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Flying Through the Clouds Performance Tuning in Azure Joey D’Antoni 26 September 2015 Modernizing The Data Platform 27-29 August 2015. NIMHANS Convention Centre, Bangalore, India. Joey D’Antoni • Joey has over 15 years of experience with a wide variety of data platforms, in both Fortune 50 companies as well as smaller organizations • He is a frequent speaker on database administration, big data, and career management • Principal Consultant, Denny Cherry and Associates • MSCE, Business Intelligence, Database Administration • He wants you to make sure you can restore your data Joeydantoni.com Thanks to our platinum sponsors : 3 | PASS SQL Saturday – Holland - 2015 Thanks to our silver and gold sponsors : 4 | PASS SQL Saturday – Holland - 2015 Agenda Performance Tuning Saves Money Understanding SQL Database Performance IaaS Performance Storage and Networking Welcome to SQL DB One of the earliest Azure offerings (SQL Azure) Originally a subset of both T-SQL language and SQL engine Now nearly code complete with SQL Server Some features are ahead of current release (SQL 2014) Benefits of SQL DB Ease of deployment Simplicity of management Scale up and scale out options Flexibility How I TUNE a SERVER MY METHODOLOGY Check Server Configuration Tune Queries Look in Plan Cache Read Error Log Look at Wait Stats 8 Performance Bottlenecks I STOLE THIS FROM TOM CPU Disk Memory Network Blocking/Locking © 2015 SOLARWINDS WORLDWIDE, 9 Cost Model Not CALs, No Cores, No License Fees Server / Database Bandwidth Data Out - Data in is FREE! 11 SQL Database DTUs Database Throughput Unit (DTUs) • Measurement of relative performance • Blended measure of CPU, memory and Ios. • DTUs are orders of magnitude Azure SQL Database Benchmark SQL Database Service Tiers and Performance Levels Basic Standard • S1—934 Transactions Per Minute • S2—2750 Transactions Per Minute • S3—5100 Transactions Per Minute Premium • P1—105 Transactions Per Second • P2—228 Transactions Per Second • P3—735 Transactions Per Second New Performance Options So What Does This Cost? Azure SQL DB Management Management features have been limited Past--No way to gather query execution plans Some for security through obscurity Slowly adding Dynamic Management Views Extended Events DMVs Expose metadata about system performance and operations A subset of what is available in SQL Server Most missing views are related to OS and server management Extended Events Replacement for SQL Profiler Not completely rolled out yet Collect execution plans from Azure SQL DB Challenges With Azure DB I/O Performance Space Management Multi-tenant scenarios Bandwidth I/O Performance and Space Management Optimize Data Types Use Compression Aggressively On Premium Tier consider using clustered columnstore Bandwidth Minimize result sets—perform aggregations in database Keep application services close to data Consider caching reports Try to eliminate ad-hoc reporting Other Keys to Performance Consider application tier caching Query Batching Functional Partitioning Choosing an Initial Service Level Choose the lowest level to start Monitor performance carefully Resizing is online operation Monitoring Performance Understand Peak CPU, Memory, IO Concurrency Need for low latency Resource Use Sys.resource_stats Aggregated every 5 minutes MSDN Performance Guide Tuning Your Application Reduce the “chattyness” of your applications Very intensive monolithic workloads Nonoptimized queries Databases with concurrency issues Elastic Database Pools Define the pricing tier and databases to include Pool dynamically adjusts resources to peak DTUs Azure Infrastructure as a Service Azure is really cool, really big VM farm It should mostly be treated and tuned as such Most performance problems are IO related Understand your workload and have good baselines Network Bandwidth The bandwidth to your storage depends on the size of your VM The bigger your VM, the more bandwidth you have This ties to storage—only DS machines are eligible for premium storage. Use Regional VNets to colocate app and DB tier Disk Considerations for Performance Multiple Disk Devices—each disk device can do 62.5 IOPS (64k) Premium Storage—a necessity for a busy server • Starts with 400 IOPs (64k) • Can go up to 6250 IOPs (64k) Don’t use caching Use D: (which is always temporary SSD) for TempDB space Storage Spaces You can use storage spaces to stripe across volumes to get IOPs Stripe Size 64k for OLTP and 256k for OLAP workloads Try to avoid auto-growth events http://bit.ly/AzureSQLPerf Summary Use the tools and metadata MS provide to help optimize your solutions Cloud architecture is different—think about ways to minimize I/O and network chattiness VMs do offer good performance—but at a cost Please review the event and sessions http://www.sqlsaturday.com/434/eventeval.aspx http://www.sqlsaturday.com/434/sessions/sessionevaluation.aspx 35 | PASS SQL Saturday – Holland - 2015 Thank you for your time! Modernizing The Data Platform Connect us with us: @SQLServerGeeks facebook.com/SQLServerGeeks facebook.com/groups/theSQLGeeks www.SQLServerGeeks.com [email protected]