Re: Postmaster hogs CPU

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Tom Lane wrote:

| Gaetano Mendola <mendola(at)bigfoot(dot)com> writes:
|
|>You can basically renice the process that is performing the query.
|
|
| However, that's unlikely to do anything very pleasant, since you'll have
| priority-inversion problems. "nice" has no idea when the process is
| holding a lock that someone else wants ...

That can be true, however in order to have a priority-inversion problem
I think are necessary 3 different level of priority, you have carefully
choose the postmaster and good value of nice in order to have it happen.

I was wandering about do the same work done with vacuum ( the sleep
trick each n records) in order to slow some expensive but not crucial
queries:

test> set query_delay = 10; <-- 10 ms
test> select * from <very expensive query >;

Regards
Gaetano Mendola

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