=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= SEARCH390| Expert Question of the Week Tip October 1, 2001
Answers to your technical questions and expert advice for the 390 community. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= IN THIS ISSUE | Table of Contents 1. Expert Question of the Week - Performance problems due to system dumps - DEVL and LPAR configuration issues - Performance: IMS vs DB2 2. IMPORTANT ANNOUNCEMENTS AND LINKS - Live expert discussion day in our OS forum - New white paper - Featured topic: Performance Management - Best Web Links--Systems Management ____________________________________________________________________ ********* SPONSORED BY: Postmaster Direct ************ What do YOU want in your e-mailbox? How about FREE info and offers about computers, networking, wireless devices, finance and lots more? Visit http://search390.techtarget.com/postmasterDirect/, choose the topics that interest you, and you'll get the e-mail you want. ____________________________________________________________________ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Performance problems due to system dumps | by Mark Zelden We are experiencing performance problems caused by system dumps in the last three months on several of our systems. The dumps are from CICS and are not dumping CSA and are generally not large dumps. The delays are due to paging that (I believe) are caused by stealing by the dump process. UIC is 180-200. The system has 395 mips with storage of 1456 meg cental and 1024 expanded. This seems like problems we had way back in MVS 4.1 or 4.2... CLICK for Mark's answer: http://search390.techtarget.com/ateQuestionNResponse/0,289625,sid10_cid406758_tax287555,00.html =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= DEVL and LPAR configuration issues | by Steve Samson Below is the current LPAR config for 9672-x57. The TD02 LPAR will soon be de-activated. I know we exceed the 2:1 LCP:PCP ROT. Weights were determined using a mips chart designation of 748 mips for the box. I know this has changed recently. SLA on the DEVL LPAR are not being met. "Organizational structure" stops me from changing the weights without buy-in. LPARs are not capped. Workload is batch/tso/IDMS. Paging to expanded is 20-30 per hour, AUX is <5 per hour. My questions are: Would adding a 3rd LP to DEVL help or hurt throughput? How can I best measure this? CLICK for Steve's answer: http://search390.techtarget.com/ateQuestionNResponse/0,289625,sid10_cid391954_tax285125,00.html =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Performance: IMS vs DB2 | by Tom Moulder Is it always true that for very high volume data IMS gives better performance than DB2? What are the situations when we can think of moving from IMS to DB2 without degrading performance? Is housekeeping of a DB2 database (including CPU and storage cost) higher than that of an IMS database? CLICK for Tom's answer: http://search390.techtarget.com/ateQuestionNResponse/0,289625,sid10_cid404104_tax286336,00.html ____________________________________________________________________ :::::::::: DON'T MISS THESE IMPORTANT MESSAGES AND LINKS ::::::::: Do you have performance management related questions? If you do, make sure to join us tomorrow, Tuesday Oct 2, in our Operating Systems discussion forum. Steve Samson, Senior Technical Consultant and search390 Performance and Workload Management Expert will be live in the OS forum from 3:00 pm EDT to 5:00 pm EDT to answer all of your questions on the spot! To start posting questions for Steve now, go to: http://search390.discussions.techtarget.com/WebX?[EMAIL PROTECTED]^[email protected]!viewtype=&skip=&expand= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= NEW WHITE PAPER | MVS Performance Management - OS/390 Edition As a registered member of search390.com, you're entitled to a complimentary copy of MVS Performance Management - OS/390 Edition written by Stephen L. Samson. MVS Performance Management OS/390 Edition by Stephen L. Samson, Senior Technical Staff Member, Candle Corporation outlines IBM's MVS operating system and its relationship to performance management. It is not an introduction to MVS, or a guide to MVS system programming, but it gives a nice overview of the MVS operating system, its history and evolution. http://search390.techtarget.com/whitepaper/1,289194,sid10_gci773129,00.html =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= THIS WEEK'S FEATURED TOPIC | Performance Management For IT managers, maintaining system performance is essential, but not always easy. That's why OS/390 Performance Mgmt Expert Steve Samson will be live in our OS forum Tues, 10/2, from 3-5 ET to answer questions and offer advice. http://search390.techtarget.com/featuredTopic/0,290042,sid10_gci772843,00.html =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Systems Management | Best 390 Web Links Keeping an eye on all aspects of a mainframe enterprise system can be a daunting task. Begin with "Systems Management Strategies" for sources that will help give you the big-picture view. Once you've developed a plan, click on sections like "Operations," "Performance Tuning," and "Security" to get down to the nitty-gritty of everyday issues. http://search390.techtarget.com/bestWebLinks/0,289521,sid10_tax1487,00.html ____________________________________________________________________ ::::::::::::::::::: SEARCH390 CONTACTS ::::::::::::::::::: BJ RAMA, Site Editor ([EMAIL PROTECTED]) Send us your original articles and best practices. ____________________________________________________________________ CATHERINE DOSS, Assistant Editor ([EMAIL PROTECTED]) Send us your white papers and Best Web Links. ____________________________________________________________________ JACK PICKELL, News Editor ([EMAIL PROTECTED]) Send in your product announcements and poll ideas. ____________________________________________________________________ TIM KEOUGH ([EMAIL PROTECTED]) Sponsor this or any other TechTarget tip/newsletter. ____________________________________________________________________ If you no longer wish to receive this newsletter simply reply to this message with "REMOVE" in the subject line. 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