Because they are sized correctly and will not cause the re-sizing exercise. If all the messages fit, Then the default doesn't matter. But resizing the largest one means less resizing elsewhere. If you are resizing more than 10% of your messages, that could be a very large number and long Time for XCF to signal all the LPARs connected. In your case, you have a 61K, and it's probably there for a specific message from an application. I'd still make the 32k the default. Joan Kelley at the P'OK labs used to test all these configs, and that was her recommendation. Any customers who have used this have reduce their resizing. Your mileage will vary...
-----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Mark Zelden Sent: Tuesday, February 19, 2013 10:06 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: XCF transport classes On Tue, 19 Feb 2013 09:25:17 -0800, Norman.Hollander <norman.hollan...@desertwiz.biz> wrote: >Why do you want to get rid of the CTC connections? Do you need them >for something else? >Are these SCTCs or FCTCs? If yes, there are times when these may be >faster than the CF. >I also recommend 3 Transport Classes: 1K, 8K and 20/32K, with the last >one being the default. > Norman, why would you recommend 20/32K being the default over 1K? In most environments I look at the number of messages sent to the 1K class are perhaps 100-1000 times higher. Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
