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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.
Table performance considerationsSome performance issues are associated with unfragmented tables and table fragments.
Managing sbspacesAn sbspace is a logical storage unit composed of one or more chunks that store smart large objects. You can estimate the amount of storage needed for smart large objects, improve metadata I/O, monitor sbspaces, and change storage characteristics.
Monitoring sbspacesYou can monitor the effectiveness of I/O operations on smart large objects. For better I/O performance, all smart large objects should be allocated in one extent to be contiguous.

Monitoring sbspaces

You can monitor the effectiveness of I/O operations on smart large objects. For better I/O performance, all smart large objects should be allocated in one extent to be contiguous.

For more information about sizing extents, see Sbspace extents.

Contiguity provides the following I/O performance benefits:

Minimizes the disk-arm motion
Requires fewer I/O operations to read the smart large object
When doing large sequential reads, can take advantage of lightweight I/O, which reads in larger blocks of data (60 kilobytes or more, depending on your platform) in a single I/O operation

You can use the following command-line utilities to monitor the effectiveness of I/O operations on smart large objects:

oncheck -cS, -pe and -pS
onstat -g smb s option

The following sections describe how to use these utility options to monitor sbspaces.