Re: Deadlock in XLogInsert at AIX

Hi Tony,

On 02.02.2017 17:10, REIX, Tony wrote:
>
> Hi Konstantin
>
> I've discussed the "zombie/exit" issue with our expert here.
>
> - He does not think that AIX has anything special here
>
> - If the process is marked <exiting> in ps, this is because the flag
> SEXIT is set, thus the process is blocked somewhere in the kexitx()
> syscall, waiting for something.
>
> - In order to know what it is waiting for, the best would be to have a
> look with *kdb*.
>

kdb shows the following stack:

pvthread+073000 STACK:
[005E1958]slock+000578 (00000000005E1958, 8000000000001032 [??])
[00009558].simple_lock+000058 ()
[00651DBC]vm_relalias+00019C (??, ??, ??, ??, ??)
[006544AC]vm_map_entry_delete+00074C (??, ??, ??)
[00659C30]vm_map_delete+000150 (??, ??, ??, ??)
[00659D88]vm_map_deallocate+000048 (??, ??)
[0011C588]kexitx+001408 (??)
[000BB08C]kexit+00008C ()
___ Recovery (FFFFFFFFFFF9290) ___
WARNING: Eyecatcher/version mismatch in RWA

--
Konstantin Knizhnik
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company