Eu vi que mudar "localhost" para "127.0.0.1" reduz drasticamente o tempo que o mod_proxy leva. Mas eu não sei por quê. Eu realmente adoraria ver uma resposta para isso. Não consigo imaginar que demore um segundo inteiro para resolver o localhost.
Aqui está a situação
C:\>ab -n 100 -c 5 http://webserver/track/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking webserver (be patient).....done
Server Software: Mongrel
Server Hostname: webserver
Server Port: 80
Document Path: /track/
Document Length: 111 bytes
Concurrency Level: 5
Time taken for tests: 20.176 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Non-2xx responses: 100
Total transferred: 58104 bytes
HTML transferred: 11100 bytes
Requests per second: 4.96 [#/sec] (mean)
Time per request: 1008.801 [ms] (mean)
Time per request: 201.760 [ms] (mean, across all concurrent requests)
Transfer rate: 2.81 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 0.5 1 2
Processing: 994 1005 12.8 999 1055
Waiting: 994 1004 12.8 997 1055
Total: 995 1006 12.9 999 1056
Percentage of the requests served within a certain time (ms)
50% 999
66% 1009
75% 1013
80% 1014
90% 1015
95% 1045
98% 1055
99% 1056
100% 1056 (longest request)
C:\>ab -n 100 -c 5 http://webserver:8001/track/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking webserver (be patient).....done
Server Software: Mongrel
Server Hostname: webserver
Server Port: 8001
Document Path: /track/
Document Length: 116 bytes
Concurrency Level: 5
Time taken for tests: 0.711 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Non-2xx responses: 100
Total transferred: 59106 bytes
HTML transferred: 11600 bytes
Requests per second: 140.63 [#/sec] (mean)
Time per request: 35.554 [ms] (mean)
Time per request: 7.111 [ms] (mean, across all concurrent requests)
Transfer rate: 81.17 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 0.3 1 2
Processing: 17 33 13.8 30 92
Waiting: 16 32 13.8 28 91
Total: 19 34 13.8 31 93
Percentage of the requests served within a certain time (ms)
50% 31
66% 32
75% 34
80% 34
90% 35
95% 93
98% 93
99% 93
100% 93 (longest request)
Como você pode ver, passar pelo Apache é várias ordens de magnitude mais lento do que atingir diretamente o Mongrel. Aqui está o meu httpd.conf:
LoadModule actions_module modules/mod_actions.so
LoadModule alias_module modules/mod_alias.so
LoadModule asis_module modules/mod_asis.so
LoadModule auth_basic_module modules/mod_auth_basic.so
#LoadModule auth_digest_module modules/mod_auth_digest.so
#LoadModule authn_alias_module modules/mod_authn_alias.so
#LoadModule authn_anon_module modules/mod_authn_anon.so
#LoadModule authn_dbd_module modules/mod_authn_dbd.so
#LoadModule authn_dbm_module modules/mod_authn_dbm.so
LoadModule authn_default_module modules/mod_authn_default.so
LoadModule authn_file_module modules/mod_authn_file.so
#LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
#LoadModule authz_dbm_module modules/mod_authz_dbm.so
LoadModule authz_default_module modules/mod_authz_default.so
LoadModule authz_groupfile_module modules/mod_authz_groupfile.so
LoadModule authz_host_module modules/mod_authz_host.so
#LoadModule authz_owner_module modules/mod_authz_owner.so
LoadModule authz_user_module modules/mod_authz_user.so
LoadModule autoindex_module modules/mod_autoindex.so
#LoadModule cache_module modules/mod_cache.so
#LoadModule cern_meta_module modules/mod_cern_meta.so
LoadModule cgi_module modules/mod_cgi.so
#LoadModule charset_lite_module modules/mod_charset_lite.so
#LoadModule dav_module modules/mod_dav.so
#LoadModule dav_fs_module modules/mod_dav_fs.so
#LoadModule dav_lock_module modules/mod_dav_lock.so
#LoadModule dbd_module modules/mod_dbd.so
#LoadModule deflate_module modules/mod_deflate.so
LoadModule dir_module modules/mod_dir.so
#LoadModule disk_cache_module modules/mod_disk_cache.so
#LoadModule dumpio_module modules/mod_dumpio.so
LoadModule env_module modules/mod_env.so
#LoadModule expires_module modules/mod_expires.so
#LoadModule ext_filter_module modules/mod_ext_filter.so
#LoadModule file_cache_module modules/mod_file_cache.so
#LoadModule filter_module modules/mod_filter.so
LoadModule headers_module modules/mod_headers.so
#LoadModule ident_module modules/mod_ident.so
#LoadModule imagemap_module modules/mod_imagemap.so
LoadModule include_module modules/mod_include.so
#LoadModule info_module modules/mod_info.so
LoadModule isapi_module modules/mod_isapi.so
#LoadModule ldap_module modules/mod_ldap.so
#LoadModule logio_module modules/mod_logio.so
LoadModule log_config_module modules/mod_log_config.so
