FYI. Here is another good document:
https://www.duo.uio.no/bitstream/handle/10852/10099/CarlHenrikLunde.pdf
Best Regards
Stefan Koehler
Independent Oracle performance consultant and researcher
Website: http://www.soocs.de
Twitter: @OracleSK
Stefan Koehler hat am 8. Mai 2018 um 10:13 geschrieben:--
Hello Chris,
at first you need to identify where the time is spent in the whole I/O stack
(e.g. I/O scheduler, SCSI, etc.).
For example you can do that with blktrace on Linux:
http://www.fis.unipr.it/doc/blktrace-1.0.1/blktrace.pdf
Anything further is related to this drill-down outcome :-)
Best Regards
Stefan Koehler
Independent Oracle performance consultant and researcher
Website: http://www.soocs.de
Twitter: @OracleSK