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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 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.
Configuring and monitoring Informix®
The sysadmin Database
The sysadmin database contains the tables that contain and organize the Scheduler tasks and sensors, store data collected by sensors, and record the results of Scheduler jobs and SQL administration API functions.
The Scheduler tables
The Scheduler stores information about tasks and sensors in five tables in the sysadmin database: ph_task, ph_run, ph_group, ph_alert, and ph_threshold.
The ph_threshold Table
The ph_threshold table contains information about thresholds for Scheduler tasks.

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.
    - Configuring and monitoring Informix®
      - Database configuration parameters
        The Informix® database server uses a configuration file, which is called the onconfig file, during initialization. This file contains default configuration parameter values. You can modify the parameter values to improve performance and other characteristics of the instance or database.
      - The sysmaster database
        These topics describe the sysmaster database and provide reference information for the system-monitoring interface (SMI).
      - The sysadmin Database
        The sysadmin database contains the tables that contain and organize the Scheduler tasks and sensors, store data collected by sensors, and record the results of Scheduler jobs and SQL administration API functions.
        The Scheduler tables
        The Scheduler stores information about tasks and sensors in five tables in the sysadmin database: ph_task, ph_run, ph_group, ph_alert, and ph_threshold.
        The ph_task Table
        The ph_task table contains information about Scheduler tasks and sensors. The ph_task table contains built-in tasks and sensors that are scheduled to run automatically.
        The ph_run Table
        The ph_run table contains information about how and when each Scheduler task or sensor ran.
        The ph_group Table
        The ph_group table contains information about the Scheduler group names. The ph_group table contains several groups that are used to categorize built-in tasks and sensors, as well as the default group MISC.
        The ph_alert Table
        The ph_alert table contains information about event alarms generated by the database server or alerts generated by the Scheduler. Alerts that are associated with built-in tasks and sensors are automatically added to the ph_alert table.
        The ph_threshold Table
        The ph_threshold table contains information about thresholds for Scheduler tasks.
        The results tables
        The results tables contain historical data about sensors that are run by the Scheduler.
        The command_history table
        The command_history table contains the list and results of all the SQL administration API functions that were run in the previous 30 days.
        The storagepool table
        The storagepool table in sysadmin database contains information about all of the entries in the storage pool in an Informix® instance. Each entry represents free space that the server can use when automatically expanding a storage space.
        The tenant table
        The tenant table in the sysadmin database contains information about the tenant databases.
      - Disk Structures and Storage
      - Interpreting Logical-Log Records
    - Administrative Utilities
    - SQL Administration API
    - Appendixes
  - 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.

The ph_threshold Table

The ph_threshold table contains information about thresholds for Scheduler tasks.

The ph_threshold table contains built-in thresholds that are associated with built-in tasks and sensors. For example, a threshold named COMMAND HISTORY RETENTION determines the length of time rows should remain in the command_history table.

Table 1. The ph_threshold table
Column	Type	Description
id	integer	Threshold ID.
name	char	The name of the threshold.
task_name	varchar	Scheduler task name associated with the threshold. Must be the same as a value in the tk_name column in the ph_task table.
value	lvarchar	The value of the threshold.
value_type	char	The data type of the value column: STRING NUMERIC NUMERIC(p,s)
description	lvarchar	A long description of the threshold.