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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.
Database server thread access to shared buffersDatabase server threads access shared buffers through a system of queues, using mutexes and locks to synchronize access and protect data.
Database server thread access to buffer pagesThe database server uses shared-lock buffering to allow more than one database server thread to access the same buffer concurrently in shared memory.

Database server thread access to buffer pages

The database server uses shared-lock buffering to allow more than one database server thread to access the same buffer concurrently in shared memory.

The database server uses two types of buffer locks to provide this concurrency without a loss in thread isolation. The two types of lock access are share and exclusive. (For more information, see Types of buffer locks.)