DCs and GCs are complicated things. It took me a few years and many talks to experts to understand WLM as I do now. WLM talks to the hardware to see how much LPARs outside the Sysplex, but in the Capacity Group, consume.
How did you set up DCs and GCs if you don't understand their way of working. Or did others do this? This should be constantly monitored and possibly adjusted and therefor their mechanisms must be understood. It is not dangerous to drive a system to it GC limit, or to its DC limit. It has consequences, but they depend on the applications in the LPAR. We do is often, only not for LPARs with production CICSs systems, because they are to sensitive to capping. Consider the RMF CPU busy % as the value with which WLM will decide the status of the system with regard to WLM managed initiators. Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Peter Hunkeler Sent: 17 December, 2015 15:14 To: [email protected] Subject: AW: Re: What CPU capacity does WLM look at when deciding to start more batch initiators? > From my experience: the 'available capacity' is what is available within the > Defined Capacity and/or Capacity Group. > There are more precise statements about what WLM considers: it decides there > is capacity available, when the 'LPAR is less than 95% busy'. This must refer > to the available capacity with the DC or GC. Driving the system up to the GC limit is playing with fire. I assume WLM does not talk to other systems *outside* of the plex but in the same CG when it has to decide ybout how busy the system is. This is a local thing. But on the other hand, WLM must have some figures to calculate with and GC seems to be one. But what happens at times when the system is capped because the group has been exceeded? calculating with the GC in this case would yield false results for sure, doesn't it? -- Peter Hunkeler ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
