Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-475

IO Wait and CPU 100% utilization with no workload

    XMLWordPrintableJSON

Details

    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • Icon: Major - P3 Major - P3
    • None
    • 1.1.4
    • Performance
    • None
    • Ubuntu 9.10 64bit

    Description

      Mongod is using 1 cpu core while doing absolutely nothing. There is nothing reading from , or writing to mongodb and yet 1 cpu core is at 100% (most of it is iowait)

      Fri Dec 11 10:11:07 connection accepted from 192.168.7.142:49806 #2
      Fri Dec 11 10:11:07 end connection 192.168.7.142:49806
      Fri Dec 11 10:12:07 connection accepted from 192.168.7.142:49811 #3
      Fri Dec 11 10:12:07 end connection 192.168.7.142:49811
      Fri Dec 11 10:13:08 connection accepted from 192.168.7.142:44181 #4
      Fri Dec 11 10:13:08 end connection 192.168.7.142:44181
      Fri Dec 11 10:14:07 connection accepted from 192.168.7.142:44183 #5
      Fri Dec 11 10:14:08 end connection 192.168.7.142:44183
      Fri Dec 11 10:15:07 connection accepted from 192.168.7.142:44185 #6
      Fri Dec 11 10:15:08 end connection 192.168.7.142:44185
      Fri Dec 11 10:16:08 connection accepted from 192.168.7.142:44187 #7
      Fri Dec 11 10:16:08 end connection 192.168.7.142:44187

      stracing the process gives:

      rt_sigreturn(0x16) = -1 EINTR (Interrupted system call)
      ioctl(6, SNDCTL_TMR_TIMEBASE or TCGETS,

      {B38400 opost isig -icanon -echo ...}

      ) = 0
      ioctl(6, SNDCTL_TMR_CONTINUE or TCSETSF,

      {B38400 opost isig icanon echo ...}

      ) = ? ERESTARTSYS (To be restarted)
      — SIGTTOU (Stopped (tty output)) @ 0 (0) —

      (the above output is constantly repeated)

      Killing the process and starting it again returned to normal idle usage

      Attachments

        Activity

          People

            eliot Eliot Horowitz (Inactive)
            bandito George Chatzigeorgiou
            Votes:
            0 Vote for this issue
            Watchers:
            0 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved: