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No Silver Bullets - OBIEE Performance in the Real World (Rittman Mead BI Forum 2014)
 

No Silver Bullets - OBIEE Performance in the Real World (Rittman Mead BI Forum 2014)

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Are you involved in the design and development of OBIEE systems and want to know the best way to go about ensuring good performance? Maybe you've an existing OBIEE system with performance "challenges" ...

Are you involved in the design and development of OBIEE systems and want to know the best way to go about ensuring good performance? Maybe you've an existing OBIEE system with performance "challenges" that you need to diagnose?
This presentation looks at the practical elements of diagnosing the causes of performance issues in OBIEE, and discusses good practices to observe when developing new systems.

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    No Silver Bullets - OBIEE Performance in the Real World (Rittman Mead BI Forum 2014) No Silver Bullets - OBIEE Performance in the Real World (Rittman Mead BI Forum 2014) Presentation Transcript

    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com No Silver Bullets : OBIEE Performance in the Real World
 Robin Moffatt, Principal Consultant May 2014
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com OBIEE Performance in the Real World •Do It Right, First Time ‣What Makes A Performant OBIEE System? ! •If It’s Not Done Right, Know How To Figure Out What Is Broke ‣Practical elements of diagnosing the causes of performance issues ‣Methodical analysis - “nose to tail”
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com The Requirement
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com The Problem •Lots of moving parts and complexity •Overall solution crosses disciplines and job roles ‣OBIEE developer ‣Database developer ‣DBA ‣Server Admin ‣Network ‣SAN ‣LDAP ‣etc
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com The Additional Problem
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Performance Beyond the “Best Practices” •Tear down the reliance on “Best Practice”, but with a viable, better, alternative instead.
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com The Only Answer EVIDENCE-BASED 
 DESIGN AND DIAGNOSTICS
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Time Profile •To understand why is it slow, we first must understand where is it slow ! •Approach championed by Cary Millsap / Method-R •“Thinking Clearly About Performance” (2010) Performance improvement is proportional to how much a program uses the thing you improved. — Amdahl’s Law

    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com “Nose to Tail” Diagnostics Request Response BI Server BI Server Presentation Services Managed Server Managed Server JavaHost Presentation Services Web Browser Web Browser BI Plug-in BI Plug-in DWH [ ... ] [ ... ] DWH [ ... ] [ ... ] User WebLogic Server OBIEE system components Data Source(s) Network Network Not all components listed, eg cluster controller
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Time Profile in Action •End-user reports a response time of 40 seconds. •How can we make it faster? 
 ‣Where did the time get spent? Response BI Server Managed Server Presentation Services Web Browser BI Plug-in User WebLogic Server OBIEE system components DB Query 1 25 seconds DB Query 2 5 seconds Data Processing 10 secondsPage Generation 5 seconds DWH Data Source(s) DWH Time,seconds Component
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Time Profile in Action Step Action Response Time (s) % 1 Physical SQL 1 execute on DB 25.00 62.5 2 Physical SQL 2 execute on DB [5.00] — 3 BI Server does work on DB results 10.00 25.0 4 Presentation Services generates page 5.00 12.5 Total 40.00 100.0 DB Query 1 DB Query 2 Data Processing Page Generation Time profile shows clearly : 1.Improve performance of Query 1 2.Push work into single query
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Deep Dive into BI Server Time from nqquery.log Elapsed Response Physical Physical Query x Physical Query 1 BI Server processing (federation, calculation, aggregation) Send to client, wait for acknowledgement ! Eg. Presentation Services generating pivot tables, table scrolling/paging, etc. Compilation DBConnect Logical Query Summary Stats: [...] Compilation time c (seconds) Physical query response time p1 (seconds) Physical query response time px (seconds) Logical Query Summary Stats: Elapsed time e Logical Query Summary Stats: [...] Response time r Physical Query Summary Stats: [...] DB-connect time d (seconds) r - d - c - max(p) e - r •http://ritt.md/nqquery
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Usage Tracking’s blind spot •Usage Tracking is good, but it omits the Total Elapsed Time ! ! ! ! ! ! ! •This can hide problems: ! ! •Usage Tracking is great, but do be aware of this potential limitation to your visibility of where time has gone. Elapsed Response Send to client, wait for acknowledgement nqquery.log: Logical Query Summary Stats: [...] Response time r Usage Tracking: S_NQ_ACCT.TOTAL_TIME_SEC nqquery.log: Logical Query Summary Stats: Elapsed time e Usage Tracking: [Not Available] uh oh!
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Request Response Iterative Approach •Be sure to account for all time, end-to-end (nose to tail) •Expand time profile to focus on where the time is going in particular •In reality, time profile based on BI Server alone will help in a lot of cases BI Server Managed Server Presentation Services Web Browser BI Plug-in User WebLogic Server OBIEE system components DWH Data Source(s) DWH Network Network nqquery.logsawlog.log EM Active Reports, V$SQL, etcBrowser tools WLS logs
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Digging Deeper with DMS Metrics •OBIEE supports Fusion Middleware’s Dynamic Monitoring System (DMS) ! •Once we have found WHERE the time has gone, DMS metrics are one way to help us find out WHY ! •Hundreds of low-level metrics, ranging from the obvious 
 (BI Server Total Sessions) 
 to the less obvious (Peak_DXEParameterizedImpl_Count)
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Accessing DMS Metrics •DMS Spy •opmn •EM FMC •EM12c •obi-metrics-agent 
 + graphite 
 + grafana http://ritt.md/oma-intro
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Grafa-what? OBIEE DMS OPMN OS obi-metrics-agent collectl Graphite carbon whisper graphite Grafana •http://ritt.md/oma-intro •http://ritt.md/obiee-grafananqquery.log extract.sh
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com DMS Case Study •Query is running slowly, but it’s not clear why
 
