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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.
Communications portion of shared memory (UNIX™)The database server allocates memory for the IPC communication portion of shared memory if you configure at least one of your connections as an IPC shared-memory connection. The database server performs this allocation when you set up shared memory.

Communications portion of shared memory (UNIX)

The database server allocates memory for the IPC communication portion of shared memory if you configure at least one of your connections as an IPC shared-memory connection. The database server performs this allocation when you set up shared memory.

The communications portion contains the message buffers for local client applications that use shared memory to communicate with the database server.

The size of the communications portion of shared memory equals approximately 12 KB multiplied by the expected number of connections required for shared-memory communications (nettype ipcshm). If nettype ipcshm is not present, the expected number of connections defaults to 50. For information about how a client attaches to the communications portion of shared memory, see How a client attaches to the communications portion (UNIX).