Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Memory-optimized tables are created using CREATE TABLE (Transact-SQL). Memory-optimized tables are fully durable by default, and, like transactions on (traditional) disk-based tables, transactions on memory-optimized tables are ...
Besides the default durable memory-optimized tables, SQL Server also supports non-durable memory-optimized tables, which aren't logged and their data isn't persisted on disk. This means that transactions on these tables don't require any disk IO, but the data is lost if there is a serv...
In-Memory OLTP introduces memory-optimized tables and natively compiled stored procedures in SQL Server. This article gives an overview of query processing for both memory-optimized tables and natively compiled stored procedures.The document explains how queries on memory-optimize...
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...
Starting with SQL Server 2016 (13.x), there's no limit on the size of memory-optimized tables, though the tables do need to fit in memory. In SQL Server 2014 (12.x) the supported data size is 256 GB for SCHEMA_AND_DATA tables. The size of a memory-optimized table corresponds to ...
Learn how the query optimizer uses statistics about columns in memory-optimized tables to create query plans that improve query performance for In-Memory OLTP.
you can bind multiple databases to the same pool. SQL Server allows binding a database without memory-optimized tables to a resource pool but it has no effect. You may want to bind a database to a named resource pool if, in future, you may want to create memory-optimized tables in the...
SQL Server 2014 CTP1 introduced hash indexes for memory-optimized tables. Hash indexes are very efficient for point lookups, when you know exactly the value you are looking for. However, they do not perform well if you need a range of value, for example a da...
In SQL Server 2014 CTP1, memory optimized tables supports only non-clustered primary key and indexes. They support hash index. The option ‘bucket_count’ must be specified for index They won’t support identity column. They won’t support auto updating of statistics. statistics needs to be ...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Memory-optimized tables, natively compiled stored procedures, and user-defined functions do not support the full Transact-SQL surface area that is supported by disk-based tables, interpreted Transact-SQL stored procedures, and user...