Home
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.
Configuration parameters that affect memory utilizationA large number of configuration parameters in the ONCONFIG file affect memory utilization and performance.
Setting the size of the buffer pool, logical-log buffer, and physical-log bufferThe values that you specify for the BUFFERPOOL, DS_TOTAL_MEMORY, LOGBUFF, and PHYSBUFF configuration parameters depend on the type of applications that you are using (OLTP or DSS) and the page size.
The LOGBUFF configuration parameter and memory utilizationThe LOGBUFF configuration parameter determines the amount of shared memory that is reserved for each of the three buffers that hold the logical-log records until they are flushed to the logical-log file on disk. The size of a buffer determines how often it fills and therefore how often it must be flushed to the logical-log file on disk.

The LOGBUFF configuration parameter and memory utilization

The LOGBUFF configuration parameter determines the amount of shared memory that is reserved for each of the three buffers that hold the logical-log records until they are flushed to the logical-log file on disk. The size of a buffer determines how often it fills and therefore how often it must be flushed to the logical-log file on disk.

If you log smart large objects, increase the size of the logical-log buffers to prevent frequent flushing to the logical-log file on disk.