All, We're currently running Oracle 9i on a RHEL AS 2.1 installation. We need to upgrade to Oracle 10g, and I've half-way convinced my boss to upgrade to RHEL 4 (we're still discussing AS vs ES, since we're running 2 HT processors...). Anyway, I want to upgrade because of EOL issues whenever RHEL 5 comes out, but before he okays me wiping the server and installing 4, he wants to know if we're going to get any specific benefits out of upgrading the OS. I recall that the 2.6 kernel did a bunch of optimization stuff, but is there anything in there that would affect the performance of Oracle 10g? And if so, are there any web sites to which I can direct him? So far my googling hasn't been very productive. Maybe I'm using the wrong search terms. Thanks! Ben Weiss