[oracle@ol65-12104-em ~]$ $OMS_HOME/bin/emctl start oms
Oracle Enterprise Manager Cloud Control 12c Release 4
Copyright (c) 1996, 2014 Oracle Corporation.  All rights reserve
Starting Oracle Management Server...
Starting WebTier...
WebTier Successfully Started
Oracle Management Server is still in the process of getting started.
Timed out waiting for Oracle Management Server to start.
Check error and log files.
Check EM Server log file for details: /u01/app/oracle/gc_inst/user_projects/domains/GCDomain/servers/EMGC_OMS1/logs/EMGC_OMS1.out
Oracle Management Server is Down
[oracle@ol65-12104-em ~]$ vi /u01/app/oracle/gc_inst/user_projects/domains/GCDomain/servers/EMGC_OMS1/logs/EMGC_OMS1.out
[oracle@ol65-12104-em ~]$

] The system is vulnerable to security attacks, since it trusts certificates signed by the demo trusted CA.>
May 8, 2016 3:47:26 PM oracle.security.jps.internal.policystore.ldap.LdapPolicyStore initial
INFO: Container is not ready at the point null
May 8, 2016 3:47:27 PM oracle.security.jps.internal.audit.AuditServiceImpl registerInternal
WARNING: Cannot register to audit service for component "JPS".
May 8, 2016 3:47:27 PM oracle.security.jps.internal.policystore.ldap.LdapPolicyStore initial
INFO: Container is not ready at the point null
<May 8, 2016 3:48:58 PM MYT> <Warning> <JDBC> <BEA-001110> <No test table set up for pool "sysman-opss-ds". Connections will not be tested.>

[oracle@ol65-12104-em ~]$ grep MemTotal /proc/meminfo
MemTotal:        8163456 kB
[oracle@ol65-12104-em ~]$ grep SwapTotal /proc/meminfo
SwapTotal:       8388604 kB
[oracle@ol65-12104-em ~]$