Date: Wed, 24 Nov 2010 01:30:01 +0000 From: Luis Neves <luis.neves@gmail.com> To: freebsd-hackers@freebsd.org Cc: freebsd-performance@freebsd.org Subject: Re: PostgreSQL performance scaling Message-ID: <ichpqp$vr8$1@dough.gmane.org> In-Reply-To: <iccd37$lhh$1@dough.gmane.org> References: <iccd37$lhh$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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