Jarod:
Welcome!
After your 2007 Hotsos presentation, you and your colleague David Rubio
assisted me in using DTrace to diagnose performance problems with Oracle
running on Solaris, for a large poorly written toll road system. Between
your assistance using DTrace and Cary's Profiler tool, we were able to
identify the sources of numerous problems and refactor the code to fix the
problems. That system is still running and continues to meet performance
requirements with negligible changes, despite significantly increased
traffic. I always appreciated your help and am very happy to learn you are
joining this gang.
Best wishes,
Andy
On Fri, Feb 19, 2021 at 10:53 AM Graham Wood <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
Welcome Jarod!
Cheers, Graham
On Friday, February 19, 2021, 10:26:22 AM PST, Jarod Jenson <
jarod@xxxxxxxxxxx> wrote:
Thanks for the warm welcome from all of you.
Like Cary, I have been trapped in the exciting weather event that has been
ongoing here in Texas. At times no water, no power, and no fun. It’s all
coming to an end now.
I have been working with Oracle in some shape or form for over 25 years. I
have never been a formal DBA, but I started off supporting the systems that
ran Oracle instances. First at Baylor College of Medicine with about 250
DB’s with the largest - a whopping couple of TB - to support the Human
Genome Sequencing project in the 1996-1997 timeframe. From there I went on
to (no booing) Enron and was the Director in charge of over 3000 systems
globally that supported Oracle (over 6000 total systems). My familiarity
with Oracle at this point was predominantly how to build high performance
infrastructure for deployment. For some odd reason I left Enron and started
my own consulting company - Aeysis. We focused on performance of any
application environment which clearly included Oracle the majority of the
time. As Cary mentioned I have been an avid DTrace user since its
inception. In fact, I was the first person to use it outside of the 3
person development team (please port to Linux). When I met Cary at the
Hotsos Symposium, I was actually presenting on using DTrace along side
Method R tools to account for unaccounted for time. Essentially I began
working my way up from the OS (which I am quite familiar with) more and
more into the database.
Something happened to Sun and a shift from Solaris/SPARC started in
earnest (the desire for cost reduction by companies had always been there).
Also, I was traveling about 48 weeks a year. With a wife and 2 young girls
that was not ideal. I decided to join Delphix as I found the product quite
useful, and I knew a large number of people already there for which I had a
great respect. At Delphix I started out as a Solutions Architect and then
moved over to the performance engineering team. I extended Kyle Hailey and
Tim Gorman’s work (shoutout) to perform sizing for Oracle databases. It was
this work that really got me into understanding the intricacies of how
Oracle works. Given that I still focus quite a bit on infrastructure and
OS, I put the new knowledge to work and built a single Oracle instance and
Delphix engine that could sustain over 12GB/s (big B) of disk IO over the
network - neither system had more than 6 CPUs.
I still will never say I come close to being a DBA, but I do have a very
strong drive to make Oracle perform at its peak now that I am back
consulting at Aeysis again. I look forward to learning as much as I can
here that I can apply to my daily work as well as providing input when I
can.
Thanks,
Jarod
On Feb 18, 2021, at 9:38 PM, Cary Millsap <cary.millsap@xxxxxxxxxxxx>
wrote:
I'm pleased to introduce you to the newest OakTable member, Jarod Jenson.
I met Jarod back in my Hotsos days at one of our Symposium events in
Dallas, and he's been a friend since. He was at the time (and still is)
renowned for his diagnostic skills using DTrace. Funny thing: Jarod's house
is about three miles from my house. ...No small feat in a country whose
perimeter exceeds 19 miles. ;-)
Welcome to the OakTable, Jarod. Please introduce yourself to the group
with a reply-all. A paragraph or two is customary. Tell us a little bit
about yourself.
Cary
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