question for apache gurus -- error messages during load testing

I'm doing some httperf'ing, and when I'm cranking the load
high I see
things like this in apache:

[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1724):
proxy:
initialized single connection worker 12 in child 8499 for
(*)
[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1625):
proxy: grabbed
scoreboard slot 12 in child 8500 for worker proxy:reverse
[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1644):
proxy: worker
proxy:reverse already initialized
[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1724):
proxy:
initialized single connection worker 12 in child 8500 for
(*)
[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1625):
proxy: grabbed
scoreboard slot 12 in child 8501 for worker proxy:reverse
[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1644):
proxy: worker
proxy:reverse already initialized
[Mon May 07 19:45:18 2007] [debug] proxy_util.c(1724):
proxy:
initialized single connection worker 12 in child 8501 for
(*)

I'm guessing thats just noise, and can be safely ignored? 
googling
didnt' turn up anything helpful.

Also, this:

[Mon May 07 19:45:19 2007] [info] server seems busy, (you
may need to
increase StartServers, or Min/MaxSpareServers), spawning 8
children,
there are 0 idle, and 209 total children

This last one always happens with many children spawned,
when I start
using a rate of >70 or something like that.  So requests
were piling
up in apache, which is expected, but should I really adjust
the
prefork settings for this?  This is what i have right now:

StartServers       10
MinSpareServers    8
MaxSpareServers   30
ServerLimit      256
MaxClients       256
MaxRequestsPerChild  4000

This is apache 2.3, mongrel latest, ruby 185/rails123
stable, hitting
a pretty complex page that is using a lot of fragment
caching in
memcached.  No DB hits, though, as everything should be
sitting in
memcached.  The machine is a quad core intel with 4 gig ram,
iirc.

thx,
- Rob
-- 
http://robsanheim.com
http://seekingalpha.com

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