My bad configuration of mod_proxy and Starman

README

% starman --listen :21081 www/index.psgi
でStarmanを起動しておくと、

% ab -c 5 -n 500 http://127.0.0.1:21082/
を10回くらいやると、ひっかかるリクエストが出てレスポンスが極端に悪くなる。

Percentage of the requests served within a certain time (ms)
  50%      1
  66%      1
  75%      1
  80%      1
  90%      4
  95%   1008
  98%   1994
  99%   2003
 100%   2020 (longest request)


% starman --workers 10 --listen :21081 www/index.psgi

とすると、問題なし。

httpd.conf

LoadModule proxy_module /usr/libexec/apache2/mod_proxy.so
LoadModule proxy_http_module libexec/apache2/mod_proxy_http.so

ServerRoot /tmp/test_proxy
PidFile logs/httpd.pid
LockFile logs/accept.lock
Listen 21082
DocumentRoot /tmp/test_proxy/www

ProxyPass / http://127.0.0.1:21081/

# % httpd -l
# Compiled in modules:
#   core.c
#   prefork.c
#   http_core.c
#   mod_so.c

index.psgi

sub { [200, [
        'Content-Type'   => 'text/plain',
        'Content-Length' => '6',
], ["HELLO\n"] ] };