Stefan,
I agree about focusing on cpu (and perhaps memory). As for perf, from what
I have seen it should be available. I'll check path, but I thought it might
be a module not installed. I was able to start "perf stat" (didn't get a
command not found) but then got some lib error. I'll go back and check.
Henry
On Fri, Aug 11, 2017 at 1:42 PM, Stefan Koehler <contact@xxxxxxxx> wrote:
Hello Henry,
not quite sure what you are referring to as you are using Linux kernel
2.6.32-696.1.1.el6.x86_64 and perf is based on the perf_events interface
and it is exported by Linux kernel >= 2.6.31 - maybe it is just not in your
path ("/usr/sbin/perf").
In addition i may got your description wrong but you wrote "A select
count(*) from dba_objects showed this behavior as did Jonathan Lewis's
kill_cpu script." - so you can completely ignore the I/O or network stack
and focus on CPU (and memory) as kill_cpu (https://jonathanlewis.
wordpress.com/2016/10/03/kill-cpu/) has nothing to do with these stacks.
... and if you want to analyze the CPU (and memory caching) behavior -
measure it with perf and you will see the difference.
Best Regards
Stefan Koehler
Independent Oracle performance consultant and researcher
Website: http://www.soocs.de
Twitter: @OracleSK
Henry Poras <henry.poras@xxxxxxxxx> hat am 11. August 2017 um 19:27geschrieben:
available. I've asked the sysadms about this.
Some more minor updates and responses to suggestions:
Stefan - nice articles. Unfortunately neither turbostat or perf stat is
