Oracle uses it's own cache, so this shoud be OK on Linux.
That's not the issue -- the issue is when Oracle writes to disk, it
expects the data to hit the platters before the calls returns,
without this you cannot ensure the data integrity.
When it writes, it's no differnt than the buffer cache flushing
dirty buffers in the background.
Except it expects the writes to occur NOW and IN ORDER. Without this,
recovery after a failure isn't possible.
--cw
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