Re: WALWriter active during recovery

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.

- Heikki