Re: MpxTestDaemon

It is an old Kernel.

Oracle Linux 6.9. I don't have the kernel version handy.

I recommended the client open a case with EMC, as there is no documentation or information available publicly anywhere .

On Wed, Oct 21, 2020 at 22:17 <dimensional.dba_at_comcast.net> wrote:

> The intel MPX “multi processor extensions” were removed from the kernel
> and gcc in 2019. You of course could be running an old kernel.
>
>
>
>
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
> Behalf Of *MacGregor, Ian A. (Redacted sender "ian" for DMARC)
> *Sent:* Wednesday, October 21, 2020 10:10 AM
> *To:* Oracle-L Freelists <oracle-l_at_freelists.org>; jkstill_at_gmail.com
> *Subject:* Re: MpxTestDaemon
>
>
>
> A shot in the dark, MPX is often an abbreviation for multiplex, but can
> also mean "multi-processor extension". I wonder if it has something to so
> with the latter?
>
>
>
>
> Ian A. MacGregor
> SLAC IT
>
> SLAC National Accelerator Laboratory
> ------------------------------
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> on
> behalf of Jared Still <jkstill_at_gmail.com>
> *Sent:* Tuesday, October 20, 2020 3:00 PM
> *To:* Oracle-L Freelists <oracle-l_at_freelists.org>
> *Subject:* MpxTestDaemon
>
>
>
> Dear list:
>
>
>
> I am investigating a process 'MpxTestDaemon' on a Linux server (RedHat 6.9
> as I recall).
>
>
>
> This server is running Oracle 12.1, and has 1.5T of RAM.
>
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> It is a standalone server, not RAC.
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> There are some anomalous things occurring with this process.
>
>
>
> For instance, at times pidstat reports impossible numbers of minflt/s
> (mem faults not requiring disk access) being performed: approx 1.85 * 10e18
>
>
>
> Right now though all I am asking is this:
>
>
>
> Does anyone know what this process is?
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>
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> Neither Oracle nor the Google have anything helpful.
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> In Oracle's case, no references at all.
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> In the meantime, I shall see if I can find out what it is doing.
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> Thanks.
>
>
>
> Jared Still
> Certifiable Oracle DBA and Part Time Perl Evangelist
>
> Principal Consultant at Pythian
>
> Oracle ACE Alumni
>
> Pythian Blog http://www.pythian.com/blog/author/still/
>
> Github: https://github.com/jkstill
>
> --
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist Principal Consultant at Pythian
Oracle ACE Alumni
Pythian Blog http://www.pythian.com/blog/author/still/ Github: https://github.com/jkstill

--
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