Re: WALWriter active during recovery

On 16 December 2014 at 14:12, Heikki Linnakangas
<hlinnakangas@vmware.com> wrote:
> On 12/15/2014 08:51 PM, Simon Riggs wrote:
>>
>> Currently, WALReceiver writes and fsyncs data it receives. Clearly,
>> while we are waiting for an fsync we aren't doing any other useful
>> work.
>>
>> Following patch starts WALWriter during recovery and makes it
>> responsible for fsyncing data, allowing WALReceiver to progress other
>> useful actions.
>
>
> What other useful actions can WAL receiver do while it's waiting? It doesn't
> do much else than receive WAL, and fsync it to disk.

So now it will only need to do one of those two things.

-- Simon Riggs                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services