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Oracle 18c (18.3) DBCA Issue – [DBT-50000] [DBT-50001]

While creating a on-premise 18c (18.3) database with DBCA in the silent mode I got the below error

dbca -createDatabase -silent -gdbName ora18c -templateName General_Purpose.dbc -sysPassword sys123 -systemPassword sys123 -dbsnmpPassword sys123 -datafileDestination /u01/oradata -storageType FS -memoryPercentage 20 -emConfiguration NONE -sampleSchema false

FATAL] [DBT-50000] Unable to check for available memory.
[FATAL] [DBT-50001] Unable to check the value of kernel parameter {0}
I am not too sure what exactly causes that error but i am suspecting their is something in the kernel parameters which is not right for the 18c installation, especially since i did not install the 18c per-requisites RPM and my Linux is CentOS 7.5
The Solution to this problem is to call dbca with below parameter, it can be used for CLI and GUI both.
-J-Doracle.assistants.dbca.validate.ConfigurationParams=false
Full DBCA command

dbca -createDatabase -silent -gdbName ora18c -templateName General_Purpose.dbc -sysPassword sys123 -systemPassword sys123 -dbsnmpPassword sys123 -datafileDestination /u01/oradata -storageType FS -memoryPercentage 20 -emConfiguration NONE -sampleSchema false -J-Doracle.assistants.dbca.validate.ConfigurationParams=false

Prepare for db operation
10% complete
Copying database files
40% complete
Creating and starting Oracle instance
42% complete
46% complete
50% complete
54% complete
60% complete
Completing Database Creation
66% complete
69% complete
70% complete
Executing Post Configuration Actions
100% complete
Database creation complete. For details check the logfiles at:
/u01/app/oracle/cfgtoollogs/dbca/ora18c.
Database Information:
Global Database Name:ora18c
System Identifier(SID):ora18c
Look at the log file “/u01/app/oracle/cfgtoollogs/dbca/ora18c/ora18c.log” for further details.
It will give some warnings but it is due to not using a strong password. But it should not have caused at any issues in creating the database. Lets check with SQLPLUS
SQL*Plus: Release 18.0.0.0.0 – Production on Mon Aug 13 03:13:45 2018
Version 18.3.0.0.0
Copyright (c) 1982, 2018, Oracle. All rights reserved.
Connected to:
Oracle Database 18c Enterprise Edition Release 18.0.0.0.0 – Production
Version 18.3.0.0.0
SQL> select name,open_mode from v$database;
NAME OPEN_MODE
——— ——————–
ORA18C READ WRITE

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