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I am running top to try and see what is going on on one of our servers, the % cpu is regularly going over 100%. What does this mean? Code: ...
  1. 01-27-2009 #1
    elija
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    RHEL top command

    I am running top to try and see what is going on on one of our servers, the % cpu is regularly going over 100%. What does this mean?

    Code:
    top - 12:23:02 up 46 days, 19:56,  3 users,  load average: 0.64, 0.88, 1.04
Tasks: 133 total,   2 running, 131 sleeping,   0 stopped,   0 zombie
Cpu(s): 33.7% us,  6.8% sy,  0.0% ni, 59.0% id,  0.3% wa,  0.1% hi,  0.0% si
Mem:   4149120k total,  4010472k used,   138648k free,    38684k buffers
Swap:  9614860k total,      908k used,  9613952k free,  2348836k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
28443 mysql     15   0 2014m 1.4g 4988 S  161 35.2  10494:10 mysqld
23476 root      16   0  3940  984  764 R    0  0.0   0:00.14 top
23486 root      16   0 12004 4196 3064 S    0  0.1   0:00.01 sagaZoneMinutel
    1 root      16   0  3428  548  468 S    0  0.0   0:05.03 init
    2 root      RT   0     0    0    0 S    0  0.0   0:00.45 migration/0
    3 root      34  19     0    0    0 S    0  0.0   0:26.99 ksoftirqd/0
    4 root      RT   0     0    0    0 S    0  0.0   0:00.34 migration/1
    5 root      34  19     0    0    0 S    0  0.0   0:01.91 ksoftirqd/1
    6 root      RT   0     0    0    0 S    0  0.0   0:00.32 migration/2
    7 root      34  19     0    0    0 S    0  0.0   0:04.77 ksoftirqd/2
    8 root      RT   0     0    0    0 S    0  0.0   0:00.29 migration/3
    9 root      34  19     0    0    0 S    0  0.0   0:25.03 ksoftirqd/3
   10 root       5 -10     0    0    0 S    0  0.0   0:00.06 events/0
   11 root       5 -10     0    0    0 S    0  0.0   0:00.01 events/1
   12 root       5 -10     0    0    0 S    0  0.0   0:00.03 events/2
   13 root       5 -10     0    0    0 S    0  0.0   0:00.00 events/3
   14 root      11 -10     0    0    0 S    0  0.0   0:00.00 khelper
    Another question is if I cat /proc/cpuinfo does that give an entry per core or per physical processor?

    Thanks
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  2. 01-27-2009 #2
    elija
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    OK, Got the first one. By default top uses something irix mode which sums the % of each core. Pressing 'I' turns this off and gives sensible results
    If we hit that bullseye, the rest of the dominoes will fall like a house of cards. Checkmate! (Zapp Brannigan)


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  3. 01-27-2009 #3
    coopstah13
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    it gives an entry per core/threading unit (if xeon with hyperthreading)
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  4. 01-27-2009 #4
    elija
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    Quote Originally Posted by coopstah13 View Post
    it gives an entry per core/threading unit (if xeon with hyperthreading)
    That's what I thought but I couldn't confirm it absolutely. Thanks
    If we hit that bullseye, the rest of the dominoes will fall like a house of cards. Checkmate! (Zapp Brannigan)


    My new blog. It's probably not as good as I think it is.
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