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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.
EXTSHMADD configuration parameterUse the EXTSHMADD configuration parameter to specify the size of virtual-extension segments that are added when a user-defined routine or a DataBlade® routine is run in a user-defined virtual processor.

EXTSHMADD configuration parameter

Use the EXTSHMADD configuration parameter to specify the size of virtual-extension segments that are added when a user-defined routine or a DataBlade® routine is run in a user-defined virtual processor.

onconfig.std value: EXTSHMADD 8192
values: 32-bit operating systems: 1024 - 524288
64-bit operating systems: 1024 - 4294967296
units: KB
takes effect: After you edit your onconfig file and restart the database server.

Usage

When a thread is run in a user defined virtual processor, a virtual-extension segment is created. In the output of the onstat -g seg command, the virtual-extension segment has a class of VX. If the EXTSHMADD configuration parameter is not set in the onconfig file, the size of virtual-extension segments is set by the value of the SHMADD configuration parameter.

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