Re: Proposal for 9.1: WAL streaming from WAL buffers

On Jun 11, 2010, at 16:31 , Tom Lane wrote:
> Fujii Masao <masao.fujii@gmail.com> writes:
>> In 9.0, walsender reads WAL always from the disk and sends it to the standby.
>> That is, we cannot send WAL until it has been written (and flushed) to the disk.
> 
> I believe the above statement to be incorrect: walsender does *not* wait
> for an fsync to occur.

Hm, but then Robert's failure case is real, and streaming replication might break due to an OS-level crash of the master. Or am I missing something?

best regards,
Florian Pflug