Sofia Event Center

14-15 May 2014

Boris Hristov SQL Server MVP, Speaker, Trainer, Blogger and DBA

Top 5 T-SQL Improvements in SQL Server 2014

That’s not a Hekaton Talk!

So who am I?

@BorisHristov SQL

5 That’s a talk for….

things that can make your life better

Here’s how this will go…

time

We’re here

1 Delayed Durability

ACID

Atomicity

Isolation

Each and every transaction is…

Consistency

Durability

Transaction’s lifecycle

Data pages are located in, or read into, the buffer cache and then modified

2

Modification is recorded in transaction log on disk 3

Later, checkpoint writes dirty pages to database 4

Buffer Cache

Here’s the reason why it’s slow

Transaction’s lifecycle

Data pages are located in, or read into, the buffer cache and then modified

2

Modification is recorded in transaction log on disk 3

Later, checkpoint writes dirty pages to database 4

Buffer Cache

Yes, you can lose data!

DEMO Delayed Durability

2 SELECT INTO

Why don’t we speed up a bit?

Prior SQL Server 2014: Serial Execution Plans

SQL Server 2014: Parallel Execution Plans

Talk with the DBAs to design a proper disk and data layout!

You want that speed, right?

DEMO SELECT INTO

3 Cardinality Estimator

Why is the CE so important?

…and at the same time

The CE has not been changed since SQL Server 7.0

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!)

DEMO Cardinality Estimator

4 Inline Index Definitions

(remember this one for later)

Remember this improvement

SQL Server 2012

SQL Server 2014

DEMO Inline Index Definitions

5 Partitioning Improvements

Numbers

0  

…  

8000  

Par**on  2 2501  

…  

4000  

Par**on  1 0  

…  

2500  

Par**on  3 4001  

…  

8000  

Why is partitioning cool and not cool?

DEMO Partitioning Improvements

+1 Temporary Objects Caching

In summary

Delayed Durability

Parallel SELECT INTO

Cardinality Estimator

Inline Index Creation

Partitioning Improvements

Who said testing is important?

Resources you can use

Just a click away!

Thanks!

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and for the overall conference experience at

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