> Another test we ran yesterday where to tar (WITHOUT gzip, > only tar) 100 > Mb, we ran the test about 30 times, without modifing the > enviroment, the > 70-80% times we get about 1.4s, but 20-30% times the time > vary from 2s to > 8s, without any reason, then, the "specialist" from ibm told > us that we > must try with suse (kernel 2.2), because "maybe" the kernel > from redhat > have some problems. > what do you think?
I think you need a different "specialist". This one is playing Easter Egg Hunt with you and giving you bogus information. If anything, going back to a 2.2 kernel will make it worse, as that release lacked several important improvements. The variation in times is not too unusual if there are other virtual machines active on the same VM image -- CP is doing something else and has to timeslice. Do you have a VM performance tool installed, ie FCON or ESAMON, or even RTM/VM? Wall clock time isn't really going to tell you very much about what's happening in your environment. -- db
