vim /etc/httpd/conf/httpd.confprefork:多程序i/o模型.乙個主程序生成多個子程序,每個子程序響應乙個請求
# prefork mpm
# startservers: number of server processes to start
# minspareservers: minimum number of server processes which are kept spare
# maxspareservers: maximum number of server processes which are kept spare
# serverlimit: maximum value for maxclients for the lifetime of the server
# maxclients: maximum number of server processes allowed to start
# maxrequestsperchild: maximum number of requests a server process serves
startservers 8 #服務啟動時開啟的程序數
minspareservers 5 #最少空閒程序數
maxspareservers 20 #最大空閒程序數
serverlimit 256 #子程序最大值
maxclients 256 #最大的請求數
maxrequestsperchild 4000 #子程序能處理的最大請求數量,在處理完maxrequestsperchild個請求後,子程序就會被父程序終止,然後重新生成子程序.0表示不做限制
worker:復用的多程序i/o模型.多程序多執行緒.乙個主程序,生成m個子程序,每個子程序生成n個執行緒,每個執行緒響應乙個請求,併發響應請求:m*n
# worker mpm
# startservers: initial number of server processes to start
# maxclients: maximum number of simultaneous client connections
# minsparethreads: minimum number of worker threads which are kept spare
# maxsparethreads: maximum number of worker threads which are kept spare
# threadsperchild: constant number of worker threads in each server process
# maxrequestsperchild: maximum number of requests a server process serves
startservers 4 #伺服器啟動時啟動的程序數,不包括主控程序
maxclients 300 #伺服器啟動的最大執行緒數
minsparethreads 25 #最小空閒執行緒數
maxsparethreads 75 #最大空閒程序數
threadsperchild 25 #每個程序能啟動的執行緒數
maxrequestsperchild 6000 #子程序能處理的最大請求數量,在處理完maxrequestsperchild個請求後,子程序就會被父程序終止,然後重新生成子程序.0表示不做限制
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