Information system, load control method, load control program and recording medium

• US 20070157210A1
• Filed: 10/27/2004
• Published: 07/05/2007
• Est. Priority Date: 10/29/2003
• Status: Active Grant

• Current Assignee: Kyndryl Incorporated
• Original Assignee: International Business Machines Corporation
• Inventors: Inoue, Masashi
• Granted Patent: US 7,480,719 B2
• Time in Patent Office: Days
• US Class Current: 718/105
• CPC Class Codes: G06F 2209/482 Application
• CPC Class Codes: G06F 9/485 Task life-cycle, e.g. stopping, restarting, resuming execution G06F9/4881 takes precedence
• CPC Class Codes: H04L 41/5009 Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
• CPC Class Codes: H04L 41/5019 Ensuring fulfilment of SLA
• CPC Class Codes: H04L 41/5096 wherein the managed service relates to distributed or central networked applications
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: Y10S 707/99932 Access augmentation or optimizing
• CPC Class Codes: Y10S 707/99953 Recoverability

Abstract

One objective of the present invention is to provide appropriate load control in accordance with processing times required for transactions, on individual application servers, in an information system that includes a plurality of application servers and a database server. The present invention provides an information system that includes: a process time monitoring unit, for monitoring processing time required for the application program to process a transaction received by an application server; a bottleneck identification unit, for identifying, based on monitoring results of processing time, a bottleneck in at least one of the plurality of application servers if the processing time is not within a predesignated permissible range; and a load controller, for reducing a multiplicity of the application program on an application server identified as having a bottleneck.

Claims

1-14. -14. (canceled)

15. A method for controlling bottlenecks in an information system that includes N application servers and a database server, wherein N is at least 2, wherein each application server is adapted to execute at least one application program for processing a transaction received by each application server from a terminal, wherein the database server is adapted to access a database based on a request received from any application server of the N application servers, and wherein the method comprises:

monitoring a processing time required for each application program to process the transaction received by each application server;

detecting a bottleneck relating to usage of at least one resource, wherein each resource of the at least one resource is independently selected from the group consisting of a resource of at least one application server of the N application servers, a resource related to input to the transaction, a resource of the database server, and a resource related to the transaction, wherein said detecting is responsive to said monitoring having determined that the processing time for processing the transaction by I appplication servers of the N application servers is not within a predesignated permissible processing time range, and wherein I is at least 1; and

removing the detected bottleneck.

16. The method of claim 15, wherein M denotes a predesignated threshold number of application servers, wherein said detecting the bottleneck relating to usage of at least one resource comprises identifying the at least one resource, and wherein said identifying the at least one resource comprises independently identifying each resource of the at least one resource as being:

said resource of at least one application server of the N application servers if I is at least 1 and does not exceed M and if a processing time for processing another type of transaction by any application server of the N application servers is not within the predesignated permissible processing time range;

said resource related to input to the transaction if I is at least 1 and does not exceed M and if a processing time for processing another type of transaction by any application server of the N application servers is within the predesignated permissible processing time range;

said resource of the database server if I exceeds M and if a processing time for processing another type of transaction by any application server of the N application servers is not within the predesignated permissible processing time range;

said resource related to the transaction if I exceeds M and if a processing time for processing another type of transaction by any application server of the N application servers is within the predesignated permissible processing time range.

17. The method of claim 16, wherein the method further comprises monitoring processing loads imposed on:

resources of the N application servers, resources of the database server, and resources related to the transaction, and wherein said identifying each resource of the at least one resource comprises determining from the monitored processing loads that a high load specific to each resource of the at least one resource is imposed on each resource of the at least one resource

18. The method of claim 17, wherein said determining that a high load is imposed on each resource of the at least one resource comprises determining that a predesignated detection condition has occurred for each resource of the at least one resource a predesignated number of times, and wherein the predesignated detection condition is that a predesignated usage parameter specific to each resource of the at least one resource is in a predesignated load range.

