El 2 de agosto de 2010 19:14, John R Pierce <pie...@hogranch.com> escribió:
> On 08/02/10 7:35 AM, Felipe de Jesús Molina Bravo wrote: > >> Hi >> >> >> I have installed postgres 8.4.4 (libxml and plperl)on a Sun Microsystems >> sun4u Sun Fire 880 with: >> >> - 4 700Mhz processors >> ... >> >> Also I have installed postgres (8.4.2) on a PC (Dell Optiplex 960) with >> the next characteristics: >> >> - 3 Gb ram >> - 1 processor of 3.2 Ghz Dual Core >> > ... > > dual 3.2Ghz Core2 processor cores are going to be far faster than a 9 year > old quad 700Mhz ultrasparc-III's, regardless of the operating system. > > If you want to compare operating system performance, you should do so on > the same hardware platform. > > btw, the standard disks on a SunFire 880 are FC-AL not SCSI... old 1Gbps > FC, I believe, with 36-146GB 10K rpm FC drives standard, with all the > internal drives sharing the same 1Gbps FC port. > Another factor, if your linux system was using LVM (its the default storage > configuration on many distributions), there's a pretty good chance the drive > mapper is ignoring write barriers, which greatly speeds up random writes at > the expense of reliable commits. > > My file-system is Reiser 3. I try with "CACHE turned on" (recommendation from Josua ... thanks) with the same results. I tried to migrate my database from the PC to Sun ... with the same performance.....but I can not My conclution is: I'll ever get similar performance because the technology of PC is more recent than SUN .... thanks to all for your answers see you
