System and method for triggering software rejuvenation using a customer affecting performance metric

1. A computer-implemented method for triggering a software rejuvenation system and/or method comprising:

receiving a plurality of requests for resources;

determining to take a sample of the requests with a probability;

determining an estimated average response time to the sample of the requests for resources;

determining that the estimated average response time is greater than a first threshold, wherein the first threshold is a mean of an assumed value;

determining that a number of estimated average response times greater than the first threshold is greater than or equal to a second threshold; and

triggering the software rejuvenation system and/or method.

2. The computer-implemented method of claim 1 , further comprising reducing or increasing the probability according to a function.

3. The computer-implemented method of claim 2 , wherein reducing or increasing the probability directly affects a frequency with which the sample of the requests for resources is taken.

4. The computer-implemented method of claim 1 , wherein the first threshold varies according to a number of estimated response times greater than the first threshold.

5. The computer-implemented method of claim 4 , further comprising increasing the first threshold when the number of response times is greater than the first threshold.

6. The computer-implemented method of claim 1 , wherein the second threshold is a positive integer.

7. The computer-implemented method of claim 1 , further comprising determining the assumed value based on a set of previous observations.

8. The computer-implemented method of claim 1 , wherein the probability is fixed.

9. The computer-implemented method of claim 1 , wherein the probability is determined by a function.

10. A computer-implemented method for triggering a software rejuvenation system and/or method comprising:

receiving a plurality of requests for resources;

determining to take a sample of the requests with a probability;

determining an average response time to the requests for resources corresponding to the sample of the requests;

increasing a number of response times greater than a first threshold upon determining that the response time is greater than the first threshold;

decreasing the number of response times greater than the first threshold upon determining that the response time is less than the first threshold;

determining that the number of response times greater than the first threshold is greater than or equal to a second threshold; and

triggering the software rejuvenation system and/or method.

11. The computer-implemented method of claim 10 , further comprising reducing or increasing the probability of taking the sample according to a function.

12. The computer-implemented method of claim 10 , wherein the first threshold varies according to a number of estimated response times greater than the first threshold.

13. The computer-implemented method of claim 12 , further comprising increasing the first threshold with the number of response times greater than the first threshold.

14. The computer-implemented method of claim 10 , wherein the second threshold is a positive integer.

15. The computer-implemented method of claim 10 , wherein the probability is fixed.

16. The computer-implemented method of claim 10 , wherein the probability is determined by a function.

17. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for triggering a software rejuvenation system and/or method, the method steps comprising:

receiving a plurality of requests for resources;

determining to take a sample of the requests with a probability;

determining an estimated average response time to the sample of the requests for resources;

determining that the estimated average response time is greater than a first threshold, wherein the first threshold is a mean of an assumed value;

determining that a number of estimated average response times greater than the first threshold is greater than or equal to a second threshold;

varying the probability of taking the sample with previously sampled values according to a value of the first threshold; and

triggering the software rejuvenation system and/or method.