19. The method of claim 17, wherein said removing the detected bottleneck comprises eliminating the high load imposed on each resource of the at least one resource.

20. The method of claim 19, wherein said eliminating comprises executing in a predesignated sequence specific to each resource of the at least one resource as many of one or more predesignated load control processes as is necessary to eliminate the high load imposed on each resource of the at least one resource.

21. The method of claim 20, wherein a first resource of the at least one resource is a resource of a first application server of the N application servers, wherein said executing the predesignated sequence specific to the first resource comprises reducing an application program multiplicity of the first application server, and wherein said application program multiplicity on the first application server is defined as a maximum number of application programs to be executed concurrently on the first application server with respect to a plurality of transactions of the same type that were received by the first application server at the same time.

22. The method of claim 20, wherein a first resource of the at least one resource is a resource of the database server, and wherein said executing the predesignated sequence specific to the first resource comprises reducing a priority level of a process for accessing the database.

23. The method of claim 15, wherein an upper limiting processing time of the predesignated permissible processing time range is one standard deviation higher than an average processing time per transaction processed during peak processing loads during a predesignated period of time.

24. A load control server that performs a method for controlling bottlenecks in an information system that includes N application servers and a database server, wherein N is at least 2, wherein each application server is adapted to execute at least one application program for processing a transaction received by each application server from a terminal, wherein the database server is adapted to access a database based on a request received from any application server of the N application servers, wherein the load control server comprises a process time monitoring unit, a bottleneck identification unit, and a load controller, and wherein the method comprises:

monitoring, by the process time monitoring unit, a processing time required for each application program to process the transaction received by each application server;

detecting, by the bottleneck identification unit, a bottleneck relating to usage of at least one resource, wherein each resource of the at least one resource is independently selected from the group consisting of a resource of at least one application server of the N application servers, a resource related to input to the transaction, a resource of the database server, and a resource related to the transaction, wherein said detecting is responsive to said monitoring having determined that the processing time for processing the transaction by I appplication servers of the N application servers is not within a predesignated permissible processing time range, and wherein I is at least 1; and

removing, by the load controller, the detected bottleneck.

25. The load control server of claim 24, wherein M denotes a predesignated threshold number of application servers, wherein said detecting the bottleneck relating to usage of at least one resource comprises identifying the at least one resource, and wherein said identifying the at least one resource comprises independently identifying each resource of the at least one resource as being:

said resource of at least one application server of the N application servers if I is at least 1 and does not exceed M and if a processing time for processing another type of transaction by any application server of the N application servers is not within the predesignated permissible processing time range;

said resource related to input to the transaction if I is at least 1 and does not exceed M and if a processing time for processing another type of transaction by any application server of the N application servers is within the predesignated permissible processing time range;

said resource of the database server if I exceeds M and if a processing time for processing another type of transaction by any application server of the N application servers is not within the predesignated permissible processing time range;

said resource related to the transaction if I exceeds M and if a processing time for processing another type of transaction by any application server of the N application servers is within the predesignated permissible processing time range.

26. The load control server of claim 25, wherein the method further comprises monitoring processing loads imposed on:

resources of the N application servers, resources of the database server, and resources related to the transaction, and wherein said identifying each resource of the at least one resource comprises determining from the monitored processing loads that a high load specific to each resource of the at least one resource is imposed on each resource of the at least one resource

27. The load control server of claim 26, wherein said determining that a high load is imposed on each resource of the at least one resource comprises determining that a predesignated detection condition has occurred for each resource of the at least one resource a predesignated number of times, and wherein the predesignated detection condition is that a predesignated usage parameter specific to each resource of the at least one resource is in a predesignated load range.

28. The load control server of claim 26, wherein said removing the detected bottleneck comprises eliminating the high load imposed on each resource of the at least one resource.

