如何在Apache中增加并发连接的最大数量？
如何在Apache中增加并发连接的最大数量？
提问于 2010-08-03 00:02:53
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>回答 2
Stack Overflow用户
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>Stack Overflow用户
发布于 2010-08-03 00:04:35
更改MaxClients指令。现在是256。
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原文链接：
https://stackoverflow.com/questions/3389496
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