我需要更改哪些httpd conf设置才能增加Apache的最大并发连接数?注意:我关闭了KeepAlive,因为它主要是一个API服务器。
#
# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
#
KeepAlive Off
#
# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend you leave this number high, for maximum performance.
#
MaxKeepAliveRequests 100
#
# KeepAliveTimeout: Number of seconds to wait for the next request from the
# same client on the same connection.
#
KeepAliveTimeout 15
##
## Server-Pool Size Regulation (MPM specific)
##
# 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
<IfModule prefork.c>
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
</IfModule>
# 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
<IfModule worker.c>
StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
发布于 2013-05-05 01:09:07
下面是关于MaxClients和MaxRequestsPerChild计算的详细说明
ServerLimit 16
StartServers 2
MaxClients 200
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
首先,每当apache启动时,它都会启动两个子进程,这两个子进程由StartServers
参数决定。然后,每个进程将启动由ThreadsPerChild
参数确定的25个线程,因此这意味着2个进程只能服务于50个并发连接/客户端,即25x2=50。现在,如果有更多的并发用户,那么另一个子进程将启动,可以为另外25个用户提供服务。但是可以启动多少子进程是由ServerLimit
参数控制的,这意味着在上面的配置中,我总共可以有16个子进程,每个子进程可以处理25个线程,总共可以处理16x25=400并发用户。但是如果在MaxClients
中定义的数字小于这里的200,那么这意味着在8个子进程之后,不会启动额外的进程,因为我们已经定义了MaxClients
的上限。这也意味着,如果我将MaxClients
设置为1000,那么在16个子进程和400个连接之后,将不会启动任何额外的进程,即使我们增加了MaxClient
参数,我们也不能为超过400个并发客户端提供服务。在这种情况下,我们还需要将ServerLimit
增加到1000/25,即MaxClients/ThreadsPerChild=40
,以便这是服务器1000客户端的优化配置
<IfModule mpm_worker_module>
ServerLimit 40
StartServers 2
MaxClients 1000
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
</IfModule>
发布于 2010-08-03 00:04:35
更改MaxClients指令。现在是256。
https://stackoverflow.com/questions/3389496
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