 
 
 
 
 
 •CPU is only at 50% utilisation •Only a handful of rows returned from the DB
 
 •What is the BI Server up to for this time? Step nqquery.log source Time % Logical Query Elapsed e Logical Query Summary Stats: Elapsed time 16 Logical Query Response r Logical Query Summary Stats: [...] Response time 15 Logical Query Compilation c Logical Query Summary Stats: [...] Compilation time 0 0% Database connection d Physical Query Summary Stats: [...] DB-connect time 0 0% Physical Query 1 response p1 Physical query response time 4 25% BI Server processing r-d-c-max(p) [derived] 11 69% Send to client, wait for cursor close e-r [derived] 1 6% […][sessionid: d1d70000] [username: weblogic] -------------------- Rows 42, bytes 6914 retrieved from database query id: <<2779818>> [[[…]
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Demo! •The test driven by nqcmd - therefore just BI Server, no Presentation Services export SA_NQCMD_ADVANCED=Yes nqcmd […] -q -T -o $(date +%Y-%m-%d-%H%M%S) -t 20 -ds 1 -td 30 -i 20 -w 5 Ramp up to 20 threads Run at full-whack for 30 seconds Launch a new thread every 20 seconds Each thread runs a query every 5 seconds “Open Sesame” http://ritt.md/nqcmd-load-testing
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com DMS Provides the Proof •The Connection Pool has a fixed Capacity •Connections will start to Queue once Capacity is reached Physical connections limit is reached for connection pool "Star_orcl_Connection Pool 01". Start delaying the queries
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Responsetime Number of concurrent users •Performance: Response time is slow for one user •Capacity: Response time degrades as user concurrency increases •Whilst Performance improvements can alleviate Capacity problems, 
 adding Capacity alone will generally not fix your Performance problems Is your problem Performance or Capacity?BadGood
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Performance Diagnostics Approach •Performance ‣Build a time profile ‣Don’t know where to start? Try Usage Tracking or nqquery.log -Long running queries -Logical queries returning lots of data to the client -Logical queries returning lots of data from the DB but small % to the client -Logical queries requiring lots of physical queries ! •Capacity ‣Examine capacity metrics (OS, DMS) over time ‣Correlate with reported problems Queuing DMS metrics: Oracle BI DB Connection Pool/* -> Current Queued Requests Oracle BI PS Chart Engine -> Current Charts Queued Oracle BI PS Query Cache -> Current Queued Queries Oracle BI PS Thread Pools/* -> Current Jobs Queued Oracle BI Thread Pool/* -> Current Queued Requests
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com So What Does “Good” Look Like?
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com This Is Not “Best Practice” •There is no one right way : It Depends •c.f. •ExtremeBI •Exalytics The only “best practice” you should be using all the time is “Use Your Brain”. — Steven Robbins / Tom Kyte
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com The Bucket List of Performance Gains ★ Don’t Do It ★ Do It Only Once ★ Do It Less Often ★ Do It More Efficiently (h/t Greg Rahn)
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com ‘Database Pushdown’ (Do It More Efficiently) •Reduce the amount of work/data handled further up the stack •Federation across sources can be a challenge ‣c.f. BI Server caching BI Server Managed Server Presentation ServicesWeb Browser BI Plug-in DWH [ ... ] User WebLogic Server OBIEE system components Data Source(s) Network Network
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Feeding the Excel Monster (Do It More Efficiently / Don’t Do it) •What’s being done with the data once it’s in Excel? ‣Could it be done in OBIEE instead? ! •Alternatives to Export from Analysis/Dashboard: ‣Oracle have specific recommendations (DocID 1558070.1 p.13) -Favour CSV export over Excel -Favour BI Publisher export over OBIEE Analysis Export ‣Use Logical SQL against BI Server’s ODBC/JDBC interface directly ‣Dump direct from the database
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Don’t Do It / Do It Less Often •“Filter Early” •Table Prompt != Filter
 •Report by Exception ! •Make sure Dashboards have 
 default/mandatory prompts
 (http://ritt.md/obi-prompts) Yes, please do…. •Be smart about Dashboard and Analysis design - don’t cram everything into one page •Less clutter : Better user experience & Better performance
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com Not forgetting … •Do It More Efficiently ‣Aggregation
 •Do It Less Often ‣BI Server caching ! •Database optimisation (partitioning, indexing, parallelism, statistics, etc)
 •Balanced Hardware configuration
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com OBIEE Performance in the Real World •Do It Right, First Time ! •Methodical analysis - “nose to tail” EVIDENCE-BASED 
 DESIGN AND DIAGNOSTICS
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com #EOF ✴ email: robin.moffatt@rittmanmead.com ✴ web: http://www.rittmanmead.com/author/robin-moffatt/ ✴ twitter: @rmoff
    • T : +44 (0) 1273 911 268 (UK) or (888) 631-1410 (USA) or 
 +61 3 9596 7186 (Australia & New Zealand) or +91 997 256 7970 (India) E : info@rittmanmead.com W : www.rittmanmead.com References & Further Reading •Cary Millsap - “Thinking Clearly About Performance” ‣http://queue.acm.org/detail.cfm?id=1854041
 •Blog series: OBIEE and Performance ‣http://ritt.md/obiee-performance
 •obi-metrics-agent ‣http://ritt.md/oma-intro
 •Greg Rahn - “The Core Performance Fundamentals Of Oracle Data Warehousing – Balanced Hardware Configuration” ‣http://wp.me/p3cJT-by
 •Oracle documentation - “Oracle® Database 2 Day + Data Warehousing Guide - Balanced Hardware Configuration” ‣E25555-03