Have you eliminated possible issues with the physical and logical
connectivity between the host and the storage service?
/Hans
On 2018-04-18 11:25 AM, Purav Chovatia 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?
