Contents
- 1 What is the relation between CPU time and elapsed time?
- 2 What is the difference between real time and CPU time?
- 3 What is the difference between elapsed time and response time?
- 4 What does elapsed time on a mainframe mean?
- 5 What does the elapsed time of a job mean?
- 6 How to calculate CPU time for SQL Server?
What is the relation between CPU time and elapsed time?
CPU Time is the quantity of processor time taken by the process. This does not indicate duration. “Elapsed Time” represents the total duration of the task.
What is the difference between real time and CPU time?
Real Time is the actual, real world, time that the step takes to run and will be the same as if you timed it with a stopwatch (not possible as you won’t know the precise moment the step starts and stops). CPU Time is the amount of time the step utilises CPU resources.
What is the difference between elapsed time and response time?
Response Time – Time to get the response back from the server. Elapsed Time – Total Time including the Request Time + Response Time.
How do you estimate elapsed time?
To calculate elapsed time:
- Count on in minutes from the earlier time to the nearest hour.
- Count on in hours to the hour nearest to the later time.
- Count in minutes to reach the later time.
Which is more important CPU time or elapsed time?
SQL Server Execution Times: CPU time = 203 ms, elapsed time = 785 ms. The UDF has very lesser elapsed time than the direct sql and the view, however the CPU time is more. However the CPU time is less in the view when compared to direct SQL and UDF.
What does elapsed time on a mainframe mean?
Elapsed time represents the total amount of time the task has been around (Elapsed Time = Waiting time of the Job + CPU Time ) Under z/OS, there are typically hundreds of tasks running simultaneously on any given system.
What does the elapsed time of a job mean?
Elapsed time represents the total amount of time the task has been around. (Elapsed Time = Waiting time of the Job + CPU Time ) Under z/OS, there are typically hundreds of tasks running simultaneously on any given system. These include started tasks (which would include DB2, MQ series, Websphere, system tasks), TSO users, batch jobs, CICS regions.
How to calculate CPU time for SQL Server?
SQL Server Execution Times: CPU time = 15 ms, elapsed time = 5853 ms. Scan count 1, logical reads 1338, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.