Re: CPU waiting for I/O in Exadata Database Node
From: Steve Harville <steve.harville_at_gmail.com>
Date: Tue, 22 May 2018 15:16:36 -0500
Message-ID: <CAGd4=DTwEHEp__TZqaMEy9Qgv9L5BTH=A20VsvgmVCRk0YBbSg_at_mail.gmail.com>
Date: Tue, 22 May 2018 15:16:36 -0500
Message-ID: <CAGd4=DTwEHEp__TZqaMEy9Qgv9L5BTH=A20VsvgmVCRk0YBbSg_at_mail.gmail.com>
I have seen this on Exadata when reading/writing to NFS mounts.
On Tue, May 22, 2018 at 1:29 PM Ls Cheng <exriscer_at_gmail.com> wrote:
> Hi
>
> I am observing quite high CPU waiting for I/O in Exadata Database Nodes
> (vmstat output). but from iostat there no waits at all (which is obvious
> since heavy I/O is done through infiniband).
>
> Anyone know what can be the CPU waiting for?
>
> Thanks
>
>
>
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