Do you see any messages in either:
- syslog
- ASM or database alert log
- any trace files created by either ASM or the database
during that time?
On Thu, Apr 19, 2018 at 12:25 AM, Purav Chovatia <puravc@xxxxxxxxx> wrote:
We are on RHEL 6.6 running a 2-node Oracle 12c RAC.
All of a sudden, for 2-3 minutes, DATADG (asm diskgroup containing all
data files) freezes for 2-3minutes with iostat showing 100% utilisation,
very high svctm and very high write_await. But the r/s, w/s rsec/s and
wsec/s is 0. Meaning no IO but still disk fully busy. So it’s like a freeze.
Has anybody experienced this and can somebody help as to what could be the
reason?
Transparent huge pages were not disabled and general huge pages were not
configured. Now both done.
Many thanks
