Re: handling of passive open -- syn and ack queues

[kuznet@xxxxxxxxxxxxx]

Hello!

>    because of the cost of allocating the full socket?

Simpler. If server does not hold traffic, it is not difficult to conclude
that opposite strategy would result in creating infinite amount of sockets,
which server has no chances ever to serve.

Bursts of load controlled by backlog length. Increase it, if it is not enough.
If increasing does not result in success, then, as you said:

> syn queue, because the acks arrive more quickly than the webserver
> finishes requests [1].

... which may mean only one thing. Your server does not hold traffic
and must be upgraded to faster one (hardware, getting rid of apache,
splitting load, etc).

Alexey