On Mon, Jan 8, 2018 at 1:32 PM, Thomas Munro
<thomas.munro@enterprisedb.com> wrote:
> Also pgarch.c, syncrep.c, walsender.c and walreceiver.c use
> PostmasterIsAlive() every time through their loops[1] generating extra
> syscalls, one instance of which has caused complaints before[1] on a
> system where the syscall was expensive (arguably because that kernel
> needs some work but still, it's an example of the thing you asked
> about).
>
> [1] https://www.postgresql.org/message-id/flat/20160915135755.GC19008%40genua.de
Or we could replace calls to PostmasterIsAlive() by checks on
WL_POSTMASTER_DEATH? At least for the WAL sender portion it looks
doable.
--
Michael