Thank you for explanation about it.
I've understood that it is intended thing.
Sorry to bother you.
(2012/06/07 2:05), Tom Lane wrote:
> katsumata(dot)tomonari(at)po(dot)ntts(dot)co(dot)jp writes:
>> Now I'm testing the behavior of checkpointer,
>> and I found a difference with PostgreSQL9.1 behavior.
>> When I send SIGINT signal to writer process on PostgreSQL9.1,
>> writer process starts checkpoint.
>> But, when I send SIGINT signal to checkpointer on PostgreSQL9.2beta2,
>> checkpointer doesn't start checkpoint.
> AFAICT, the checkpointer does consider starting a checkpoint, but it
> decides not to do one, because of this recent change:
> If you had done enough updates since the last checkpoint, it would do
> one. So this isn't a bug, but an intentional reduction in checkpoint
> frequency. (Note that sending SIGINT is not, and never has been,
> equivalent to forcing a checkpoint.)
> regards, tom lane
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