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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.
Performance GuideThe HCL OneDB™ Performance Guide describes how to configure and operate your HCL OneDB™ database server to improve overall system throughput and to improve the performance of SQL queries.
Effect of configuration on memory utilizationThe combination of operating-system and HCL OneDB™ configuration parameters can affect memory utilization.
Shared memoryYou must configure adequate shared-memory resources for the database server in your operating system. Insufficient shared memory can adversely affect performance.
Estimating the size of the message portion of shared memoryYou can estimate the size of the message portion of shared memory in kilobytes.

Estimating the size of the message portion of shared memory

You can estimate the size of the message portion of shared memory in kilobytes.

About this task

Estimate the size of the message portion of shared memory, using the following formula:

msegsize = (10,531 * ipcshm_conn + 50,000)/1024

ipcshm_conn: is the number of connections that can be made using the shared-memory interface, as determined by the NETTYPE parameter for the ipcshm protocol.

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