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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 GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Disk, memory, and process management
Shared memoryThese topics describe the content of database server shared memory, the factors that determine the sizes of shared-memory areas, and how data moves into and out of shared memory.
Virtual portion of shared memoryThe virtual portion of shared memory is expandable by the database server and can be paged out to disk by the operating system.
Components of the virtual portion of shared memoryThe virtual portion of shared memory stores a variety of data.
Session dataWhen a client application requests a connection to the database server, the database server begins a session with the client and creates a data structure for the session in shared memory. The created data structure is called the session-control block.

Session data

When a client application requests a connection to the database server, the database server begins a session with the client and creates a data structure for the session in shared memory. The created data structure is called the session-control block.

The session-control block stores the session ID, the user ID, the process ID of the client, the name of the host computer, and various status flags.

The database server allocates memory for session data as necessary.

You can impose restrictions on the memory allocated for sessions by setting the SESSION_LIMIT_MEMORY configuration parameter to specify the maximum amount of memory that a session can allocate. The limits do not apply to a user who holds administrative privileges, such as user informix or a DBSA user.