AIX 7.2 Topas show high CPUFile to access for CPU load average on AIXDiagnose high swap usage on AIXAIX cluster show swing filesystemsAIX CPU usage - how to know how many CPUs running?AIX: show video cardShow AIX operator panel statusCpu and memory utilization is high in AixAIX show package contentCalculate LPAR CPU utilization (AIX)sudo on AIX 7.2
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AIX 7.2 Topas show high CPU
File to access for CPU load average on AIXDiagnose high swap usage on AIXAIX cluster show swing filesystemsAIX CPU usage - how to know how many CPUs running?AIX: show video cardShow AIX operator panel statusCpu and memory utilization is high in AixAIX show package contentCalculate LPAR CPU utilization (AIX)sudo on AIX 7.2
When I execute topas for a certain process, in the CPU% column it shows me 43% and jumping to 85%.
When I execute:
"ps aux | grep processName"
The same process is at 5%.
What is more accurate? I also made a loop that similar to the Linux "watch" command, and I see it's at %5.
What's the difference between topas and ps, and who is right?
Output of ps:
[ttfai231:root]/root>ps aux | head -1; ps aux | sort -rn +2 | head -10
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9306548 8.6 1.0 12880 12880 - A 13:35:33 41:20 MYDAEMON
root 1048868 2.0 0.0 448 448 - A 13:22:36 11:50 wait
Topas:
cpu aix ps
edited yesterday
Jeff Schaller♦
44.6k1162144
asked 2 days ago
ilanschilansch
1581114
add a comment |
When I execute topas for a certain process, in the CPU% column it shows me 43% and jumping to 85%.
When I execute:
"ps aux | grep processName"
The same process is at 5%.
What is more accurate? I also made a loop that similar to the Linux "watch" command, and I see it's at %5.
What's the difference between topas and ps, and who is right?
Output of ps:
[ttfai231:root]/root>ps aux | head -1; ps aux | sort -rn +2 | head -10
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9306548 8.6 1.0 12880 12880 - A 13:35:33 41:20 MYDAEMON
root 1048868 2.0 0.0 448 448 - A 13:22:36 11:50 wait
Topas:
cpu aix ps
edited yesterday
Jeff Schaller♦
44.6k1162144
asked 2 days ago
ilanschilansch
1581114
add a comment |
When I execute topas for a certain process, in the CPU% column it shows me 43% and jumping to 85%.
When I execute:
"ps aux | grep processName"
The same process is at 5%.
What is more accurate? I also made a loop that similar to the Linux "watch" command, and I see it's at %5.
What's the difference between topas and ps, and who is right?
Output of ps:
[ttfai231:root]/root>ps aux | head -1; ps aux | sort -rn +2 | head -10
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9306548 8.6 1.0 12880 12880 - A 13:35:33 41:20 MYDAEMON
root 1048868 2.0 0.0 448 448 - A 13:22:36 11:50 wait
Topas:
cpu aix ps
edited yesterday
Jeff Schaller♦
44.6k1162144
asked 2 days ago
ilanschilansch
1581114
When I execute topas for a certain process, in the CPU% column it shows me 43% and jumping to 85%.
When I execute:
"ps aux | grep processName"
The same process is at 5%.
What is more accurate? I also made a loop that similar to the Linux "watch" command, and I see it's at %5.
What's the difference between topas and ps, and who is right?
Output of ps:
[ttfai231:root]/root>ps aux | head -1; ps aux | sort -rn +2 | head -10
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9306548 8.6 1.0 12880 12880 - A 13:35:33 41:20 MYDAEMON
root 1048868 2.0 0.0 448 448 - A 13:22:36 11:50 wait
Topas:
cpu aix ps
cpu aix ps
edited yesterday
Jeff Schaller♦
44.6k1162144
asked 2 days ago
ilanschilansch
1581114
edited yesterday
Jeff Schaller♦
44.6k1162144
asked 2 days ago
ilanschilansch
1581114
edited yesterday
Jeff Schaller♦
44.6k1162144
edited yesterday
Jeff Schaller♦
44.6k1162144
edited yesterday
Jeff Schaller♦
44.6k1162144
44.6k1162144
asked 2 days ago
ilanschilansch
1581114
asked 2 days ago
ilanschilansch
1581114
asked 2 days ago
ilanschilansch
1581114
1581114
add a comment |
add a comment |
1 Answer
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votes
I believe this is a difference in how each field is computed. For the topas field:
% CPU Utilization
The average processor use of the process over the monitoring interval. The first time a process is shown, this value is the average processor use over the lifetime of the process.
