INFORMATION SYSTEM, LOAD CONTROL METHOD, LOAD CONTROL PROGRAM AND RECORDING MEDIUM

• US 20090133031A1
• Filed: 01/09/2009
• Published: 05/21/2009
• Est. Priority Date: 10/29/2003
• Status: Active Grant

• Current Assignee: Kyndryl Incorporated
• Original Assignee: Masashi Inoue
• Inventors: Inoue, Masashi
• Granted Patent: US 8,386,611 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

A load control server, computer program product, and method for controlling bottlenecks in an information system that includes application servers and a database server. Each application server executes at least one application program for processing a transaction received by each application server. The database server accesses a database based on a request received from an application server. A processing time required for each application program to process the transaction is monitored. A bottleneck relating to usage of at least one resource is detected. Each resource is a resource of at least one application server, a resource related to input to the transaction, a resource of the database server, or a resource related to the transaction. The detecting responds to the monitoring determining that the processing time for processing the transaction by at least one application server is not within a predesignated permissible processing time range. The detected bottleneck is removed.

Claims

1. A load control server comprising a processor and a computer readable memory unit coupled to the processor, said memory unit containing program code configured to be executed by the processor to 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 application 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,

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.

2. The load control server of claim 1, 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

3. The load control server of claim 2, 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.

4. The load control server of claim 2, wherein said removing the detected bottleneck comprises eliminating the high load imposed on each resource of the at least one resource.

5. The load control server of claim 4, 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.

6. The load control server of claim 5, 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.

7. The load control server of claim 5, 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.

8. A computer program product, comprising a computer readable storage medium having a computer readable program code stored therein, said computer readable program code containing instructions configured to be executed by a processor of a computer system to 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 application 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,

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.

9. The computer program product of claim 8, 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

10. The computer program product of claim 9, 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.

11. The computer program product of claim 9, wherein said removing the detected bottleneck comprises eliminating the high load imposed on each resource of the at least one resource.

12. The computer program product of claim 11, 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.

13. The computer program product of claim 12, 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.

14. The computer program product of claim 12, 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.

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 application 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,

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.

16. The method of claim 15, 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

17. The method of claim 16, 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.

18. The method of claim 16, wherein said removing the detected bottleneck comprises eliminating the high load imposed on each resource of the at least one resource.

19. The method of claim 18, 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.

20. The method of claim 19, 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.