On Sat, Jun 15, 2002 at 02:55:55PM -0500, Burton M. Strauss III wrote:
> So, some comparison data is in order.
>
> (I used nntp, not ftp - it's easier to get a steady measurable load)
>
> CPU load (top): 0.7% to 1.5%
> Hardware: Pentium III 800 (100MHz FSB), ample free memory
I'm running on a mere Celeron 300.
> Configuration: running solely as a monitor (i.e. the monitoring box is NOT
> the NAT/Firewall/Gateway).
Similar. There's only the ftp server. No NAT, firewalling or gateway.
> Average network load: 1300 Kbps
> Network configuration: Cable Modem, capped at 1500 Kbps (so that's
> effectively pegged...)
Connected to a 100mbit LAN. Usually gives ftp downloads at a rate of
about 9MB/s. Slowed down to 5MB/s when ntop is running.
>
> 2:47pm up 33 days, 20:20, 1 user, load average: 0.00, 0.00, 0.00
> 34 processes: 31 sleeping, 3 running, 0 zombie, 0 stopped
> CPU states: 1.1% user, 1.3% system, 0.0% nice, 97.4% idle
> Mem: 125848K av, 121280K used, 4568K free, 0K shrd, 42196K
> buff
> Swap: 257032K av, 7700K used, 249332K free 13916K
> cached
9:59pm up 6 days, 3:03, 1 user, load average: 0.88, 0.21, 0.07
46 processes: 41 sleeping, 5 running, 0 zombie, 0 stopped
CPU states: 40.5% user, 58.2% system, 0.0% nice, 1.1% idle
Mem: 255892K av, 252404K used, 3488K free, 0K shrd, 34552K buff
Swap: 1024120K av, 3292K used, 1020828K free 143256K cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
12506 ftp 25 0 1196 1196 776 R 49.9 0.4 0:11 proftpd
12505 ntop 25 0 8052 6204 1368 R 47.9 2.4 0:08 ntop
12509 root 15 0 1024 1024 836 R 0.5 0.4 0:00 top
> If you are processor OR memory constrained, you are going to see a
> performance hit, of course...
I was supposing that 300Mhz should be able to handle this?
Is it possible to tweak ntop to improve performance? I don't really need
all the details (like I don't need protocol decoding, or tcp session handling).
The stable 2.0 release had a -A switch that enabled me to do this, but I
haven't found anything comparable in the current version?
--
Raiser, Frank
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