TY  - BOOK
AU  - Orachorn Punyajaray
AU  - Niem,Lechi
AU  - Huynh,Ngoc Phien
AU  - Venkatachalam,Paruvachi A.
AU  - Gonzales,JrR.L.
TI  - Performance and transaction cost variations of SQL/DS data base against selected parameters
T2  - Thesis
PY  - 1987///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Data base management
N1  - A thesis submitter in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology; Thesis (M.Sc.) - Asian Institute of Technology, 1987
N2  - Buffer sizes, the storage and access methods used, cardinality of  target tables, and some VM/SP system load indicators were shown to affect  the performance of SQL/DS data base and their effects were quantified.  Use of appropriate page buffer size and clustering index drastically reduced the CPU time and I/O requirements in retrieval transactions.  Regular setting of appropriate page buffer size in order to conserve  computer resources and the use the page hit ratio as the parameter to be  monitored in order to determine proper page buffer size is recommended.  In data base operations involving heavy retrieval transactions from  DBSPACEs containing multiple tables, the use of clustering index is re commended to realize savings in computer resources even with the extra  DASD space required for the indexes and the inconvenience in creating  them.  For certain storage/ access cases transaction cost models based on  number of pages referenced and cardinality are shown to be in agreement  with SQL/DS cost estimate. SQL/DS cost estimate is shown to be a linear  function of cardinality in certain storage/access cases.  Indexing has minimal effect in reducing transaction cost when the  table accessed resides in single-table DBSPACE. Cost reduction is effected when tables have clustering index in multiple-table DBSPACE
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B19174
ER  -