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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese 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 ReferenceThe 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.
Administrative Utilities
The onmode utilityUse the onmode utility to change the database server operating mode and perform various other operations on shared memory, sessions, transactions, parameters, and segments.
onmode -wf, -wm: Dynamically change certain configuration parametersUse the onmode -wf or onmode -wm command to dynamically change specific configuration parameters.

onmode -wf, -wm: Dynamically change certain configuration parameters

Use the onmode -wf or onmode -wm command to dynamically change specific configuration parameters.

Figure 1: Syntax:


Element	Purpose	Key considerations
-wf	Updates the value of the specified configuration parameter in the onconfig file.	The DBA user must have write permission for the directory that contains the onconfig file.
-wm	Dynamically sets the value of the specified configuration parameter in memory.	The specified `value` is not preserved when the server is restarted.
`config_param`=`value`	Specifies the configuration parameter and its new value.	See Database configuration parameters.

To see a list of configuration parameters that you can tune dynamically with an onmode -wm or -wf command, run the onstat -g cfg tunable command.

The onmode -wf and onmode -wm commands have equivalent SQL administration API functions.

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