FAQ
Everyone,

I have two x86_64 servers with CentOS 6.3 that seem to have some
difficulty with the last version of bind :

32:bind-9.8.2-0.10.rc1.el6_3.2.x86_64

When I run htop I am getting a CPU usage of 70 to 80% all of the time.
I am not seeing problems identified in the log files on either machine.

This may have been present before the update of 9.8.2.0, but I certainly
did not notice it. Has anyone else had this problem.

Any solutions??

Greg Ennis

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  • Gregory P. Ennis at Aug 12, 2012 at 12:33 pm
    Aug 2012 16:32:51 -0500

    Everyone,

    I have two x86_64 servers with CentOS 6.3 that seem to have some
    difficulty with the last version of bind :

    32:bind-9.8.2-0.10.rc1.el6_3.2.x86_64

    When I run htop I am getting a CPU usage of 70 to 80% all of the time.
    I am not seeing problems identified in the log files on either machine.

    This may have been present before the update of 9.8.2.0, but I certainly
    did not notice it. Has anyone else had this problem.

    Any solutions??

    Greg Ennis
    -----------------------------------------------------------------------------

    I have continued to have problems with bind's consumption of CPU time.
    When I run "strace -p PID#" on the affected PID I get the following that
    is generated over and over. This is occurring on both machines. I am
    not sure what this means at this point. If any of you can offer
    assistance it would be greatly appreciated.

    Thanks,

    Greg

    futex(0x7ff2ae5e808c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7ff2ae5e8088, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
    futex(0x7ff2ae5e8028, FUTEX_WAKE_PRIVATE, 1) = 1
    futex(0x7ff2ae5e9028, FUTEX_WAKE_PRIVATE, 1) = 0
    futex(0x7ff2ae5e9078, FUTEX_WAKE_PRIVATE, 1) = 1
    futex(0x7ff2ae5e907c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1738218731, {1344789447, 283018000}, ffffffff) = -1 EAGAIN (Resource temporarily unavailable)
    gettimeofday({1344788651, 464093}, NULL) = 0
    futex(0x7ff2ae5e808c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7ff2ae5e8088, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
  • Gregory P. Ennis at Aug 12, 2012 at 1:40 pm
    Aug 2012 16:32:51 -0500

    Everyone,

    I have two x86_64 servers with CentOS 6.3 that seem to have some
    difficulty with the last version of bind :

    32:bind-9.8.2-0.10.rc1.el6_3.2.x86_64

    When I run htop I am getting a CPU usage of 70 to 80% all of the time.
    I am not seeing problems identified in the log files on either machine.

    This may have been present before the update of 9.8.2.0, but I certainly
    did not notice it. Has anyone else had this problem.

    Any solutions??

    Greg Ennis
    -----------------------------------------------------------------------------

    I have continued to have problems with bind's consumption of CPU time.
    When I run "strace -p PID#" on the affected PID I get the following that
    is generated over and over. This is occurring on both machines. I am
    not sure what this means at this point. If any of you can offer
    assistance it would be greatly appreciated.

    Thanks,

    Greg

    futex(0x7ff2ae5e808c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7ff2ae5e8088, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
    futex(0x7ff2ae5e8028, FUTEX_WAKE_PRIVATE, 1) = 1
    futex(0x7ff2ae5e9028, FUTEX_WAKE_PRIVATE, 1) = 0
    futex(0x7ff2ae5e9078, FUTEX_WAKE_PRIVATE, 1) = 1
    futex(0x7ff2ae5e907c, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1738218731, {1344789447, 283018000}, ffffffff) = -1 EAGAIN (Resource temporarily unavailable)
    gettimeofday({1344788651, 464093}, NULL) = 0
    futex(0x7ff2ae5e808c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7ff2ae5e8088, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1

    ----------------------------------------------------------------------------------------------------

    Here is the fix for anyone else having the same problem :

    Take a look at this link for some background info :
    https://bugzilla.redhat.com/show_bug.cgi?idp9205

    My problem was fixed by doing the following :

    chown -R named.named /var/named/chroot

    restorecon -R /var/named/chroot/

    Greg

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