Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> "Curtis Faith" <curtis(at)galtair(dot)com> writes:
> > The log file would be opened O_DSYNC, O_APPEND every time.
>
> Keep in mind that we support platforms without O_DSYNC. I am not
> sure whether there are any that don't have O_SYNC either, but I am
> fairly sure that we measured O_SYNC to be slower than fsync()s on
> some platforms.
And don't we preallocate WAL files anyway? So O_APPEND would be
irrelevant?
-Doug