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    SubjectRe: 2x Oracle slowdown from 2.2.16 to 2.4.4


    On Wednesday, July 11, 2001 07:08:21 PM +0200 Andrea Arcangeli
    <andrea@suse.de> wrote:

    > On Wed, Jul 11, 2001 at 09:44:19AM -0700, Brian Strand wrote:
    >> Our Oracle configuration is on reiserfs on lvm on Mylex. Our workload
    >> is not entirely cached, as we are working against an 8GB table, Oracle
    >> is configured to use slightly more than 1GB of memory, and there is
    >> always several MB/s of IO going on during our queries. The "working
    >> set" of the main table and indexes occupies over 2GB.
    >
    > As I suspected there is the VM in our way. Also reiserfs could be an
    > issue but I am not aware of any regression on the reiserfs side, Chris?

    reiserfs has a big O_SYNC penalty right now, which can be fixed by a
    transaction tracking patch I posted a month or so ago. It has been tested
    by a few people as a large improvement. Brian, I'll update this to 2.4.6
    and send along.

    -chris

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