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Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
System administration
These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
DB-Access User's Guide
The Informix® DB-Access User's Guide describes how to use the DB-Access utility to access, modify, and retrieve information from Informix database servers.
The full-screen menu interface
The DB-Access full-screen menu interface guides you through running SQL statements.
The Connection and Session options
Use the Connection option if you want to connect to a specific database server and database or explicitly disconnect from the current database environment. Use the Session option to display information about the current DB-Access session.

Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
- System administration
  These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
  - List of utilities
    HCL Informix® includes utilities and applications that you can use to perform administrative tasks and capture information about configuration and performance.
  - Administrator's Guide
    The Informix® Administrator's Guide provides the information required to administer HCL Informix.
  - Administrator's Reference
    The Informix® Administrator's Reference includes comprehensive descriptions of HCL Informix configuration parameters, the system-monitoring interface (SMI) tables in the sysmaster database, the syntax of database server utilities such as onmode and onstat, logical-log records, disk structures, event alarms, and unnumbered error messages.
  - DB-Access User's Guide
    The Informix® DB-Access User's Guide describes how to use the DB-Access utility to access, modify, and retrieve information from Informix database servers.
    - Getting started with DB-Access
      DB-Access provides a menu-driven interface for entering, running, and debugging Structured Query Language (SQL) statements and Stored Procedure Language (SPL) routines. You can also run DB-Access interactively from the command line.
    - The full-screen menu interface
      The DB-Access full-screen menu interface guides you through running SQL statements.
      - The Query-language option
        Use the Query-language option to enter, modify, save, retrieve, and run SQL statements. DB-Access retains the statements, if any, in the editor. These statements are called the current statements.
      - The Database option
        Use the Database option to work with databases and transactions.
      - The Table option
        Use the Table option to work with tables.
      - The Connection and Session options
        Use the Connection option if you want to connect to a specific database server and database or explicitly disconnect from the current database environment. Use the Session option to display information about the current DB-Access session.
        Implicit closures
        DB-Access closes any open connections or databases when you connect to a new environment.
    - Appendixes
  - High-Performance Loader User's Guide
    The describes how to use the HCL Informix® to load and unload large quantities of data efficiently to or from Informix databases.
  - Performance Guide
    The Informix® Performance Guide describes how to configure and operate your HCL Informix database server to improve overall system throughput and to improve the performance of SQL queries.
  - SNMP Subagent Guide
    The describes the Simple Network Management Protocol (SNMP) and the software that you need to use SNMP to monitor and manage HCL Informix® database servers and databases.
  - InformixHQ Guide
    InformixHQ is a modern web console for visualizing, monitoring, and managing your Informix server instances. It is purpose built for ease-of-use, scaling out, and optimizing DevOps needs. It provides critical performance management capabilities, monitoring how key performance metrics are changing over time and tracking how efficiently Informix is running your workload even when you’ve stepped away from your screen. Its monitoring system feeds directly into a customizable alerting system so you can be immediately alerted via email, Twilio, or PagerDuty whenever an issue occurs on one of your Informix database server instances. InformixHQ is designed to be scalable to efficiently manage and monitor as many Informix database server instances as you need. Moreover, it's a tool that can be shared by the DBAs, the app developers, the ops engineers, and management and accessed from any desktop, laptop, or mobile device. InformixHQ is the centralized hub for graphical monitoring, alerting, and administration of your Informix database servers.
- Backup and Restore Guide
  The Informix® Backup and Restore Guide describes how to use the Informix ON-Bar and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
- Enterprise Replication
  The HCL® Informix® Enterprise Replication Guide describes the concepts of data replication using Informix Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.

The Connection and Session options

Use the Connection option if you want to connect to a specific database server and database or explicitly disconnect from the current database environment. Use the Session option to display information about the current DB-Access session.

For the globalization considerations that apply to establishing a connection between a client application, such as DB-Access, and a database, see the Informix® GLS User's Guide. The database server examines the client locale information passed by the client, verifies the database locale, and determines the server-processing locale for transferring data between the client and the database.

On Windows™, if you specify a user identifier but no domain name for a connection to a machine that expects both a domain name and a user name (domain\user), DB-Access checks only the local machine and the primary domain for the user account. If you explicitly specify a domain name, that domain is used to search for the user account. The attempted connection fails with error -951 if no matching domain\user account is found on the local machine.

The CONNECTION menu displays the following options.


Option	Purpose
Connect	Connects to a database environment. To access a specific database, you must have permission.
Disconnect	Disconnects from the current database environment
Exit	Returns to the DB-Access main menu

When you use the Connect option, the SELECT DATABASE screen alphabetically lists all available databases on the specified database server. The database list on the SELECT DATABASE screen depends on the current connection. For example:

If no current connection exists or the current connection is an implicit default connection, all the databases that are listed in the DBPATH environment variable setting are displayed.
If a current explicit connection exists, all the databases in the DBPATH that pertain to the current server are displayed.