Re: Calculating maximum throughput for an Apache based system

Robin-David Hammond <kb3ien@xxxxxxxx> · Fri, 23 Mar 2007 10:30:14 -0400 (EDT)

I have one stat to offer.

NetBSD 4.0_BETA2 (ANDROMEDA-$Revision: 4.212 $) #0: Wed Jan 17 07:52:19 

PST 2007

total memory = 1536 MB
avail memory = 1485 MB
timecounter: Timecounters tick every 10.000 msec
found Grand Central at 0xf3000000
mainbus0 (root)
cpu0 at mainbus0: 750 (Revision 2.3), ID 0 (primary)

cpu0: HID0 8290c2a4<EMCP,ECLK,DOZE,DPM,ICE,DCE,SPD,SGE,BTIC,BHT>, 

powersave: 1

cpu0: 500.00 MHz, no-parity 2MB WB L2 cache (FB SRAM) at ratio

.
.
.

pchb0 at pci0 dev 11 function 0
pchb0: Apple Computer Bandit Host-PCI Bridge (rev. 0x03)
esiop0 at pci0 dev 13 function 0: Symbios Logic 53c896 (ultra2-wide scsi)
esiop0: using on-board RAM
esiop0: interrupting at irq 23
scsibus0 at esiop0: 16 targets, 8 luns per target
esiop1 at pci0 dev 13 function 1: Symbios Logic 53c896 (ultra2-wide scsi)
esiop1: using on-board RAM
esiop1: interrupting at irq 23
scsibus1 at esiop1: 16 targets, 8 luns per target

this machine has pushed about 45 Mbps no sweat.

the busses are PCI 32/33

Robin-David Hammond  KB3IEN

On Fri, 23 Mar 2007, Wm.A.Stafford wrote:

I have been asked to come up with a figure for the number of users per unit 

time our

Apache-based site can support and to indicate the resource; memory, disk 

space etc,  that

would be maxed out when this number of users was reached.

There are so many assumptions that would have to be made, such as average 

time

per request,  average memory usage per request that I don't think such a 

measure

would be very realistic.  Nevertheless, I have to come up with something.

Are there any existing statistics or algorithms that deal with this sort of 

thing?

I apologize in advance for this desperate fishing expedition.

-=bill

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