Here I am, I've done the test with Bootchart. As supposed I'm not so able to understand the graphs but as I can see they're very different, also if I can't understand if mdadm is responsible for such a different behaviour. As I can see maybe isn't a mdadm issue because the "slowness" start very soon in the boot process and the CPU seems "crazy" after a few seconds. The CPU/IO ratio is very high when the 3 GiB of RAM are installed and more balanced when there are only 2.5 GiB.
An important thing I think I haven't explained so well is that the slowness is *permanent*, it isn't limited to the boot phase.*All* of the OS is slow *after* the boot process, so it's unusable in that condition. This is why I can't leave the additional 512 MiB bank slotted in, slowness at boot could be acceptable for me, but in the "after" condition the OS is too slow to be usable :( This is the best I can do for now, please tell me if you need something else and if there is a chance to see this bug fixed in this Ubuntu release or if I need to wait 'till October for the next release/kernel :( Is the situation clearer? ** Attachment added: "bootchart logs" http://launchpadlibrarian.net/15832578/Bootchart.tar.gz -- [Hardy] 3 GiB of RAM make linux *slow* https://bugs.launchpad.net/bugs/245222 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
