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Re: BDR, wal sender, high system cpu, mutex_lock_common

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Hi Craig,

Anyway, this OS is guess OS in vmware (vsphere).
Thank for your response and help. 

On Tue, Oct 3, 2017 at 8:49 PM, Craig Ringer <craig@xxxxxxxxxxxxxxx> wrote:

Can you get stacks please?

Use -g

# Events: 2K cpu-clock
#
# Overhead   Command      Shared Object                        Symbol
# ........  ........  .................  ............................
#
    86.96%  postgres  [kernel.kallsyms]  [k] __mutex_lock_common.isra.5
            |
            --- __mutex_lock_common.isra.5
                read

     2.85%  postgres  [kernel.kallsyms]  [k] do_raw_spin_lock
            |
            --- do_raw_spin_lock
               |
               |--90.48%-- read
               |
               |--8.33%-- recv
               |
                --1.19%-- write

     2.44%  postgres  [kernel.kallsyms]  [k] mutex_unlock
            |
            --- mutex_unlock
                read

     2.03%  postgres  [kernel.kallsyms]  [k] arch_local_irq_restore
            |
            --- arch_local_irq_restore
                read

     1.32%  postgres  postgres           [.] ValidXLogRecord
            |
            --- ValidXLogRecord

     1.25%  postgres  [kernel.kallsyms]  [k] mutex_lock
            |
            --- mutex_lock
                read
 

--

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