In this article, we will learn latch contention issues that we might experience in the SQL Server TempDB database. We will also discuss reasons and the solution method of these latch contention issues. Especially, we will mention the Memory-Optimized TempDB Metadata feature that was introduced with the SQL Server 2019.Read more »
This article will cover the usage details and performance advantages of the memory-optimized table variables.Read more »
Table-Valued Parameters aka TVPs are commonly used to pass a table as a parameter into stored procedures or functions. They are helpful in a way, we can use a table as an input to these routines and we can get rid of dealing more complex steps to achieve this process.Read more »
This is in continuation of the previous articles How to monitor internal data structures of SQL Server In-Memory database objects and SQL Server In-Memory database internal memory structure monitoring.Read more »
This is the continuation of the previous article SQL Server In-Memory database internal memory structure monitoring. In this article we are going to dissect the details of other components that are available to validate the SQL Server In-Memory objects.Read more »
We can use a variety of available options to keep systems performing at their very best. The SQL Server In-Memory OLTP technological advancement is a great innovation to relieve tempdb contentions. This feature is available with an additional advantage to monitor systems without incurring stress on the database servers.Read more »
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.Read more »
Microsoft SQL Server 2014 is considered to be the first version that supports Hybrid Cloud by adding a lot of exciting new features.
In this article, I will cover some of the top new features in these main points including Hekaton and Hybrid Cloud enhancements:Read more »
TempDB usage can be considered as a performance bottleneck for workloads that use SQL temp tables and table variables intensively resulted in heavy IO usage. A valuable alternatives for the SQL 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.Read more »
With the introduction of Microsoft’s new In-Memory OLTP engine* (code name Hekaton) a new type of nonclustered index was introduced to help you search the in-memory tables based on a range of values. Although the name is similar it does differ from the one we have in the traditional disk tables.Read more »
With the introduction of Microsoft’s new In-Memory OLTP engine (code name Hekaton) the familiar B-Tree indexes were not always the optimal solution. The target of the Hekaton project was to achieve 100 (hundred) times faster OLTP processing, and to help this a new index was introduced – the hash index.Read more »
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.Read more »
Here we are with the last part of this series of articles! In this article we are going to see two curiosities:
- How does in-memory OLTP work with Availability Group?
- Can I migrate from Log Shipping or Database Mirroring to Availability Groups?
So, let’s start!Read more »
In-memory OLTP is a revolutionary tool introduced on SQL Server 2014. On SQL Server 2016 this will be even better, with a broader surface of supported tools. Check this article to know the news.Read more »
When creating a hash index in a memory optimized table we need to define a value for the bucket count. Think twice before set a random value, you may pay the price later… On this article we will explain the effects of a bad defined bucket count and how to monitor it.Read more »
In sequence of the first article about the server memory importance, we will check another In-Memory OLTP key point: The Checkpoint files. Check what wrong can happen, and how to avoid this!Read more »
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.Read more »
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).Read more »
In continuation of the previous post “Buffer Pool Extension (BPE) – Introduction to the Buffer Pool”, we will keep diving into the Buffer Pool Extension, this time, talking about another important factor behind this feature – the memory. No, we will not review how the memory works literally, we are talking about the great SQL Server 2014 new feature: The In-Memory OLTP, or the known HEKATON.Read more »