ORACLE 18c in CentOs 7 “Unable to check for available memory”

Question

I download and upload to server:

1// oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm

2// oracle-database-xe-18c-1.0-1.x86_64.rpm

after I run

yum -y localinstall oracle-database-preinstall-18c-1.0-1.el7.x86_64.rpm

all fine, no problem; after I run:

rpm -i oracle-database-xe-18c-1.0-1.x86_64.rpm

all fine, no problem with result:

[root@server 000]# rpm -i oracle-database-xe-18c-1.0-1.x86_64.rpm
warning: oracle-database-xe-18c-1.0-1.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
[INFO] Executing post installation scripts...
[INFO] Oracle home installed successfully and ready to be configured.
To configure Oracle Database XE, optionally modify the parameters in '/etc/sysconfig/oracle-xe-18c.conf' and then execute '/etc/init.d/oracle-xe-18c configure' as root.
[root@server 000]#

then I go to "run last line", but when I run

/etc/init.d/oracle-xe-18c configure

in server with 4 GB RAM result is:

Unable to check for available memory

then I go to other server with 8GB in memory, and when I run:

/etc/init.d/oracle-xe-18c configure

in server with 8 GB RAM result is:

Unable to check for available memory

in both servers message is:

Unable to check for available memory

in both servers:

[root@server 000]# cat /etc/system-release;
CentOS Linux release 7.6.1810 (Core)
[root@server 000]#

also I change from default [false] to [true]:

SKIP_VALIDATIONS=true

in /etc/sysconfig/oracle-xe-18c.conf

what I can do to resolve this issue?

this is dedicated server, no VPS

Thanks by your help

Answer 1

" Unable to check for available memory "

I fixed in this form:

I go to my other server with OLD installation Oracle (running fine Oracle 11g), then I find 3 files:

oracle_env.csh    
oracle_env.sh    
nls_lang.sh

becouse this files no exist in new server, I create and put into folder Oracle:

/opt/oracle/product/18c/dbhomeXE/bin

with the content ( path correct ) into the files

1. oracle_env.csh
2. oracle_env.sh

and put this lines into they:

touch /opt/oracle/product/18c/dbhomeXE/bin/oracle_env.csh
echo 'setenv ORACLE_HOME /opt/oracle/product/18c/dbhomeXE
setenv ORACLE_SID XE
setenv NLS_LANG `$ORACLE_HOME/bin/nls_lang.sh`
setenv PATH $ORACLE_HOME/bin:$PATH' >> /opt/oracle/product/18c/dbhomeXE/bin/oracle_env.csh

after second file:

touch /opt/oracle/product/18c/dbhomeXE/bin/oracle_env.sh
echo 'export ORACLE_HOME=/opt/oracle/product/18c/dbhomeXE
export ORACLE_SID=XE
export NLS_LANG=`$ORACLE_HOME/bin/nls_lang.sh`
export PATH=$ORACLE_HOME/bin:$PATH' >> /opt/oracle/product/18c/dbhomeXE/bin/oracle_env.sh

becouse the file nls_lang.sh is very long and have many config about CHARSET, I copy from OLD server to NEW server.

after is necesary config owner/group of this files:

chown oracle:oinstall /opt/oracle/product/18c/dbhomeXE/bin/oracle_env.csh
chown oracle:oinstall /opt/oracle/product/18c/dbhomeXE/bin/oracle_env.sh
chown oracle:oinstall /opt/oracle/product/18c/dbhomeXE/bin/nls_lang.sh

also the file nls_lang.sh require 755:

chmod 0755 /opt/oracle/product/18c/dbhomeXE/bin/nls_lang.sh

is necesary login as user oracle:

su -l oracle

then I go to folder and load vars environment:

cd /opt/oracle/product/18c/dbhomeXE/bin
. ./oracle_env.sh

finally I can run the command dbca :

dbca -createDatabase -silent -gdbName ora18c -templateName XE_Database.dbc -sysPassword YourPWD1 -systemPassword YourPWD1 -dbsnmpPassword YourPWD1 -datafileDestination /opt/oracle/oradata -storageType FS -memoryPercentage 20 -emConfiguration NONE -sampleSchema false -J-Doracle.assistants.dbca.validate.ConfigurationParams=false

and I get the greath result:

[server@petro bin]$ dbca -createDatabase -silent -gdbName ora18c -templateName XE_Database.dbc -sysPassword YourPWD1 -systemPassword YourPWD1 -dbsnmpPassword YourPWD1 -datafileDestination /opt/oracle/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:
/opt/oracle/cfgtoollogs/dbca/ora18c.
Database Information:
Global Database Name:ora18c
System Identifier(SID):ora18c
Look at the log file "/opt/oracle/cfgtoollogs/dbca/ora18c/ora18c.log" for further details.
[server@petro bin]$

becouse I need PHP in this servers, I require OCI8, then I run:

/usr/bin/ea-php72-pecl install oci8
/usr/bin/ea-php71-pecl install oci8
/usr/bin/ea-php70-pecl install oci8

when this request:

**Please provide the path to the ORACLE_HOME directory. Use 'instantclient,/path/to/instant/client/lib' if you're compiling with Oracle Instant Client [autodetect] :**

simply [ENTER] then this run fine for me...

Regards.