Best Practices for Performance Part 2.NET and Oracle Database

Transcription

1 Best Practices for Performance Part 2.NET and Oracle Database Alex Keh Christian Shay Product Managers Server Technologies September 19, 2016

2 Program Agenda Caching SQL Tuning Advisor Oracle Performance Monitor Q+A 2

3 Caching ODP.NET 3

4 Desirable Cache Characteristics Fast performance Easy to use/setup Minimize runtime resource usage Scalable for both client and server Up to date, accurate results 4

5 Better Caching Solutions DB responsible for change notification DB server = the one source of truth Overcomes typical disadvantages Network traffic more throughput Only generates traffic if database change occurs Higher scalability Only updates if change occurs and data is read Timing greater accuracy As soon as change occurs, clients receive acknowledgement 5

6 Oracle.NET Caching Solutions Oracle.NET client-side DB caches Client Result Cache Continuous Query Notification (CQN) customizable cache TimesTen In-Memory Database Automatically updates/alerts client cache upon server changes Each meets separate caching requirements Server-side caches can be used with.net DB In-Memory option, server result cache, etc. 6

7 Oracle Client Result Cache Automatically updating query result set cache Benefits Easy to use No code changes required Snapshot consistent Cache refreshes without user intervention More scalability and performance Data retrieval from client, rather than server No additional round trips 7

8 Oracle Client Result Cache Updates 1. Upon data change, client receives change notification on subsequent round trip (or max lag) Invalidation notifications piggyback on existing client round trips No changes to the cache results yet 2. Cache waits for next read to refresh results No unnecessary DB traffic Defers update as late as possible Cache entries do not timeout Least Recent Used algorithm 8

9 D E M O N S T R A T I O N Client Result Cache

10 Client Result Cache How It Caches To use cache results, the following must match SQL text Bind values Session settings Different sessions with same user settings share cache results Must exist in same client process Different users do not share the same result sets One cache per machine per client process 10

11 Oracle Continuous Query Notification (CQN) More Control Over Cache Behavior Programmatic control over cache notifications and updates Also known as Database Change Notification Benefits over Client Result Cache More control over how cache behavior What if multiple DB users access the same results? What if only a subset of the cached data is required? How long should a query be cached? Do I want additional logic executed when the cache is refreshed? Requires significant customization CQN provides cache infrastructure 11

12 Data Change OracleCommand Notification Request Execute() TABLE Data Dictionary Add Dependency OnChange OracleDependency Application Listener Notification Queue

13 D E M O N S T R A T I O N CQN

14 When to Use These Caches Client Result Cache and CQN Good use cases Few and mostly read-only tables Few rows updated for each table Replace app logic that checks for updates to ensure user has most up to date data Bad use case Do not use it for constantly changing data 14

15 Oracle TimesTen In-Memory Database Memory-Optimized Relational Database Fully featured relational database Oracle compatible SQL and PL/SQL Persistent and durable Transactions with ACID properties Flexible options for durability Exceptional performance Instantaneous response time, high throughput, embeddable ODP.NET TimesTen provider for TimesTen DB Same ODP.NET APIs 15

16 Oracle Performance Analyzer and SQL Tuning Advisor Oracle Developer Tools for Visual Studio 16

17 SQL Tuning Advisor Included with Oracle Developer Tools for Visual Studio Use when designing new SQL statements Tune ad-hoc SQL statements in Query Window Tune bad SQL found by Oracle Performance Analyzer Use if SQL is performing poorly under load

18 SQL Tuning Advisor Requirements ADVISOR privilege Oracle Database license for Oracle Diagnostic Pack Oracle Database license for the Oracle Tuning Pack How to run: Oracle Query Window Tune SQL button Oracle Performance Monitor Tune SQL button

19 D E M O N S T R A T I O N SQL Tuning Advisor

20 Oracle Performance Analyzer Included with Oracle Developer Tools for Visual Studio Detects performance issues in an application s use of the database under load Requirements SYSDBA Oracle Database license for Oracle Diagnostic Pack Can be use during testing Can be also used on production applications

21 Oracle Performance Analyzer Simple to use Run your application Enter amount of time to analyze Press Start to start timer Sufficient database time required to get results View findings and actions Implement recommended actions Run Oracle Performance Analyzer again until no remaining issues

22 D E M O N S T R A T I O N Performance Analyzer

23 Additional Oracle.NET Resources OTN otn.oracle.com/dotnet Twitter twitter.com/oracledotnet YouTube youtube.com/oracledotnetteam and

24 Upcoming.NET Sessions Meet the Oracle Programming and Scripting Experts Tuesday 6:15 PM Moscone South Best Practices for Performance Part 2:.NET and Oracle Database Thursday- 10:45 AM Marriott Marquis - Salon 10/11 PL/SQL Programming for.net Developers: Tips, Tricks, and Debugging Thursday 12:00 PM Marriott Marquis - Salon 10/11 What s New for.net Developers in Oracle Database Thursday 1:15 PM Park Central Concordia Best Practices for High Availability:.NET and Oracle Database Thursday 2:30 PM Park Central Concordia

25 Q&A 25

26 Safe Harbor Statement The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle s products remains at the sole discretion of Oracle. 26

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