29. The load control server of claim 28, wherein said eliminating comprises executing in a predesignated sequence specific to each resource of the at least one resource as many of one or more predesignated load control processes as is necessary to eliminate the high load imposed on each resource of the at least one resource.

30. The load control server of claim 29, wherein a first resource of the at least one resource is a resource of a first application server of the N application servers, wherein said executing the predesignated sequence specific to the first resource comprises reducing an application program multiplicity of the first application server, and wherein said application program multiplicity on the first application server is defined as a maximum number of application programs to be executed concurrently on the first application server with respect to a plurality of transactions of the same type that were received by the first application server at the same time.

31. The load control server of claim 29, wherein a first resource of the at least one resource is a resource of the database server, and wherein said executing the predesignated sequence specific to the first resource comprises reducing a priority level of a process for accessing the database.

32. A computer program product, comprising a computer usable medium having a computer readable program embodied therein, said computer readable program code containing instructions that when executed by a computer system implement a method for controlling bottlenecks in an information system that includes N application servers and a database server, wherein N is at least 2, wherein each application server is adapted to execute at least one application program for processing a transaction received by each application server from a terminal, wherein the database server is adapted to access a database based on a request received from any application server of the N application servers, and wherein the method comprises:

monitoring a processing time required for each application program to process the transaction received by each application server;

detecting a bottleneck relating to usage of at least one resource, wherein each resource of the at least one resource is independently selected from the group consisting of a resource of at least one application server of the N application servers, a resource related to input to the transaction, a resource of the database server, and a resource related to the transaction, wherein said detecting is responsive to said monitoring having determined that the processing time for processing the transaction by I appplication servers of the N application servers is not within a predesignated permissible processing time range, and wherein I is at least 1; and

removing the detected bottleneck.

33. The computer program product of claim 32, wherein M denotes a predesignated threshold number of application servers, wherein said detecting the bottleneck relating to usage of at least one resource comprises identifying the at least one resource, and wherein said identifying the at least one resource comprises independently identifying each resource of the at least one resource as being:

said resource of at least one application server of the N application servers if I is at least 1 and does not exceed M and if a processing time for processing another type of transaction by any application server of the N application servers is not within the predesignated permissible processing time range;

said resource related to input to the transaction if I is at least 1 and does not exceed M and if a processing time for processing another type of transaction by any application server of the N application servers is within the predesignated permissible processing time range;

said resource of the database server if I exceeds M and if a processing time for processing another type of transaction by any application server of the N application servers is not within the predesignated permissible processing time range;

said resource related to the transaction if I exceeds M and if a processing time for processing another type of transaction by any application server of the N application servers is within the predesignated permissible processing time range.

34. The computer program product of claim 33, wherein the method further comprises monitoring processing loads imposed on:

resources of the N application servers, resources of the database server, and resources related to the transaction, and wherein said identifying each resource of the at least one resource comprises determining from the monitored processing loads that a high load specific to each resource of the at least one resource is imposed on each resource of the at least one resource

35. The computer program product of claim 34, wherein said removing the detected bottleneck comprises eliminating the high load imposed on each resource of the at least one resource.

36. The computer program product of claim 35, wherein said eliminating comprises executing in a predesignated sequence specific to each resource of the at least one resource as many of one or more predesignated load control processes as is necessary to eliminate the high load imposed on each resource of the at least one resource.

37. The computer program product of claim 36, wherein a first resource of the at least one resource is a resource of a first application server of the N application servers, wherein said executing the predesignated sequence specific to the first resource comprises reducing an application program multiplicity of the first application server, and wherein said application program multiplicity on the first application server is defined as a maximum number of application programs to be executed concurrently on the first application server with respect to a plurality of transactions of the same type that were received by the first application server at the same time.

38. The computer program product of claim 36, wherein a first resource of the at least one resource is a resource of the database server, and wherein said executing the predesignated sequence specific to the first resource comprises reducing a priority level of a process for accessing the database.