"Curtis Faith" <curtis@galtair.com> writes:
> So, why don't we use files opened with O_DSYNC | O_APPEND for the WAL log
> and then use aio_write for all log writes?
We already offer an O_DSYNC option. It's not obvious to me what
aio_write brings to the table (aside from loss of portability).
You still have to wait for the final write to complete, no?
> 2) Allow transactions to complete and do work while other threads are
> waiting on the completion of the log write.
I'm missing something. There is no useful work that a transaction can
do between writing its commit record and reporting completion, is there?
It has to wait for that record to hit disk.
regards, tom lane