I've been experiencing some serious performance issues that appear to be
I/O-related with a dual-Xeon 2.4.22 mail server.
The server has a SuperMicro Super P4DP6 motherboard with dual Xeon
2.4Ghz processors and 4 GB of RAM. One of the two onboard Adaptec 7899P
SCSI chipsets is being used to contr
On Sat, Nov 01, 2003 at 08:37:42AM +1100, Russell Coker wrote:
> On Sat, 1 Nov 2003 07:38, Daniel Erat wrote:
> > The server has a SuperMicro Super P4DP6 motherboard with dual Xeon
> > 2.4Ghz processors and 4 GB of RAM. One of the two onboard Adaptec
> > 7899P SCSI chip
On Sat, Nov 01, 2003 at 08:26:40AM +1100, Glenn Hocking wrote:
> Hi Daniel
>
> My experience is that SMP is only great in some specific situations,
> normally where all the software and hardware is built for the specific
> SMP implementation.
>
> As an example, I had a lot of problems with DPTs R
On Sun, Nov 02, 2003 at 01:08:14PM +1100, Russell Coker wrote:
> I am not sure what exactly needs to be done, I was not in a position
> to do much testing. I suspect that you need to recompile without
> high-mem support.
[snip]
Just as a followup, the problem appears to have gone away after we
pu
On Wed, Jan 28, 2004 at 01:38:29PM -0800, Mark Ferlatte wrote:
[snip]
> The problem (bug) is that block device IO has to go through buffers
> that are below 1GB. The memory manager doesn't know this, so what
> happens is that the IO layer requests a block of memory below 1GB, and
> the swapout dae
I've been experiencing some serious performance issues that appear to be
I/O-related with a dual-Xeon 2.4.22 mail server.
The server has a SuperMicro Super P4DP6 motherboard with dual Xeon
2.4Ghz processors and 4 GB of RAM. One of the two onboard Adaptec 7899P
SCSI chipsets is being used to contr
On Sat, Nov 01, 2003 at 08:37:42AM +1100, Russell Coker wrote:
> On Sat, 1 Nov 2003 07:38, Daniel Erat wrote:
> > The server has a SuperMicro Super P4DP6 motherboard with dual Xeon
> > 2.4Ghz processors and 4 GB of RAM. One of the two onboard Adaptec
> > 7899P SCSI chip
On Sat, Nov 01, 2003 at 08:26:40AM +1100, Glenn Hocking wrote:
> Hi Daniel
>
> My experience is that SMP is only great in some specific situations,
> normally where all the software and hardware is built for the specific
> SMP implementation.
>
> As an example, I had a lot of problems with DPTs R
On Sun, Nov 02, 2003 at 01:08:14PM +1100, Russell Coker wrote:
> I am not sure what exactly needs to be done, I was not in a position
> to do much testing. I suspect that you need to recompile without
> high-mem support.
[snip]
Just as a followup, the problem appears to have gone away after we
pu
On Wed, Jan 28, 2004 at 01:38:29PM -0800, Mark Ferlatte wrote:
[snip]
> The problem (bug) is that block device IO has to go through buffers
> that are below 1GB. The memory manager doesn't know this, so what
> happens is that the IO layer requests a block of memory below 1GB, and
> the swapout dae
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