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 Featured Topic:  Performance tuning
Last Updated: Jan 05, 2005 
Looking to rev up your disk performance or tune your system? It isn't always an easy task. We've rounded up the latest news, tips, white papers and webcasts to help you achieve maximum performance on your iSeries. >> Webcast: iSeries Navigator -- Managing system performance, with IBM's Sue Townsend
>> Send in your time-saving performance trick or tip. You could win a great prize.
ADVICE:
>> Performance problem solved
TIP :Look at performance with a green-screen graphic tool.
>> Achieve greater processing efficiency with delayed access paths
TIP :There's more than meets the eye to the CRTLF command. Discover what you can do with the Access path maintenance parameter.
>> Quickly identify performance problems using V5R2 Display Performance Data Graphics
TIP :The new graphics support displays graphs for such things as 5250 transaction count and total CPU utilization.
>> Use DSPFD to track file accesses and nip performance issues in the bud
TIP :With journaling you can gather information on the number of updates to a file and prevent performance problems.
>> Search400 expert John Brandt answers questions on performance
TIP :Site expert John Brandt answers remaining questions from live Webcast.
>> Performance tuning of a batch job
TIP :Use up to 80% CPU and cut your time considerably when updating files.
>> Use CPU utilization guideline values to monitor high-priority (interactive) jobs
TIP :Monitor CPU utilization for critical apps and get performance warnings in advance.
>> Use the CHGQRYA command to help lessen interactive workloads
TIP :With CHGQRYA you can stop runaway queries before they start and improve performance.
>> Replace Performance Monitor commands in OS/400 V5R1
TIP :The OS/400 Performance Monitor feature was replaced with Performance Monitor feature. Learn all about it here.
>> Balance your disk usage for optimum performance
TIP :With the STRASPBAL command you can balance disk utilization in one of three ways.
>> Using STRDBG to analyze OPNQRYF
TIP :When you use the STRDBG command, the OS generates additional valuable information on joblog.
>> Use RECOVER parameter to get better restarts after system failures
TIP :The RECOVER parameter can play a critical role in repairing access paths after a system failure.
>> Get rid of deleted records and improve performance
TIP :Remove deleted files, then you can reclaim the storage space and get the DASD and performance back.
>> Get rid of deleted records and improve performance - Part 2
TIP :Alternatives and comments to removing deleted files.
>> Tuning the iSeries
ASK THE EXPERTS :I'd like some information on performance tuning for the iSeries. Is there a simple way to tune up the iSeries? I'm running ...
>> Slow iSeries response time
ASK THE EXPERTS :We have an iSeries 820 with V5R1 OS/400. For the last few days we've gotten complaints from our users regarding slow response ...
>> Primary key constraint vs. a unique index
ASK THE EXPERTS :Usually, if creating PF's and LF's the primary key should not be defined on the PF, but on the LF instead -- this should ...
>> ODBC performance issues
ASK THE EXPERTS :We are using Excel of Win98 as a pivot table viewer for summarized information from DB2 files via Client Access 5.1 ODBC ...
>> Tune the program for maximum efficiency
ASK THE EXPERTS :How can you tune the program for maximum efficiency?
>> My response time is very poor
ASK THE EXPERTS :I have a new 270 running 5.1 that is approximately twice the size of my old system. I am not running anymore than I was ...
>> Will too many data paths cause poor performance?
ASK THE EXPERTS :We have one particular batch job on our system which runs with very poor performance. On examination the job has 2000+ open ...
>> Storage pools paging options
ASK THE EXPERTS :I have a question in regards to storage pools, *calc or *fixed. We just migrated from a S30 to an 820 with 180.g running 4.5. ...
>> Setting up auxiliary storage pools
ASK THE EXPERTS :Is it possible to dedicate a certain area on the disk for a specific application? (This would improve performance as in ...
>> iSeries performance: Time for a tune-up
WEBCASTS :John will discuss low-level tuning: Defining Subsystems, Classes, Memory Pools and allocation of resources to improve your ...
WHITE PAPERS:
>> How big is it really? Memory planning in Java
>> Domino for AS/400 performance tuning
>> AS/400 performance tools for Unix application developers
>> The AS/400 Optimizing Translator
>> Using AS/400 Database Monitor to identify and tune SQL queries

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