Download - How to Drive Down iSeries Computing Costs
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I/O Causing CPU, Memory, Disk Bottlenecks
90% of all system performance issues are caused by excessive, unnecessary I/O performed by application software!
• High CPU Utilization• Memory Faulting• Slow Interactive Response Time• Long Duration of Batch Jobs• High Disk Actuator Arm Activity
Application with SQL that Reads 1,000,000 Records to Select 1,000 Records
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Tune Application Workload Before Hardware Tuning
Don’t Tune Hardware First!
Enhance Efficiency of Applications…
Tune Hardware Around Appropriate Workload
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Identify Top Causes of
Bottlenecks
Identify Top Causes of Bottlenecks
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Understand Make-up of Workload
Understand Make-up of Workload
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Create List of Top Priorities
Create List of Top Priorities1. Interactive Threshold Being Exceeded2. Daytime SQL and Queries Impacting Response Time3. Nightly Processing Running for 5 Hours4. Payroll Job Running for 6 hours per Location5. AR Aging Report Killing System
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Interactive Response Time
63% - Interactive response time is usually OK, but random slowdowns occur. Can’t find cause – solution appears to be a $100,000 interactive feature card.
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Interactive SQL &
Queries #1
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Interactive SQL &
Queries #2
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Interactive SQL &
Queries #3
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Interactive SQL &
Queries #4
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HA Can’t Keep Up
51% - Journal receivers are 10 GB per day, HA can’t keep up.
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Journal Analyze
r #1
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Journal Analyze
r #2
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Journal Analyze
r #3
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Journal Analyze
r #4
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Java & JDBC Killing System
46% - New web app uses Java & JDBC, when web lookup pages are hit, user waits 2 minutes. System was fine until new app went live.
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QJVACMDSR
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Application
Analyzer
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Job Logs Wasting Resources
32% - 500,000 pages of job logs generated every day, logs rarely used, wasting disk space, CPU & I/O.
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Spool Analyzer #1
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Spool Analyzer #2
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Spool Analyzer #3
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Job Description &
End Code
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Message Logging
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Q&A
To receive MB Software’s FREE performance evaluation:
1. Register at http://www.mb-software.com 2. Download and install software on AS/400 3. Call (800) 713-5034 to schedule your free performance review session
What To Expect:
After allowing performance data to accumulate for one full business day, you will log into a secure area of MB Software’s Web site and have a conference call to discuss our findings and how you can gain performance improvements. It’s that easy!
Questions & Answers