1. In-Memory OLTP (IMOLTP) What Can It Do For Me?
Martin Catherall
Regional Mentor (APAC)
MVP – Data Platform

2. Martin Catherall Senior Consultant RockSolid SQL UXC Eclipse
MVP – Microsoft Data Platform
PASS Regional Mentor APAC
Give overview and introduction on this slide.

3. In-Memory OLTP – What Can It Do For Me.
Introduction

4. SQL Server Change Compression (Row or Page) Extended Events (2008)
Transparent Data Encryption (2008)
AlwaysOn (2012)
Columnstore (2012)
In-Memory (2014)
Discussion about change, adoption of new feature, agile development within SQL Server.
Not mentioned 2016 features.
New features have not only brought new terminology for new features but new terminology for old features.

5. IMOLTP - History Brought out SQL Server 2014 Enhanced SQL Server 2016
Reasonable use cases (many limitations)
Enhanced SQL Server 2016
Less limitations
Increased functionality
Available in Azure SQL Database
Not much changed needed (in a lot of cases)
Discussion about change, adoption of new feature, agile development within SQL Server.
Not mentioned 2016 features.
New features have not only brought new terminology for new features but new terminology for old features.

6. Some Thoughts SQL Server Thrives with Memory
As much as possible.
But my database already fits into memory.
Yes – but that’s still ‘disk based’
Pay attention to your data growth.
This will dictate your (growing) memory requirements.
We’ll still need memory for
Normal SQL Server
The Operating System.

7. Some (More) Thoughts Low Latency (nanoseconds v milliseconds)
High Concurrency (Pessimistic / Optimistic)
New concurrency model.
Multi Version Concurrency Control (MVCC)
Low Contention.
Durability (The “D” in ACID)
Can use to solve existing problems.
Although not all (Test! Test! Test!)

8. In-Memory OLTP – What Can It Do For Me.
Enabling in-memory

9. How to enable In-Memory
Enabled at the database level.
Simply Add a new filegroup
Use familiar syntax. (ALTER DATABASE)
Add an In-Memory Container.
This is a folder on the file system.
Use familiar syntax (ALTER DATABASE)

10. The IMOLTP filegroup Basically a directory on the file system.
Which might get used!
Only one IMOLTP filegroup allowed.
Need for durability.
So can data can be ‘recreated’ at startup.
High Availability.
Logging is slightly different
The Checkpoint Worker thread.

11. Enabling In-Memory for the database.
Demonstration
Enabling In-Memory for the database.

12. Multi-Version Concurrency Control MVCC
In-Memory OLTP – What Can It Do For Me.
Multi-Version Concurrency Control MVCC

13. MVCC – A New Concurrency Model
Data is immutable.
Insert only.
Isolation Modes
SNAPSHOT – the default
Read Committed
Serializable.

14. MVCC – Records Append ONLY In flight Record Committed Record
Begin TimeStamp
Transaction ID
Begin TimeStamp
End TimeStamp

15. In-Memory OLTP – What Can It Do For Me.
Creating Tables

16. Creating Tables Much the same as “Disk Based Tables”
There are limitations.
These are reducing
Durable or Non-Durable
Migration. (memory optimization Advisor)

17. Memory Optimization Advisor
Demonstration
Memory Optimization Advisor

18. Natively Compiled Objects
Slight Different Syntax
But very similar.

19. Accessing data In-Memory OLTP – What Can It Do For Me.
TSQL or Natively Compiled Stored Procedures?

20. Converting Code Converting Code can be Challenging!
Subquery support in SELECT statements in SQL2016
Unfortunately, not yet in update/delete.
CASE – would be great to see
For example workarounds see.
Feel free to share any of yours 
See also

21. In-Memory OLTP – What Can It Do For Me.
Monitoring in-memory

22. Temp table replacement
In-Memory OLTP – What Can It Do For Me.
Temp table replacement

23. In-Memory OLTP – What Can It Do For Me.
Backup AND Restore

24. Resources. http://bit.ly/1bSsY7o (Bob Beauchemin)
(Cheap Ram Changes)
(Bob Beauchemin)
(SQL Team )
(unsupported constructs - MSDN)
(Migration - MSDN)
(Temp Object Replacement)
(2016 White paper – download)
(free ebook (2014) - download)

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26. QUESTIONS

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