Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2006-03-21
2006-03-21
Corrielus, Jean M. (Department: 2162)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000
Reexamination Certificate
active
07016911
ABSTRACT:
Library management for libraries of user-defined routines in a database system. Libraries are stored in a long-term storage device and loaded into working memory in the database system when routines in the libraries are to be executed. An unload thread is defined to carry out the process of unloading libraries from the working memory when such libraries are inactive. The unload thread becomes active on a defined timing interval. The unload thread accesses a hash table and a most recently used list to determine which of the loaded libraries is inactive and which of the libraries ought to be unloaded. The hash table maintains information as to which libraries have been accessed in the most recent past defined timing interval. The size of the most recently used list can be defined such that all libraries associated with the list are retained in working memory.
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“Management of Multiple Shared Library Segments”, Technical Disclosure Bulletin, vol. 32, No. 5A, pp. 242-243, Oct. 1989.
Bousfield Melissa N.
Doole Douglas J.
McKeough Sean W.
Vincent Timothy J.
Wilson George M.
Corrielus Jean M.
International Business Machines - Corporation
Rogitz John L.
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