Date: Tue, 31 May 2005 13:14:28 -0400 From: Vivek Khera <vivek@khera.org> To: freebsd-amd64@freebsd.org Subject: Re: AMD64 Faster? Message-ID: <E620DBC1-5E97-4BB0-B80E-582480AE3EBD@khera.org> In-Reply-To: <20050531103930.N67364@zoraida.natserv.net> References: <3.0.1.32.20050530175629.00a77268@pop.redshift.com> <20050530231640.T58656@zoraida.natserv.net> <5B67FDFF-B537-4BA9-8145-898EA08437D6@khera.org> <20050531103930.N67364@zoraida.natserv.net>
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--Apple-Mail-3--333968198 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed On May 31, 2005, at 10:44 AM, Francisco Reyes wrote: > On Tue, 31 May 2005, Vivek Khera wrote: > > >> I'll confirm this with PostgreSQL. I have a 1-year old Dell 2650 >> with a 14-disk RAID array that cannot keep up with replication >> coming from a dual opteron with a 6 disk RAID array. >> > > What are you using for replication? > slony-I (see /usr/ports/database/slony1) > Compared to i386 how much memory is PostgreSQL and other apps using? > On another thread I asked about memory usage was told that apps in > AMD64 mode seemed to be taking twice as much memory. I would be > very interesting in reading about PostgreSQL memory usage in > FreeBSD AMD64. > About the same. The only thing really bigger in amd64 world is pointer size, and unless all you're building is a datastructure that has no data (ie just pointers) you're not gonna double your size... > >> For normal regular server usage, though, I don't see a need for >> opteron. >> > > I wonder other data intensive apps (ie image/audio editing) how > they would do in Fbsd-AMD64. Also I wonder if it's an advantage > only when large amounts of data are moving or lots of data in > general. For example a busy news server or email server. > I think anything that is slinging lots of bits to a disk will benefit, or anything that moves a lot of memory. The I/O on these puppies is just wicked fast. Vivek Khera, Ph.D. +1-301-869-4449 x806 --Apple-Mail-3--333968198--
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