Oracle High Availability Services (OHAS)

How to Resolve CRS-4640: Oracle High Availability Services is already active

by Ed Chen
March 7, 2023February 15, 2023

CRS-4640 We observed that osysmond.bin was taking too much memory and the usage of SWAP was increasing. At this moment, to prevent the server from… Read More »

How to Resolve CRS-4405: The following nodes are unknown to Oracle High Availability Services

by Ed Chen
August 1, 2022December 15, 2022

CRS-4405 Tried to check the status of a specific server by crsctl check cluster, but it failed with CRS-4405. [grid@primary01 ~]$ crsctl check cluster -n… Read More »

How Srvctl Stop Database

by Ed Chen
September 29, 2019January 1, 2023

There're 4 levels that can stop a RAC database, each level has different effect on the RAC system. As for stopping a single-instance database, it… Read More »