1. The 5 Hidden Performance Gems
of SQL Server 2014
Boris Hristov
SQL Server MVP, Speaker, Trainer, Blogger and DBA

2. Gold sponsors
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4. That’s not a Hekaton Talk!

5. So who am I?
So who am I?
@BorisHristov

6. things that can make your life better5
things that can make your life better

7. Here’s how this will go…
We’re here
time

8. 1
Delayed Durability

9. A
Atomic C
Consistent I
Isolated D
Durable

10. Transaction’s lifecycle
Buffer Cache
Modification is recorded
in transaction log on disk 3
Data pages are located in, or read into, the buffer cache
and then modified 2
Later, checkpoint writes dirty pages to database 4

11. Here’s the reason why it’s slow

12. Transaction’s lifecycle
Buffer Cache
Modification is recorded
in transaction log on disk 3
Data pages are located in, or read into, the buffer cache
and then modified 2
Wouldn’t it be interesting if…
60 KB buffer -> flush
Sp_flush_log
Durable transaction – MSDTC or Cross database
Later, checkpoint writes dirty pages to database 4

13. Yes,
you can lose data!

14. DEMO
Delayed Durability

15. 2
SELECT INTO

16. Why don’t we speed up a bit?
Prior SQL Server 2014: Serial Execution Plans
SQL Server 2014: Parallel Execution Plans

17. You want that speed, right?
Talk with the DBAs to design a proper disk and data layout!

18. DEMO
SELECT INTO

19. Cardinality Estimator3
Cardinality Estimator

20. Why is the CE so important?

21. The CE has not been changed since SQL Server 7.0
…and at the same time
The CE has not been changed since SQL Server 7.0

22. Where to expect changes?
Queries with Multiple Predicates
Queries Joining Multiple Tables
New Data Not Presented in the Stats
Almost everywhere… (this, oh btw, means you have to test a lot!)

23. Cardinality Estimator
DEMO
Cardinality Estimator

24. Inline Index Definitions (remember this one for later)4
Inline Index Definitions (remember this one for later)

25. Remember this improvement
SQL Server 2012
SQL Server 2014

26. Inline Index Definitions
DEMO
Inline Index Definitions

27. Partitioning Improvements5
Partitioning Improvements

28. Why is partitioning both cool and not?
Numbers …
8000
Partition 1 …
2500
Partition 2
2501 …
4000
Partition 3
4001 …
8000

29. Partitioning Improvements
DEMO
Partitioning Improvements

30. Temporary Objects Caching+1
Temporary Objects Caching

31. In summary Testing is important! Delayed Durability
Parallel SELECT INTO
Cardinality Estimator
Inline Index Creation
Partitioning Improvements
Testing is important!

32. Resources you can use
Just a click away!

33. Thank you! Contacts: brshristov@live.com @BorisHristov