RETRIEVAL CONTROL METHOD, AND RETRIEVAL CONTROL DEVICE

摘要

A non-transitory computer-readable recording medium stores therein a retrieving control program that causes a computer to execute a process including, receiving a retrieval request including range information; estimating a number of records to be obtained by performing retrieval in a retrieval range; calculating a difference between a cost of retrieval processing time when retrieval processing is performed by a first process or thread which performs the retrieval processing for a record of the total number of records, and the cost of retrieval processing time when retrieval processing is performed by parallel retrieval; calculating a cost of time for giving a record of the estimated number of records from a plurality of processes or threads to the first process or thread; and controlling, according to a comparison result between the difference and the calculated cost of the time, whether the retrieval request is to be processed by the parallel retrieval.

主权项

1. A non-transitory computer-readable recording medium having stored therein a retrieving control program that causes a computer to execute a process comprising:
receiving a retrieval request including range information that designates a retrieval range of the retrieval request; specifying a total number of records included in the retrieval range designated by the range information, and estimating the number of records to be obtained by performing retrieval in the retrieval range, by utilizing a correspondence relation information stored in a storage unit, the correspondence relation information including relationships between the retrieval range and the total number of records included in the retrieval range; calculating a difference between a cost of retrieval processing time and a cost of retrieval processing time, the cost of retrieval processing time being calculated on a condition when retrieval processing is performed by a first process or thread which performs the retrieval processing for a record of the total number of records, and the cost of retrieval processing time being calculated on a condition when retrieval processing is performed by parallel retrieval using a plurality of processes or threads controlled by the first process or thread; calculating a cost of time for giving a record of the estimated number of records from the plurality of processes or threads to the first process or thread; and controlling, according to a comparison result between the difference and the calculated cost of the time, whether the retrieval request is to be processed by the parallel retrieval.