ERL-930: inet:getstat/1,2 documentation missing send_pend description

[OTP-Maintainer]

Original reporter: essen
Affected version: Not Specified
Fixed in version: OTP-22.1
Component: kernel
Migrated from: https://bugs.erlang.org/browse/ERL-930

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The documentation[1] for inet:getstat/1,2 has the right spec, but the description below is missing any details about send_pend. On the other hand it talks about a non-existant send_dvi. I looked into what send_pend really is and it seems to be the size of the driver io queue, whatever that means. I suppose it's in bytes. If someone can quickly explain I'll send a PR.

[1] http://erlang.org/doc/man/inet.html#getstat-2

[OTP-Maintainer]

essen said:

We currently get a value of 0 in a test environment for distribution sockets. We would like to know what this value refers to exactly and at which point it becomes worrisome (non-0 or above a certain amount?)

[OTP-Maintainer]

essen said:

Is this the same value as from `erlang:port_info(Port, queue_size)`?

[OTP-Maintainer]

bmk said:

Hi,

Yes its the same value!

So, its data sent on the port, that has not yet been "consumed"
by the driver (still pending).

There does not seem to be any send_dvi. Possibly this is just
a case of copy-paste... Remove.

Regards,
	/BMK

[OTP-Maintainer]

essen said:

https://github.com/erlang/otp/pull/2259

[OTP-Maintainer]

essen said:

I've added a related question in the PR. Another part of the documentation might be incorrect.