We are using an Alphastation 255 4/233 w/64 megs of RAM and 800 megs of
swap space. We are running netscape httpd server (v1.12) for about 42
"virtual" hosts. Each host is running using on average 21 processes (900
total processes/42 httpd daemon parent/children sets = 21 per host).
Performance does not appear to be at the level it should be. Load
averages are down to reasonable levels but occasionally jump up fairly
high. This would tell me CPU is not the problem. In addition, the 255
is on a switched ethernet segment so I don't think that network is a
problem at this point either (not dropping packets, turnaround time is
decent). This would lead me to the conclusion that memory is the
problem. However, I dont believe that more memory would *necessarily*
help. It seems a pretty ridiculous thing to do to have 900 processes
running for 42 web sites! Is there any way to come up with a more
manageable, less memory solution?
My understanding is that since swapping is high (iostat reports pretty
high numbers on the swap disk) but swap space consumed is only about 9%
(72 megs) that having all these processes around are just wasting
resources! Is there a multi-threaded solution that would consume less
resources to function the same way? Maybe I will be resolved enough to
write one...
Another question that we will soon have to deal with: is it possible to
do addresses from multiple subnets for aliases on the dec cddi card?
- Thank you!
Brad Block
Received on Sun May 19 1996 - 05:23:11 NZST