Update highload.html with splice() requirements

This commit is contained in:
z3APA3A 2018-04-28 01:56:13 +03:00
parent b583e423c8
commit b56c294c01

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@ -27,11 +27,15 @@ Each running service require:
Each connected client require:
<ul>
<li>1*thread (process)
<li>2*socket (file descriptor). For FTP 4 sockets are required.
<li>2*socket (file descriptor). For FTP 4 sockets are required.
<br>Under linux since 0.9 splice() is used. It much more effective, but requires
<br>2*socket (file descriptor) + 2*pipe (file descriptors) = 4 file descriptors.
<br>For FTP 4 sockets and 2 pipes are required with splice().
<br>1 additional socket (file descriptor) during name resolution for non-cached names
<br>1 additional socket during authentication or logging for RADIUS authentication or logging.
<li>1*ephemeral port (3*ephemeral ports for FTP connection).
<li>1 stack memory segment of ~32K-128K depending on the system + at least 16K and up to few MB (for 'proxy' and 'ftppr') of heap memory. If you are short of memory, prefer 'socks' to 'proxy' and 'ftppr'.
<li>a lot of system buffers, specially in the case of slow network connections.
</ul>
Also, additional resources like system buffers are required for network activity.
<h4>Setting ulimits</h4>