What does negative value of -1 in kB_rd/ and kB_wr/s mean in PIDSTAT command

Question

This is a sample output from running pidstat.

minflt/s majflt/s   VSZ          RSS    %MEM    kB_rd/s kB_wr/s kB_ccwr/s

49     0          217532      18784   0.01    -1      -1      -1

Can you please tell me how to manipulate the values in terms of high values, low values, zero values and -ve values. Alteast some direction of where to find will be of great help.

Thanks in advance.

score 1 · Answer 1 · answered Aug 01 '13 at 10:21

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I have it confirmed that the values cannot be -1. But if you get a -1 value it simple means the corresponding setting is missing from the setting file in config under boot dir.

answered Aug 01 '13 at 10:21

Subiah R Nagarajan

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score 1 · Answer 2 · edited Dec 03 '15 at 15:42

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Only root can access disk statistics for processes that they do not own. Try to execute pidstat with sudo.

edited Dec 03 '15 at 15:42

Dave M

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answered Dec 03 '15 at 15:36

carlos

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What does negative value of -1 in kB_rd/ and kB_wr/s mean in PIDSTAT command

2 Answers2