X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd.socket.xml;h=7a63348caf91c551671fef4c56215c482cf844ec;hp=09a7311b85b84d6fc8896cc620c05f8aa38a80e9;hb=fb7661a6020b5680d5647d3d85b0501a4f3a5042;hpb=5aded369782f28255bc6b494ca905d7acaea7a56 diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml index 09a7311b8..7a63348ca 100644 --- a/man/systemd.socket.xml +++ b/man/systemd.socket.xml @@ -487,6 +487,53 @@ . + + KeepAliveTimeSec= + Takes time (in seconds) as argument . The connection needs to remain + idle before TCP starts sending keepalive probes. This controls the TCP_KEEPIDLE + socket option (see + socket7 + and the TCP + Keepalive HOWTO for details.) + Defaults value is 7200 seconds (2 hours). + + + + KeepAliveIntervalSec= + Takes time (in seconds) as argument between individual keepalive probes, + if the socket option SO_KEEPALIVE has been set on this socket seconds as argument. + This controls the TCP_KEEPINTVL socket option (see + socket7 + and the TCP + Keepalive HOWTO for details.) + Defaults value is 75 seconds. + + + + KeepAliveProbes= + Takes integer as argument. It's the number of unacknowledged probes to + send before considering the connection dead and notifying the application layer. + This controls the TCP_KEEPCNT socket option (see + socket7 + and the TCP + Keepalive HOWTO for details.) + Defaults value is 9. + + + + NoDelay= + Takes a boolean + argument. TCP Nagle's algorithm works by combining a number of + small outgoing messages, and sending them all at once. + This controls the TCP_NODELAY socket option (see + tcp7 + Defaults to + . + + Priority= Takes an integer @@ -498,6 +545,47 @@ for details.). + + DeferAcceptSec= + + Takes time (in + seconds) as argument. If set, the + listening process will be awakened + only when data arrives on the socket, + and not immediately when connection is + established. When this option is set, + the + TCP_DEFER_ACCEPT + socket option will be used (see + tcp7), + and the kernel will ignore initial ACK + packets without any data. The argument + specifies the approximate amount of + time the kernel should wait for + incoming data before falling back to + the normal behaviour of honouring + empty ACK packets. This option is + beneficial for protocols where the + client sends the data first (e.g. + HTTP, in contrast to SMTP), because + the server process will not be woken + up unnecessarily before it can take + any action. + + + If the client also uses the + TCP_DEFER_ACCEPT + option, the latency of the initial + connection may be reduced, because the + kernel will send data in the final + packet establishing the connection + (the third packet in the "three-way + handshake"). + + Disabled by default. + + + ReceiveBuffer= SendBuffer= @@ -722,16 +810,18 @@ finish. If a command does not exit within the configured time, the socket will be considered failed and be shut - down again. All commands still running, + down again. All commands still running will be terminated forcibly via SIGTERM, and after another delay of this time with SIGKILL. (See in systemd.kill5.) Takes a unit-less value in seconds, or a time span value such as "5min - 20s". Pass 0 to disable the timeout - logic. Defaults to TimeoutStartSec= from the - manager configuration file. + 20s". Pass 0 to disable the timeout + logic. Defaults to DefaultTimeoutStartSec= from the + manager configuration file + (see systemd-systemd.conf5). + @@ -799,7 +889,7 @@ See Also systemd1, - systemctl8, + systemctl1, systemd.unit5, systemd.exec5, systemd.kill5,