Re: solaris slow

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.