Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> If I/O is a problem, then surely you will agree that PreAllocXLog is
> still required and should not be run by a backend?
It is still required, but it isn't run by backends --- it's fired off
during checkpoints. I think there was some discussion recently about
making it more aggressive about allocating future segments; which
strikes me as a good idea.
regards, tom lane
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