... while the ps field:
%CPU
(u and v flags) The percentage of time the process has used the CPU since the process started. This value is computed by dividing the time the process uses the CPU by the elapsed time of the process. In a multi-processor environment, the value is further divided by the number of available CPUs because several threads in the same process can run on different CPUs at the same time. (Because the time base over which this data is computed varies, the sum of all %CPU fields can exceed 100%.)
I've bolded the pieces of the description that highlight the difference.
The topas CPU% value will fluctuate as the processes uses more or less CPU time, so it will show the CPU usage over the most recent (presumably short) interval; the ps %CPU value will always be shown as the average over the lifetime of the process.
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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active
oldest
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active
oldest
votes
I believe this is a difference in how each field is computed. For the topas field:
% CPU Utilization
The average processor use of the process over the monitoring interval. The first time a process is shown, this value is the average processor use over the lifetime of the process.
... while the ps field:
%CPU
(u and v flags) The percentage of time the process has used the CPU since the process started. This value is computed by dividing the time the process uses the CPU by the elapsed time of the process. In a multi-processor environment, the value is further divided by the number of available CPUs because several threads in the same process can run on different CPUs at the same time. (Because the time base over which this data is computed varies, the sum of all %CPU fields can exceed 100%.)
I've bolded the pieces of the description that highlight the difference.
The topas CPU% value will fluctuate as the processes uses more or less CPU time, so it will show the CPU usage over the most recent (presumably short) interval; the ps %CPU value will always be shown as the average over the lifetime of the process.
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
add a comment |
I believe this is a difference in how each field is computed. For the topas field:
% CPU Utilization
The average processor use of the process over the monitoring interval. The first time a process is shown, this value is the average processor use over the lifetime of the process.
... while the ps field:
%CPU
(u and v flags) The percentage of time the process has used the CPU since the process started. This value is computed by dividing the time the process uses the CPU by the elapsed time of the process. In a multi-processor environment, the value is further divided by the number of available CPUs because several threads in the same process can run on different CPUs at the same time. (Because the time base over which this data is computed varies, the sum of all %CPU fields can exceed 100%.)
I've bolded the pieces of the description that highlight the difference.
The topas CPU% value will fluctuate as the processes uses more or less CPU time, so it will show the CPU usage over the most recent (presumably short) interval; the ps %CPU value will always be shown as the average over the lifetime of the process.
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
add a comment |
I believe this is a difference in how each field is computed. For the topas field:
% CPU Utilization
The average processor use of the process over the monitoring interval. The first time a process is shown, this value is the average processor use over the lifetime of the process.
... while the ps field:
%CPU
(u and v flags) The percentage of time the process has used the CPU since the process started. This value is computed by dividing the time the process uses the CPU by the elapsed time of the process. In a multi-processor environment, the value is further divided by the number of available CPUs because several threads in the same process can run on different CPUs at the same time. (Because the time base over which this data is computed varies, the sum of all %CPU fields can exceed 100%.)
I've bolded the pieces of the description that highlight the difference.
The topas CPU% value will fluctuate as the processes uses more or less CPU time, so it will show the CPU usage over the most recent (presumably short) interval; the ps %CPU value will always be shown as the average over the lifetime of the process.
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
I believe this is a difference in how each field is computed. For the topas field:
% CPU Utilization
The average processor use of the process over the monitoring interval. The first time a process is shown, this value is the average processor use over the lifetime of the process.
... while the ps field:
%CPU
(u and v flags) The percentage of time the process has used the CPU since the process started. This value is computed by dividing the time the process uses the CPU by the elapsed time of the process. In a multi-processor environment, the value is further divided by the number of available CPUs because several threads in the same process can run on different CPUs at the same time. (Because the time base over which this data is computed varies, the sum of all %CPU fields can exceed 100%.)
I've bolded the pieces of the description that highlight the difference.
The topas CPU% value will fluctuate as the processes uses more or less CPU time, so it will show the CPU usage over the most recent (presumably short) interval; the ps %CPU value will always be shown as the average over the lifetime of the process.
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
answered yesterday
Jeff Schaller♦Jeff Schaller
44.6k1162144
44.6k1162144
add a comment |
add a comment |
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