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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.
Shared-memory internal tablesThe database server shared memory contains seven internal tables that track shared-memory resources.
Page-cleaner tableThe page-cleaner table tracks the state and location of each of the page-cleaner threads.

Page-cleaner table

The page-cleaner table tracks the state and location of each of the page-cleaner threads.

The number of page-cleaner threads is specified by the CLEANERS configuration parameter in the onconfig file. For advice on how many page-cleaner threads to specify, see the chapter on configuration parameters in the HCL OneDB™ Administrator's Reference.

The page-cleaner table always contains 128 entries, regardless of the number of page-cleaner threads specified by the CLEANERS parameter in the onconfig file.

For information about monitoring the activity of page-cleaner threads, see information about the onstat -F option in the HCL OneDB Administrator's Reference.