Tom Lane wrote:
> "Heikki Linnakangas" <[EMAIL PROTECTED]> writes:
>> * mmap the WAL segments, instead of using the slru buffers.
> This one's almost certainly a nonstarter, for lack of any portable way
> to control when writes happen.

For flushing, there's msync, which I believe is quite portable.

We mustn't write data pages before the WAL hits the disk, but we don't
have any such limitation for WAL.

  Heikki Linnakangas

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