Dan Armbrust <[email protected]> writes:
> On Wed, Jul 8, 2009 at 1:23 PM, Tom Lane<[email protected]> wrote:
>> Well, you could increase both those settings so as to put the
>> checkpoints further apart, and/or increase checkpoint_completion_target
>> to spread the checkpoint I/O over a larger fraction of the cycle.
> Wouldn't increasing the length between checkpoints result in the
> checkpoint process taking even longer to complete?
You don't really care how long it takes. What you want is for it not to
be chewing a bigger fraction of your I/O bandwidth than you can spare.
Hence, you want it to take longer. Trying to shorten it is just going
to make the spike worse.
regards, tom lane
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