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@@ -27,11 +27,15 @@ Each running service require:
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Each connected client require:
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<ul>
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<li>1*thread (process)
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-<li>2*socket (file descriptor). For FTP 4 sockets are required.
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+<li>2*socket (file descriptor). For FTP 4 sockets are required.
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+<br>Under linux since 0.9 splice() is used. It much more effective, but requires
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+<br>2*socket (file descriptor) + 2*pipe (file descriptors) = 4 file descriptors.
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+<br>For FTP 4 sockets and 2 pipes are required with splice().
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<br>1 additional socket (file descriptor) during name resolution for non-cached names
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<br>1 additional socket during authentication or logging for RADIUS authentication or logging.
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<li>1*ephemeral port (3*ephemeral ports for FTP connection).
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<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'.
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+<li>a lot of system buffers, specially in the case of slow network connections.
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</ul>
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Also, additional resources like system buffers are required for network activity.
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<h4>Setting ulimits</h4>
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