Make your Virtualized SQL Servers Top Performers

Make Your Virtualized SQL Servers

Top Performers

#devconnections

MAKE YOUR VIRTUALIZED SQL SERVERS TOP PERFORMERS

About David Klee

#devconnections

@kleegeekdavidklee.netgplus.to/kleegeeklinked.com/a/davidaklee

Specialties / Focus Areas / Passions:

• Performance Tuning & Troubleshooting

• Virtualization• Infrastructure

• High Availability• Disaster Recovery• Capacity Management• Health & Efficiency


#devconnections

My SQL Servers run slower now that they are virtual.

Why?

What can I do about it?


Agenda• Inside the VM layer• Performance monitoring / collection• Bottleneck analysis up the system

stack• Shifting the bottlenecks

#devconnections


What is Virtualization?• Abstraction of hardware & OS• Resources & queues• Resources are finite• Queues can be measured

#devconnections


#devconnections

Infrastructure & VirtualizationBlack Box

Infrastructure & VirtualizationBlack Box

SQL Server Instance

DB DB DB App App


Inside the Black Box

#devconnections

CPU SchedulerCPU

ExecutionCPU Scheduling Queue

Memory SchedulerMem

R / WMem Scheduling Queue

Disk SchedulerDisk R / W

Disk Scheduling Queue

Network SchedulerNetwork Tran / Rec

Network Scheduling Queue

VM TASK

VM TASK

VM TASK

VM TASK

VM TASK


Shared Everything

Hard Limits• Cluster / host resources• Max VM size• CPU / mem count• Storage IOPs /

throughput• Path aggregate

throughput

Soft Limits• CPU queue contention• Memory oversubscription• Variable resource

consumption• Noisy neighbors

#devconnections


WHERE TO START?Understand where you are at today.

#devconnections


Baselines• Critical!• Benchmarks• Baselines• Statistics Collection

#devconnections


What To Collect• Environmental– Storage utilization

• Host– Aggregate resource

consumption– Path utilization

• Guest– Resource

consumption– CPU queue waits

• In-Guest– WMI Counters– SQL Server metrics

#devconnections


Collect & overlay everything• A single counter can lie to you

#devconnections


Bottleneck Analysis• Systems have bottlenecks• Determine contention points• Where to start?

#devconnections


System Stack

#devconnections

Net

wor

king

Net

wor

king

Inte

rcon

nect

sIn

terc

onne

cts

Physical ServerPhysical Server

VirtualizationVirtualization

Operating SystemOperating System

SQL Server InstanceSQL Server Instance

SQL Server DBSQL Server DB

ApplicationApplication

StorageStorage

You are here.


Waits Analysis• SQL Server waits• WMI / Perfmon stats• Virtual Machine layer• Host layer• Infrastructure layer

#devconnections


UP THE SYSTEM STACK

#devconnections


Storage

#devconnections

ControllerController

ControllerController

LUNLUN

LUNLUN

LUNLUN

LUNLUN

Disk PoolDisk PoolSANSANLUNLUN

LUNLUN


Storage• Single largest pain

point• Latency & IOPs• HBA Queue depth• Path bottlenecks• Multipathing

• Use less I/O• Improve disk

configuration• SSDs• Spread out

workload

#devconnections


#devconnections

SAN

DB

E:

FG1

FG2

DF4

DF3

DF2

DF1

G:

F:


Storage• Maximums– SQLIO– SQLIO Batch

bit.ly/1mEAS9W

• Overlaysteadystate (WMI)

#devconnections

http://bit.ly/1mEAS9W


Network• Network latency & throughput test• iperf - How-To Guide: tinyurl.com/ost9gll

#devconnections

http://tinyurl.com/ost9gll


VM Proximity• Network-heavy VMs on same host

#devconnections


Physical Machine• CPU / memory / uplinks• Queue times• Highest performing equipment• No memory overcommitment

#devconnections


Virtual Machine• Spread out the I/O• Resource prioritization• “Right-Sizing” analysis– Amount of vCPUs / memory– Analyze your current usage carefully– Balancing needs with physical constraints

#devconnections


Virtual Machine• vNUMA configuration matters

#devconnections

31% Difference!


SQL Server Instance• Reduce resource scheduling while

maximizing performance• Max Degree of Parallelism• Cost Threshold for Parallelism• Large pages

#devconnections


SQL Server Database• Spread out the I/O– File groups, data files, partitions

• Reduce I/O– Table / index compression– In-memory constructs–More RAM

#devconnections


Application• Query tuning• Data handling improvements• Take advantage of SQL Server features

#devconnections


Conclusions• Shift the Bottleneck• Workload “Right-Sizing”• Better Performance• Reduced Resource Consumption• Higher Consolidation

#devconnections


QUESTIONS?

#devconnections

davidklee.net @kleegeek


THANK YOU!

#devconnections

SESSION TITLE

#devconnections

Rate This Session Now!Rate with Mobile App:1. Select the session from the

Agenda or Speakers menus

2. Select the Actions tab

3. Click Rate Session

Rate Using Our Website:1. Register at www.devconnections.com/logintoratesession

2. Go to www.devconnections.com/ratesession

3. Select this session from the list and rate it

Tell Us What

You Thought

of This Session

Be Entered to

WINPrizes!

Make your Virtualized SQL Servers Top Performers

Data & Analytics

Transcript of Make your Virtualized SQL Servers Top Performers