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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.
Administrator's Guide
The Informix® Administrator's Guide provides the information required to administer HCL Informix.
Logging and log administration
Logical log
Log sbspaces and smart large objects
Sbspace logging
Turn logging on or off for an sbspace
You can control whether logging is on of off for an sbspace with several different methods.

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.
    - The database server
    - Disk, memory, and process management
    - Logging and log administration
      - Logging
      - Manage the database-logging mode
        You can monitor and modify the database-logging mode.
      - Logical log
        What is the logical log?
        Location of logical-log files
        When the database server initializes disk space, it places the logical-log files and the physical log in the root dbspace.
        Identification of logical-log files
        Status flags of logical-log files
        Size of the logical-log file
        Dynamic log allocation
        Freeing of logical-log files
        Log blobspaces and simple large objects
        Log sbspaces and smart large objects
        Sbspace logging
        Logging for smart large objects
        Logging for updated smart large objects
        Turn logging on or off for an sbspace
        You can control whether logging is on of off for an sbspace with several different methods.
        Smart-large-object log records
        Prevent long transactions when logging smart-large-object data
        Logging process
      - Manage logical-log files
      - Physical logging, checkpoints, and fast recovery
      - Manage the physical log
    - Fault tolerance
    - High availability and scalability
      A successful production environment requires database systems that are always available, with minimal if any planned outages, and that can be scaled quickly and easily as business requirements change.
    - Distributed data
    - Overview of automatic monitoring and corrective actions
      You can use the SQL administration API, the Scheduler, and drill-down queries to manage automatic maintenance, monitoring, and administrative tasks.
  - 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.
  - 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.

Turn logging on or off for an sbspace

You can control whether logging is on of off for an sbspace with several different methods.

If you want to use logging in an sbspace, specify the -Df "LOGGING=ON" option of the onspaces command when you create the sbspace. If logging is turned off in the sbspace, you can turn on logging for smart large objects in specific columns. One column that contains smart large objects can have logging turned on while another column has logging turned off.

To verify that smart large objects in an sbspace are logged, use the oncheck -pS sbspace_name | grep " Create Flags" command.

If you create smart large objects in the sbspace with the default logging option and you see the LO_NOLOG flag in the output, the smart large objects in this sbspace are not logged. If you see the LO_LOG flag in the output, all smart large objects in this sbspace are logged.

You can modify the logging status of an sbspace in any of the following ways.


Function or statement to specify	Logging action	References
onspaces -ch -Df "LOGGING=ON" onspaces -ch -Df "LOGGING=OFF"	Turns logging on or off for an existing sbspace	Alter storage characteristics of smart large objects onspaces -ch: Change sbspace default specifications
The SQL administration API task() or admin() function with the set sbspace logging on or set sbspace logging off argument	Turns logging on or off for an existing sbspace	set sbspace logging argument: Change the logging of an sbspace (SQL administration API)
LOG option in the PUT clause of the CREATE TABLE or alter table statement	Turns on logging for all smart large objects that you load into the column	Logging PUT Clause
mi_lo_create DataBlade® API function	Turns off logging for a smart large object when it is initially loaded	Informix® DataBlade® API Function Reference
mi_lo_alter DataBlade® API function	Turns on logging after the load is complete	Informix® DataBlade® API Function Reference
ifx_lo_create Informix® ESQL/C function	Turns off logging for a smart large object when it is initially loaded	Informix® ESQL/C Programmer's Manual
ifx_lo_alter Informix® ESQL/C function	Turns on logging after the load is complete	Informix® ESQL/C Programmer's Manual