Red Hat NETWORK PROXY SERVER 3.7 - Manual do Utilizador descarregar pdf (Página 33)

2.2 httpd.conf 23

KeepAliveTimeout KeepAliveTimeout setsthenumberofsecondsyour

server will wait for a subsequent request, after a request has been

served, before it closes the connection. Once a request has been re-

ceived, the Timeout directive applies instead.

MinSpareServers and MaxSpareServers The Apache web server dy-

namically adapts to the perceived load by maintaining an appropri-

ate number of spareserver processesbased on the trafﬁc. The server

checks the number of servers waiting for a request and kills some if

there are more than MaxSpareServers or creates some if the num-

ber of servers is less than MinSpareServers. Your server’s default

MinSpareServers is 8; your server’s default MaxSpareServers

is 20. These default settings should be appropriate in almost all sit-

uations. You should not increase the MinSpareServers to a very

large number, since that will create a heavy processing load on your

server even when trafﬁcis light.

StartServers StartServers sets how many server processes are cre-

ated upon startup. Since your web server dynamically kills and cre-

ates server processes based on trafﬁc load, you won’t ever need to

change this parameter. Your web server is set to start ten server pro-

cesses at startup.

MaxClients MaxClients sets a limit on the total number of server pro-

cesses (i.e., simultaneously connected clients) that can run at one

time. You wanttokeepMaxClients atahigh number(yourserver’s

default is set to 150), because no one else will be allowed to connect

once that number of simultaneously connected clients is reached.

You can’t set MaxClients to higher than 256 without recompiling

Apache. The main reason for having MaxClients is so that a run-

away web server doesn’t crash your operating system.

MaxRequestsPerChild MaxRequestsPerChild sets the total number

ofrequestseach child serverprocessservesbeforethechild dies. The

main reason for setting MaxRequestsPerChild is to avoid long-

lived process induced memory leaks. The default

MaxRequestsPerChild for your server is 100.

ProxyRequests If you uncomment ProxyRequests (which is set to on

but commented out), your Apache server will also function as a

proxy server. If you are enabling the proxy server, you will want to

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Red Hat NETWORK PROXY SERVER 3.7 - Manual do Utilizador Página 33