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List:       freebsd-hackers
Subject:    Re: PostgreSQL performance scaling
From:       Luis Neves <luis.neves () gmail ! com>
Date:       2010-11-24 1:30:01
Message-ID: ichpqp$vr8$1 () dough ! gmane ! org
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On 11/22/2010 12:21 AM, Ivan Voras wrote:

> The "semwait" part is from PostgreSQL - probably shared buffer locking,
> but there's a large number of processes regularly in sbwait - maybe
> something can be optimized here?

I think this paper was mentioned before, did you read it?... "An 
Analysis of Linux Scalability to Many Cores"?
<http://pdos.csail.mit.edu/papers/linux:osdi10.pdf>


ABSTRACT.
"This paper analyzes the scalability of seven system applications (Exim,
memcached, Apache, PostgreSQL, gmake, Psearchy, and MapReduce) running
on Linux on a 48- core computer."


The paper is about Linux, but it also focus on some changes that can be 
made to PostgreSQL to achieve better concurrency.


--
Luis Neves

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