Performance Problems with iSeries Applications
description
Transcript of Performance Problems with iSeries Applications
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Interactive Response Time
69% - 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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Daily GANTT Chart -
Interactive
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CPU (seconds) by Subsystem
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Number of I/Os by
Subsystem
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Skipped Records by Job/User
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Skipped Records by File/Fields
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Long Running Batch Jobs
57% - CPU used less than 50%, but batch jobs take a long time & don’t use CPU efficiently. Have been told that a bigger system with more CPU is needed.
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Daily GANTT Chart – Long
Batch
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Temporary Disk Space Jumps
48% - Disk space jumps from 70 to 90%, could be from temp space used by jobs but have not been able to prove which job is doing it.
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Disk Navigator – Size of QTEMP by Job
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Long Nightly Processing
44% - Night processing runs long, one CL program calls 100s of other programs and it takes 6 hrs to run.
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Job Overview – One
Process
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Job Overview – Several Processes
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Application Analyzer – By Program
Function
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Application Analyzer – By
OS/400
Function
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Application Analyzer – Open/Close
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Java & JDBC Killing System
43% - 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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QUSRWRK CPU Seconds
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QUSRWRK Skipped Records
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Waiting for Pick Slips
43% - Overall CPU is only 30% used, yet users wait 6 minutes for pick slips to print. When batched, it takes 45 minutes to start printing, which delays product shipping.
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CPU 30% Used, Jobs in
Queue
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# of Jobs by Job and User
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Jobs Waiting in Job Queues
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Waiting 250 Minutes, Runs 1 Second
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Job Logs Wasting Resources
40% - 500,000 pages of job logs generated every day, logs rarely used, wasting disk space, CPU & I/O.
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# of Pages by Queue, Job &
User
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Job Description & End Code
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Message Logging
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Job Runs 30,000 Times
38% - Our batch job runs 30,000 times per day, consumes 1 CPU second each time it runs. Ends up being 30% of CPU consumed, constantly spikes system all day.
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CPU by Job Name
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# Jobs by Job Name
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HA Can’t Keep Up
30% - Journal receivers are 10 GB per day, HA can’t keep up.
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Journal Analyze
r
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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