Re: Which process is actually doing the WAL writes/calls XLogFlush?

On 06/27/2017 11:19 AM, Daniel Westermann wrote:
>>On 06/23/2017 05:50 AM, Daniel Westermann wrote:
>>> Hi all,

>
> Thanks, Adrian
> It is clear now for the asynchronous stuff and wal_writer.
> But I still did not figure out (or I am just not able to understand it from the README linked above)
> which process is actually doing the write to the wal when you have synchronous commit set to on. Can
> someone put some light on this?

ps axjf

/usr/local/pgsql/bin/postmaster -D /usr/local/pgsql/data
\_ postgres: logger process
\_ postgres: checkpointer process
\_ postgres: writer process
\_ postgres: wal writer process
\_ postgres: autovacuum launcher process
\_ postgres: stats collector process
\_ postgres: bgworker: pglogical supervisor

AFAIK the wal writer process.

>
> Thanks
> Daniel
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com