I've just spent the day playing with stack traces.
Stefan, your paper and presentation are outstanding!
Of particular interest was the wait_even["event name"] syntax that allows
dumping stack traces in a 10046 trace file.
Somehow I had missed learning about that, very cool.
Should anyone be interested in this topic, here is my reading list for the
day.
Note: of course there is Perl :)
https://manybutfinite.com/post/journey-to-the-stack/
Journey to the Stack, Part I
https://manybutfinite.com/post/anatomy-of-a-program-in-memory/
Anatomy of a Program in Memory
https://manybutfinite.com/post/how-the-kernel-manages-your-memory/
How The Kernel Manages Your Memory
If you are interested in dumping the values from little endian words
http://perldoc.perl.org/perlpacktut.html
Perl pack tutor
Leading up to:
Paper:
http://www.soocs.de/public/talk/151118_DOAG2015_Identifying_Performance_Issues_Beyond_The_Oracle_Wait_Interface_PDF.pdf
Identifying performance issues beyond the Oracle wait interface
Presentation:
http://www.soocs.de/public/talk/160616_DOAG_Regio_NUE_Identifying_Performance_Issues_Beyond_The_Oracle_Wait_Interface_PPT.pdf
Troubleshooting Oracle performance issues beyond the Oracle wait interface
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
Principal Consultant at Pythian
Pythian Blog http://www.pythian.com/blog/author/still/
Github: https://github.com/jkstill
On Wed, Aug 1, 2018 at 6:08 AM Stefan Koehler <contact@xxxxxxxx> wrote:
Hello Lothar,
the numbers are described on slide 10 (
http://www.soocs.de/public/talk/160616_DOAG_Regio_NUE_Identifying_Performance_Issues_Beyond_The_Oracle_Wait_Interface_PPT.pdf)
or on page 5 (
http://www.soocs.de/public/talk/151118_DOAG2015_Identifying_Performance_Issues_Beyond_The_Oracle_Wait_Interface_PDF.pdf
).
Best Regards
Stefan Koehler
Independent Oracle performance consultant and researcher
Website: http://www.soocs.de
Twitter: @OracleSK
"l.flatz@xxxxxxxxxx" <l.flatz@xxxxxxxxxx> hat am 1. August 2018 um14:11 geschrieben:
something like wait time in milliseconds.
Hi,
I like to know what the numbers marked in red mean.I guess it is
sgipcwWait()+880<-gipcWaitOsd()+396<-gipcInternalWait()+20104<-gipcWaitF()
might refer to network communication. These are waits related to the ocssd.
I am also wondering about the moduls called.
E.g. gipcWaitF. My guess is that g somewhat stands for cluster and ipc
--
Regards
Lothar
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