>>> On Sun, Feb 24, 2008 at 9:24 AM, in message <[EMAIL PROTECTED]>, Pieter Harder <[EMAIL PROTECTED]> wrote: -snip-
>> My further understanding is that CMMA should not be used. > Why? What is broken? Pretty much the whole thing. On a too-frequent basis it would go pathological and hurt you more than help you. According to Martin Schwidefsky, however, about a week ago, he's changed his opinion on CMMA. He gave me this URL to look at: http://www.vm.ibm.com/perf/reports/zvm/html/530cmm.html Look it over and make sure you meet the maintenance requirements. Since I'm not a performance expert, I can't really assess the new-and-improved CMMA myself. I have to depend on other people for that. -snip- > For SAP CMM-1 doesn't really help. SAP basically works on a > grab-everything-there-is-and-don't-release-it strategy. Does SAP also touch every page it allocates on a frequent basis? If not, then CMM-1 should still be able to help. > I asked on the list > whether anybody had any experience or data on SAP and CMM-1, but got no > replies. Not few replies, but *none*. So I seem to be in virgin territory > there. I'm on occasion working with a customer that is going to be doing this as well. Our original advice was use CMM-1. I may need to revisit that with them, but I haven't had much contact with them for a while. > For now CMMA seems a lot easier to do (far less moving parts involved), and > I have all the requirements. Not sure how many moving parts you think CMM-1 has. As far as I can see, it's loading the kernel module and echoing some values into /proc/sys/vm/cmm_* Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
