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

2017-06-28 Thread Adrian Klaver
On 06/27/2017 11:47 PM, Daniel Westermann wrote: AFAIK the wal writer process. ​>Um, no. "Synchronous" means that the caller has to wait for the result to appear before it can move on. "Asynchronous" means that >he caller can issue the instruction and immediately move on. I guessing

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

2017-06-28 Thread Daniel Westermann
AFAIK the wal writer process. ​>Um, no. "Synchronous" means that the caller has to wait for the result to appear before it can move on. "Asynchronous" means that >he caller can issue the instruction and immediately move on. I guessing here but while usually the caller would have to

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

2017-06-27 Thread David G. Johnston
On Tue, Jun 27, 2017 at 3:52 PM, Adrian Klaver wrote: > On 06/27/2017 11:19 AM, Daniel Westermann wrote: > > > > 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 >

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

2017-06-27 Thread Adrian Klaver
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

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

2017-06-27 Thread David G. Johnston
On Tuesday, June 27, 2017, Daniel Westermann < daniel.westerm...@dbi-services.com> wrote: > >On 06/23/2017 05:50 AM, Daniel Westermann wrote: > > 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

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

2017-06-27 Thread Daniel Westermann
>On 06/23/2017 05:50 AM, Daniel Westermann wrote: >> Hi all, >> >> as I did not find the answer in the documentation: Which background >> process is actually doing the writes/flushes to the WAL? In the docs >> ( https://www.postgresql.org/docs/10/static/wal-configuration.html ) it is >>

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

2017-06-23 Thread Adrian Klaver
On 06/23/2017 05:50 AM, Daniel Westermann wrote: Hi all, as I did not find the answer in the documentation: Which background process is actually doing the writes/flushes to the WAL? In the docs (https://www.postgresql.org/docs/10/static/wal-configuration.html) it is explained which internal