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SQL Server 2014:Ready. Steady. GO!
Boris HristovSoftUni Conf 2015, 22.03.2015
So who am I?
@BorisHristov
3ways to dramatically speed your app
time
coo
lnse
sSession’s Timeline
1Delayed Durability
Durability
A
C
I
D
Atomicity
Isolation
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
Later, checkpoint writes
dirty pages to database
Buffer Cache
4
3
Here’s the reason why it’s slow
Buffer Cache
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 disk3
Later, checkpoint writes
dirty pages to database4
Yes, you can lose data!
DEMO Delayed Durability
2Table Partitioning?
Numbers
0
…
10 b.
Partition 2
1 b.
…
3 b.
Partition 1
0
…
1 b.
Partition 3
3 b.
…
10 b.
So what’s partitioning all about?
Numbers
0
…
8000
Partition 2
2501
…
4000
Partition 1
0
…
2500
Partition 3
4001
…
8000
Why is partitioning cool and not cool?When availability matters
(online partition-level maintenance)
Numbers
0
…
10 b.
Partition 2
1 b.
…
3 b.
Partition 1
0
…
1 b.
Partition 3
3 b.
…
10 b.
When query performance matters(incremental statistics update)
DEMO Table Partitioning Improvements
3Hekaton(In-Memory OLTP)
Somewhere in Redmond…(there was a monologue happening)
- OK, so SQL server is nowadays delivering incredible performance
- Can we, however, make it even faster?
- Can we make it… really fast?
- …
- Like… blazingly fast?
- …
- Mind-blowingly fast…
Credits: Top Gear
It turned out, they can.
DEMO Hekaton (In-Memory OLTP)
time
coo
lness
Session’s Timeline
DEMO Hekaton (In-Memory OLTP)
The Limitations
No foreign keys
No ALTER TABLE is allowed
No Constraints
No indexes after the table is created…
Just to name a few…
vNext
So you want even more performance?
Delayed Durability
Table Partitioning
Hekaton
Who said testing is important?
