In-Memory OLTP

Ahmad Yaseen

In-Memory OLTP Enhancements in SQL Server 2016

August 22, 2017 by

SQL Server In-Memory OLTP, also known as Hekaton when it was introduced in SQL Server 2014, provides us with the ability to move specific database tables and suitable stored procedures into memory and compile the stored procedures into native x86 code. As a result, you can easily query these database objects directly from memory with the best performance and the least possible data access latency. In addition to that, the SQL Server Engine will no longer use the old latching and locking mechanism to control the data access concurrency. Instead, a high performance row versioning mechanism will be used to control the concurrency. This optimistic concurrency mechanism is 5 times to 20 times faster than the normal disk-based processing, due to reading the data from the memory directly.

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Ahmad Yaseen

Using Memory-Optimized Tables to Replace SQL Server Temp Tables and Table Variables

January 24, 2017 by

TempDB usage can be considered as a performance bottleneck for workloads that use temp tables and table variables intensively resulted in heavy IO usage. A valuable alternatives for the temp table and table variable are SCHEMA_ONLY Memory-Optimized tables and the Memory-optimized Table Variable, where the data will be completely stored in the memory without the need to touch the TempDB database, providing the best data access performance. SCHEMA_ONLY Memory-Optimized table and the Memory-optimized Table Variable are stored only in the memory with no related component in the disk. It involves no IO activity or TempDB utilization. It can also participate in the transactions without the need to log the transactions.

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Luan Moreno M. Maciel

In-Memory OLTP Series – Data migration guideline process on SQL Server 2014

January 28, 2016 by

In this article we will review migration from disk-based tables to in-memory optimized tables. This article assumes that you already understand the pros and cons about In-Memory Technology, for more articles about this, please refer here.

There are some options available on SQL Server 2014 and SQL Server 2016 that will help you to identity, discover and track the tables and stored procedures that can be good candidates to be ported to memory. Furthermore it’s possible to check if the table meets to all the pre-requisites established. Here is the list of the features that we will take a look into.

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Murilo Miranda

In-Memory OLTP – Three key points to entertain your watchdog

February 4, 2015 by

With the introduction of the in-memory technology, we need to think about what are the new challenges to keep the service up and running. In this article I will explore one of the three key points to monitor in order to maintain your SQL Server healthy.

Last week I spoke at my local SQL Server user group, in Lisbon. The session was nice and the good feedback received encouraged me to write about this and share information that is not too spread over the internet (so far…): Monitor environments using In-Memory OLTP.

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Luan Moreno M. Maciel

In-Memory OLTP Series – Introduction

January 30, 2015 by

Introduced on SQL Server 2014, the new brand feature In-Memory OLTP a.k.a “Hekaton” is a Main-Memory Database Engine. Developed by Microsoft Research & Paul Larson (Database Research Group at MSFT) this feature have the ability to manage and held tables entirely In-Memory. In this Series we will pass through for all the new concepts and components that makes this New Engine the most excited acquisition of the new SQL Server Version (120).

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