Index selection in a multi-system database management system
First Claim
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1. A system, comprising:
- a multi-system database management system that includes a plurality of database systems with different configurations from each other, and wherein each of the database systems can process data independently by using one or more processors, wherein each of the different configurations at least includes a number of database nodes and a number of access modules in each database node; and
an index selection subsystem that includes one or more processors operable to;
combine sets of query information from each one of the plurality of database systems into a workload that includes merged query information of the plurality of database systems;
generate, from the workload, one or more candidate indexes for each one of the plurality of the database systems; and
select one or more recommended indexes from the candidate indexes for each one of the plurality of database systems at least partly based on the configuration of each one of the plurality of database systems, wherein the recommended indexes comprise a first recommended index for a first copy of a given table in the first of the plurality of database systems, and a second recommended index for a second copy of the given table in the second of the plurality of database systems.
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Abstract
A system includes a multi-system database management system having a plurality of database systems. An index selection subsystem combines sets of query information from respective ones of the plurality of database systems into a workload. The index selection subsystem then generates candidate indexes from the workload, and selects recommended indexes from the candidate indexes based on one or more criteria.
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Citations
19 Claims
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1. A system, comprising:
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a multi-system database management system that includes a plurality of database systems with different configurations from each other, and wherein each of the database systems can process data independently by using one or more processors, wherein each of the different configurations at least includes a number of database nodes and a number of access modules in each database node; and an index selection subsystem that includes one or more processors operable to; combine sets of query information from each one of the plurality of database systems into a workload that includes merged query information of the plurality of database systems; generate, from the workload, one or more candidate indexes for each one of the plurality of the database systems; and select one or more recommended indexes from the candidate indexes for each one of the plurality of database systems at least partly based on the configuration of each one of the plurality of database systems, wherein the recommended indexes comprise a first recommended index for a first copy of a given table in the first of the plurality of database systems, and a second recommended index for a second copy of the given table in the second of the plurality of database systems. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method executed by a computer for use with a multi-system database management system that includes a plurality of database systems with different configurations from each other, wherein each of the database systems can process data independently by using one or more processors, wherein each of the different configurations at least includes a number of database nodes and a number of access modules in each database node, the method comprising:
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retrieving query information from each one the plurality of database systems of the multi-system database management system; combining the query information into a workload that includes merged query information of the plurality of database systems; generating, from the workload, one or more candidate indexes for each one of the plurality of the database systems; and selecting one or more recommended indexes from the candidate indexes for each one of the plurality of database systems at least partly based on the configuration of each one of the plurality of database systems, wherein the recommended indexes comprise a first recommended index for a first copy of a given table in the first of the plurality of database systems, and a second recommended index for a second copy of the given table in the second of the plurality of database systems. - View Dependent Claims (15, 16, 17, 18)
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19. A non-transitory computer readable storage medium storing at least executable code for a multi-system database management system that includes a plurality of database systems with different configurations from each other, wherein each of the database systems can process data independently by using one or more processors, wherein each of the different configurations at least includes a number of database nodes and a number of access modules in each database node, and wherein the executable code that when executed:
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retrieves query information from each one the plurality of database systems of the multi-system database management system; combines the query information into a workload that includes merged query information of the plurality of database systems; generates, from the workload, one or more candidate indexes for each one of the plurality of the database systems; and selects one or more recommended indexes from the candidate indexes for each one of the plurality of database systems at least partly based on the configuration of each one of the plurality of database systems, wherein the recommended indexes comprise a first recommended index for a first copy of a given table in the first of the plurality of database systems, and a second recommended index for a second copy of the given table in the second of the plurality of database systems.
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Specification