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highload documentation updated

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z3APA3A 2017-10-06 18:38:27 +03:00
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@ -49,6 +49,13 @@ expecation.
<h4>Extending system limitation</h4>
Check manuals / documentation for your system limitations. You may need to change
sysctls or even rebuild the kernel from source.
To help with system-dependant settings, 3proxy supports different socket options
which can be set via -ol option for listening socket, -oc for proxy-to-client
socket and -os for proxy-to-server socket. Example:
<pre>
proxy -olSO_REUSEADDR,SO_REUSEPORT -ocTCP_TIMESTAMPS,TCP_NODELAY -osTCP_NODELAY
</pre>
available options are system dependant.
<h4>Extending ephemeral port range</h4>
Check ephemeral port range for your system and extend it to reuired number of ports.
Ephimeral range is always limited to maximum number of ports (64K). To extend
@ -114,4 +121,26 @@ monitor "/some/path/3proxy/3proxy.ver"
</pre>
<li> After config is updated, change version file for 3proxy to reload configuration,
e.g. with "touch /some/path/3proxy/3proxy.ver".
</ol>
</ol>
<h4>Use TCP_NODELAY to speed-up connections with small amount of data</h4>
If most requests require exchange with a small amount of data in a both ways
without the need for bandwidth, e.g. messengers or small web request,
you can eliminate Nagle's algorithm delay with TCP_NODELAY flag. Usage example:
<pre>
proxy -osTCP_NODELAY -ocTCP_NODELAY
</pre>
sets TCP_NODELAY for client (oc) and server (os) connections.
<pre>
</pre>
<h4>Use slice to speedup large data amount transfers</h4>
slice() allows to copy data between connections without copying to process
addres space. It can speedup proxy on high bandwidth connections, if most
connections require large data transfers. "-s" allows slice usage. Example:
<pre>
proxy -s
</pre>
Slice is only available in Linux and is currently beta option available in
devel version. Do not use it in production without testing. Slice requires
more system buffers, but reduces process memory usage.
Do not use slice if there is a lot of short-living connections with no bandwidth
requirements.