#LoadModule log_forensic_module modules/mod_log_forensic.so
#LoadModule mem_cache_module modules/mod_mem_cache.so
LoadModule mime_module modules/mod_mime.so
#LoadModule mime_magic_module modules/mod_mime_magic.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule proxy_module modules/mod_proxy.so
#LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
#LoadModule proxy_connect_module modules/mod_proxy_connect.so
#LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
#LoadModule proxy_scgi_module modules/mod_proxy_scgi.so
#LoadModule reqtimeout_module modules/mod_reqtimeout.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule setenvif_module modules/mod_setenvif.so
#LoadModule speling_module modules/mod_speling.so
LoadModule ssl_module modules/mod_ssl.so
#LoadModule status_module modules/mod_status.so
#LoadModule substitute_module modules/mod_substitute.so
#LoadModule unique_id_module modules/mod_unique_id.so
#LoadModule userdir_module modules/mod_userdir.so
#LoadModule usertrack_module modules/mod_usertrack.so
#LoadModule version_module modules/mod_version.so
#LoadModule vhost_alias_module modules/mod_vhost_alias.so
LoadModule sspi_auth_module modules/mod_auth_sspi.so
LoadModule fcgid_module modules/mod_fcgid.so
# Server configuration
ServerRoot "c:/apache2"
KeepAlive On
KeepAliveTimeout 5
TimeOut 30
ThreadsPerChild 10
Listen [redacted]:80
ServerAdmin [redacted]
ServerName webserver.domain
ErrorLog "logs/error.log"
LogLevel warn
DefaultType text/plain
DocumentRoot "c:/www"
<Directory "c:/www">
RedirectMatch ^/$ /wiki/
Options -Indexes -FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
<Directory "c:/www/wiki">
AuthName "Local Intranet"
AuthType SSPI
SSPIPerRequestAuth On
SSPIAuth On
require valid-user
</Directory>
<Proxy balancer://track>
BalancerMember http://localhost:8001/track
BalancerMember http://localhost:8002/track
BalancerMember http://localhost:8003/track
</Proxy>
<Location /track>
ProxyPass balancer://track
ProxyPassReverse http://localhost:8001/track
</Location>
<Location /audit>
ProxyPass http://localhost:8004/audit
ProxyPassReverse http://localhost:8004/audit
</Location>
<Location /dev>
ProxyPass http://localhost:8010/dev
ProxyPassReverse http://localhost:8010/dev
</Location>
<Location /auth>
AuthName "Local Intranet"
AuthType SSPI
SSPIPerRequestAuth On
SSPIAuth On
require valid-user
RewriteEngine On
RewriteCond %{REMOTE_USER} (.+)
RewriteRule ^.*$ - [E=RU:%1]
RequestHeader add X-Forwarded-User %{RU}e
ProxyPass balancer://track
ProxyPassReverse http://localhost:8001/auth
</Location>
<Location /bin>
Order allow,deny
Allow from all
Satisfy Any
</Location>
<IfModule dir_module>
DirectoryIndex index.php
</IfModule>
<FilesMatch "^\.ht">
Order allow,deny
Deny from all
Satisfy All
</FilesMatch>
<IfModule log_config_module>
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
CustomLog "logs/access.log" common
</IfModule>
<IfModule mime_module>
TypesConfig conf/mime.types
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz
</IfModule>
<IfModule mod_fcgid.c>
AddHandler fcgid-script .fcgi .php
# Where to look for the php.ini file?
FcgidInitialEnv PHPRC "c:/php64"
# Set PHP_FCGI_MAX_REQUESTS to greater than or equal to FcgidMaxRequestsPerProcess
# to prevent php-cgi process from exiting before all requests completed
FcgidInitialEnv PHP_FCGI_MAX_REQUESTS 1000
# Maximum requests a process should handle before it is terminated
FcgidMaxRequestsPerProcess 1000
# Maximum number of PHP processes
FcgidMaxProcesses 15
# Number of seconds of idle time before a php-cgi process is terminated
FcgidIOTimeout 120
#Path to php-cgi
FcgidWrapper "c:/php64/php-cgi.exe" .php
# Define the MIME-Type for ".php" files
AddType application/x-httpd-php .php
FcgidMaxRequestLen 2097152
</IfModule>
Estou executando o MediaWiki ao lado de meus três processos Mongrel com balanceamento de carga. Eu tenho aplicativos da web adicionais montados em diretórios diferentes. Eu tentei desmontá-lo para um servidor mínimo que não faz nada além de encaminhar para proxies. Não faz diferença, passar pelo Apache é significativamente e visivelmente mais lento.
Os processos Mongrel são serviços criados pela gem mongrel_service, e sua linha inicial no registro se parece com isso:
"c:/ruby/bin/mongrel_service.exe" service single -e production -p 8005 -a 0.0.0.0 -l "log/authentication.log" -P "log/mongrel.pid" -c "c:/track" -t 0 -r "public" -n 1024 --prefix "/track"
O que pode estar causando essa lentidão? Como faço para solucionar problemas?