Load state monitoring apparatus and load state monitoring method

• US 20060150191A1
• Filed: 02/22/2005
• Published: 07/06/2006
• Est. Priority Date: 12/22/2004
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Masuda, Mineyoshi, Tarui, Toshiaki, Egi, Masashi
• Granted Patent: US 8,046,769 B2
• Time in Patent Office: Days
• US Class Current: 718/105
• CPC Class Codes: G06F 11/3409 for performance assessment
• CPC Class Codes: G06F 11/3433 for load management allocation of a server based on load conditions G06F9/505; load rebalancing G06F9/5083; redistributing the load in a network by a load balancer H04L67/1029
• CPC Class Codes: G06F 11/3495 for systems
• CPC Class Codes: G06F 2201/81 Threshold
• CPC Class Codes: G06F 2201/88 Monitoring involving counting

Abstract

A symptom state shifting from a low load state to a high load state is detected.

A measured value collection unit 131 stores measured values of a queue length measured by a queue length measurement unit 31 of each server 3, into a measured value storage unit 14. A fluctuation calculation unit 132 calculates a fluctuation of measured values that have been measured in a given time for each server. A symptom state judgment unit 133 compares the calculated fluctuation with a threshold to judge whether the server 3 for which the fluctuation has been calculated is in the symptom state or the high load state.

Claims

1. A load monitoring apparatus for monitoring a load state of an information processing apparatus, comprising:

a measured value storing means which stores both measured value and measurement time of performance information of said information processing apparatus;

a fluctuation calculation means which reads a plurality of measured values measured in a given time from the measured value storing means, and calculates a fluctuation of said plurality of measured values; and

a load state judgment means which compares the fluctuation calculated by the fluctuation calculation means with a given load state judgment threshold, to judge the load state of said information processing apparatus.

2. A load monitoring apparatus according to claim 1, wherein:

said fluctuation calculation means calculates, as the fluctuation, a higher moment of a plurality of measured values that have been measured in the given time.

3. A load monitoring apparatus according to claim 1, wherein:

said fluctuation calculation means calculates, as the fluctuation, a number of measured values that are larger than or equal to a given fluctuation judgment threshold out of said plurality of measured values measured in the given time.

4. A load monitoring apparatus according to claim 1, wherein:

said fluctuation calculation means reads said plurality of measured values measured in the given time and the measurement times paired with the respective measured values from the measured value storing means, transforms said plurality of measured values and the measurement times paired with the respective measured values into a frequency spectrum, detects all frequency component having an amplitude larger than or equal to a fluctuation judgment threshold, and obtains a group of detected frequency components as the fluctuation; and

said load state judgment means judges the load state of the information processing apparatus by examining whether there is a frequency component whose frequency is larger than or equal to said load state judgment threshold, among the frequency components included in said fluctuation obtained by said fluctuation calculation means.

5. A load monitoring apparatus according to claim 1, wherein

said performance information is a queue length indicating a number of requests held in a queue of said information processing apparatus.

6. A load monitoring apparatus according to claim 1, wherein:

said performance information is a response time for a request processed by said information processing apparatus.

7. A load monitoring apparatus according to claim 1, further comprising:

a configuration information storing means, which stores configuration information of said information processing apparatus; and

a threshold calculation means, which calculates said load state judgment threshold corresponding to performance of the information processing apparatus, based on the configuration information (which is stored in said configuration information storing means) of said information processing apparatus.

8. A load monitoring apparatus according to claim 1, further comprising:

a measured value collection means, which receives measured value information including a measured value of the performance information and a measurement time, and stores the received measured value information in said measured value storing means.

9. A load monitoring apparatus according to claim 1, wherein:

said load monitoring apparatus judges a load state of each of a plurality of information processing apparatuses;

for each information processing apparatus, said measured value storing means stores both measured value and measurement time of the performance information of that information processing apparatus;

for each information processing apparatus, said fluctuation calculation means reads a plurality of measured values measured in the given time for that information processing apparatus from the measured value storing means, and calculates a fluctuation of said plurality of measured values; and

for each information processing apparatus, said load state judgment means compares the fluctuation calculated for that information processing apparatus by said fluctuation calculation means with a load state judgment threshold that is determined according to performance of that information processing apparatus, to judge the load state of the information processing apparatus in question.

10. A load monitoring method in which a load monitoring apparatus monitors a load state of an information processing apparatus, comprising steps of:

receiving measured value information including a measured value of performance and a measurement time from said information processing apparatus, to store the received measured value information in a storage unit;

reading a plurality of measured values measured in a given time from said storage unit, to calculate a fluctuation of said plurality of measured values; and

comparing the calculated fluctuation with a given load state judgment threshold, to judge a load sate of said information processing apparatus.

11. A computer-readable program for monitoring a state of a load state of an information processing apparatus, wherein said program makes a computer functions as:

a measured value storing means, which stores both measured value and measurement time of performance information of said information processing apparatus;

a fluctuation calculation means, which reads a plurality of measured values measured in a given time from the measured value storing means, and calculates a fluctuation of said plurality of measured values; and

a load state judgment means, which compares the fluctuation calculated by the fluctuation calculation means with a given load state judgment threshold, to judge the load state of said information processing apparatus.