In crs alert.log, below message is seen every 30 minutes in 12.2.0.1 GI.
[OCTSSD(9932)]CRS-2412: The Cluster Time Synchronization Service detects that the local time is significantly different from the mean cluster time
ctss is running in observer mode, because NTP is running.
$ crsctl check ctss CRS-4700: The Cluster Time Synchronization Service is in Observer mode.
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When starting up an Oracle database, the below errors occur:
ORA-27125: unable to create shared memory segment Linux-x86_64 Error: 28: No space left on device Additional information: 3773 Additional information: 3221225472
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1)Check to make sure there is no databases still using this ORACLE_HOME:
$ srvctl status database -thishome
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Due to GI_HOME restricted access, you might get following errors when you extract opatch utility to GI_HOME:
checkdir error: cannot create /u01/app/12.2.0.1/grid/OPatch Permission denied unable to process OPatch/config/opatch.properties.
Here is one of the appropriate way for extracting opatch utility :
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