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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 OneDB™ database servers.
Administrator's ReferenceThe HCL OneDB™ Administrator's Reference includes comprehensive descriptions of HCL OneDB™ 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 HCL OneDB™
Database configuration parametersThe HCL OneDB™ 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.
EXT_DIRECTIVES configuration parameterUse the EXT_DIRECTIVES configuration parameter to enable or disable the use of external query optimizer directives.

EXT_DIRECTIVES configuration parameter

Use the EXT_DIRECTIVES configuration parameter to enable or disable the use of external query optimizer directives.

onconfig.std value

EXT_DIRECTIVES 0

values

0 (default) = Off. The directive cannot be enabled even if IFX_EXTDIRECTIVES is on.

1 = On. The directive can be enabled for a session if IFX_EXTDIRECTIVES is on.

2 = On. The directive can be used even if IFX_EXTDIRECTIVES is not set.

takes effect

After you edit your onconfig file and restart the database server.

Usage

Enable external directives by using the EXT_DIRECTIVES configuration parameter in combination with the client-side IFX_EXTDIRECTIVES environment variable as follows:

The setting of the IFX_EXTDIRECTIVES environment variable overrides the setting of the EXT_DIRECTIVES configuration parameter. If you do not set the IFX_EXTDIRECTIVES environment variable, all sessions for a client inherit the database server configuration for processing external directives.

The setting specified by the SET ENVIRONMENT EXTDIRECTIVES statement of SQL overrides (for the current user session only) the settings of both the IFX_EXTDIRECTIVES environment variable and of the EXT_DIRECTIVES configuration parameter.

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