Dear all,
there is a lot to read about z/VM and Linux performance. Also about memory over commit.
but I didn`t find "real life" performance data about zLinux & SAP or Oracle or Tomcat
(nor other
"standard" Application-Server) and how the perform while over commit memory.
A special point of interest would be:
- How many escon-channels do you use for swap under z/VM ?
- How much (in percent) do you over commit memory for a Linux-guest ?
- What`s about fibre-channel ? Is there a much better performance and is it possible
to do much more memory over commit ?
- If yes, how much more ?
As I can say so far, 20% memory over commitment in general works. We us 4
escon-channels to the z/VM swap-devices.
I would be happy, if someone can share some "real life" experience with us.
Regards,
Martin Lonkwitz
Martin Lonkwitz Lufthansa Systems GmbH
UNIX Systems Engineer FRA AR/ISS
Systemplanung,-betrieb Am Weiher 24
und Entwicklung D-65451 Kelsterbach
Telefon:(069) 696-72456
Externer Servicepartner der Firma
networker, projektberatung GmbH
Am Kaltenborn 1
61462 K�nigstein
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