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EM Express 12c Database Administration Page FAQ (Doc ID 1601454.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 12.1]
Oracle Database - Enterprise Edition - Version to [Release 12.1]
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.


EM Express is a database management tool that focuses primarily on performance management and monitoring.   However, it does include basic administration functions to assist the database administrator.

When users first log into EM Express, they see the home page which displays information about the database, as well as performance data, such as resource usage, average active sessions, and monitored SQL statements.
Database Administration Functions


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In this Document
 The three main categories of administrative tasks are:
 Frequently Asked Questions
 How can I see Advisor Data on the Memory Page?
 I'm trying to perform a task that I used to do in DB Control.  Where is it in EM Express?
 Why do I see a "Warning" icon on the Memory Page?
 In the Memory Page, why are the sizes in the Configuration region different from the Allocation region?
 In the Memory Page, why does sga_target in the Configuration region show a different value from the Current Setting in the SGA Advisor region?
 I'm on a RAC system, and the Home Page shows "Host CPU".  Which host is it showing?
 Why is the Storage menu missing the Tablespaces entry in a CDB?
 Can I manage and create Common Users with EM Express?
 Why are the whole Performance tab is missing ?
 Why are tabs missing from the Performance Hub?
 Can I see the activity breakdown by PDB?
 Why do I see PDB$SEED when viewing Activity breakdown by PDB?
 Can I plug and unplug PDBs with EM Express?
 How can I tell if I'm connected to the root container or to a PDB?
 How do I log into EM Express?
 How can I find the port on which EM Express is configured?
 How can I give users read-only access to EM Express?
 Does EM Express have support for RAC?
 When using EM Express on RAC, how can I see instance-specific information?
 EM Express seems slow when using HTTPS.  Why?
 What is the recommended screen resolution for EM Express?
 Can I run EM Express in Safari?
 How can I replace the default wallet/certificate?
 What should I do if the default XDB wallet expires?
 Why am I getting a "This Connection is untrusted" message when I try to log into EM Express?  Is this a security concern?
 Is EM Express secure?
 Do I need any database privileges to use EM Express?
 Do I need licenses or packs to use EM Express?
 Is EM Express supported on Oracle Database Standard Edition?  What about Database XE?
 How to configure EM Express on a CDB/PDB?

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