于快照的事务隔离。 例如,使用可序列化隔离级别来访问内存优化表的事务将对同一个事务一致快照执行所有操作。 访问内存优化表的事务使用此行版本控制来获取表中行的事务一致快照。 事务中由任何语句读取的数据是在该...
GO CREATE TABLE Destination1 ( --See the section on bucket_count for more details on setting the bucket count. col1 INT NOT NULL PRIMARY KEY NONCLUSTERED HASH WITH (BUCKET_COUNT = 1000000), col2 varchar(1000) NOT NULL, col3 varchar(1000) NOT NULL ...
If you have a workload that uses many memory-optimized table types in Microsoft SQL Server 2017 on Linux, you may experience excessive PREMPTIVE_OS_CREATEDIRECTORY waits during compilation or recompilation of ...
Symptoms Assume that you use in-memory online transaction processing (OLTP) in SQL Server 2017 on Linux. When you change a memory-optimized table by dropping large object (LOB) data or an off-row column, a memory leak might occur.