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Jonathan Flowers
6 years ago
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3 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

4 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

5 Non Optimal Data Access Design Non Optimal Queries Intensive Workload Chatty Applications

6 Non Optimal Data Access Design Non Optimal Queries Intensive Workload Chatty Applications

7 Intensive Workload Non Optimal Queries Size matters! so does monitoring it

8 Intensive Workload Non Optimal Queries Scale Up / Down Tune Performance Scale Out Monitor Resource Usage Choose Service Tier Choose Perf Level Create/Add

9 Intensive Workload Non Optimal Queries Scale Up / Down Tune Performance Monitor Resource Usage Choose Service Tier Choose Perf Level Create/Add

10 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

11 Customer type Start-ups Enterprise SaaS CSV Optimal SKU Basic & Standard Premium Elastic Database Pool Application pattern Smaller workload, low concurrent users Larger workloads & concurrent users 1 CSV customer = 1 DB small-> large workloads Resource Governance Dedicated Resources per DB Dedicated Resources per DB Shared Resources across a set of DBs Main customer requirements Price, Predictable Performance, basic business continuity needs Predictable Performance, higher business continuity needs Managing Scale, Flexible & Predictable biz model, cost efficiency

13 Data IO Bounding Box CPU Monitoring % of current Performance Level Utilization = 75% DTU DB workload Log IO 75% 50% 50% 60% Memory DataIO LogIO CPU Memory

15 Home/Calculate

16 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

20 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

21 Elastic database pool provides large scale SaaS CSVs a simple cost effective solution to achieve performance goals for a group of databases with widely varying and unpredictable usage patterns. DTU DTU of pool DTU utilization of pool DB DTU max per database DB DB DTU utilization of database DTU min per database

22 Relationship of servers and pools A pool is contained by a single server. A server can contain multiple pools. Azure region Setting performance goals is friction free Create new database in a pool Add/Move databases from a pool Resize a pool or its per database settings Changing performance settings is online Portal, T-SQL, REST and Powershell APIs Create new Add existing DB DB Logical server Elastic pool 1 Elastic pool 2 Move between DB DB DB Move out DB

24 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

33 Analyze Create DB Resource Usage Pick Validated Indexes Remove Display Indexes Monitor Negative Impact Indexes Recommendations Indexes

34 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

35 Web site is down Temporary perf. issues DB upgraded Database is not working Impossible to predict / root cause Regression caused by new bits

37 Enable Query Store (ALTER DB) Let Query Store collect the data Search for problematic queries Set FORCE PLAN policies Use of T-sql to enable query store ALTER DATABASE AdventureWorks SET QUERY_STORE = ON; Stored procedures plan forcing and other operations EXEC = = 49; MSDN documentation

38 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

39 Get DTU consumption by top consuming queries Get Query Metrics Get Query Text

40 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

41 Create XE session Set up Events & Target Start & Collect Data Parse Output Analyze

43 sing-extended-events-onazure-sql-database.html

44 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

46 Session Related DMVs DMV Scenario sys.dm_exec_connections Active connections to the database Transaction Related DMVs DMV Scenario sys.dm_tran_active_transactions Active user transactions to the database sys.dm_exec_sessions Active sessions to the database sys.dm_tran_database_transactions Active transactions in the database sys.dm_exec_requests Active requests to the database sys.dm_tran_session_transactions Active transactions in the session Execution Related DMVs DMV sys.dm_db_missing_index_details sys.dm_db_missing_index_columns sys.dm_db_missing_index_groups sys.dm_db_missing_index_group_stats sys.dm_db_index_usage_stats sys.dm_db_index_physical_stats sys.dm_db_index_operational_stats sys.dm_exec_procedure_stats sys.dm_exec_trigger_stats sys.dm_exec_query_memory_grants sys.dm_exec_cached_plans sys.dm_db_partition_stats sys.dm_db_wait_stats sys.dm_tran_locks Scenario Missing indexes that would increase the query performance. Missing table columns for a given index. Missing indexes are contained in a specific missing index group, excluding spatial indexes. Groups of missing indexes, excluding spatial indexes. Information about the usage of an index. Information about the physical layout for a given index (space consumption etc). Information about the performance for a given index. Usage of stored procedures in the database. Usage of triggers in the database. Queries waiting for memory before they can be executed. Execution plans that are currently in the case. Information about the storage of tables/indexes Waits in the database (new DMV specific to SQL Database) Active locks in the database

48 3 rd Party Tool (Beta to be announced late Jan 2016) Azure SQL Dashboard Top SQL Event Manager Calendar

49 Common Causes of Performance Issues Know your DTUs Throw All The Hardware At It vs Fix The Code

Designing Modern Apps Using New Capabilities in Microsoft Azure SQL Database. Bill Gibson, Principal Program Manager, SQL Database

Designing Modern Apps Using New Capabilities in Microsoft Azure SQL Database Bill Gibson, Principal Program Manager, SQL Database Topics Case for Change Performance Business Continuity Case for Change