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<p style="margin-bottom: 0cm; margin-top: 0pt;">Jonathan Ben Avraham
wrote:<br>
</p>
<blockquote
cite="mid:Pine.LNX.4.64.0902021220370.16192@linray.tkos.co.il"
type="cite">Dear list members,
<br>
What limits the rate that the Linux kernel TCP stack can accept new
connections? How is that rate related to the rate that the application
listening on a port can handle the connections? That is, if I try to
connect and get ECONNREFUSED is there a way for me to know if I got it
because the kernel could not handle the connection rate or if I got it
because I had more connection attempts than the backlog parameter of my
listen() call? In other words, do I need to tune the kernel or the
application (MySQL) for the desired high connection rate and how would
I know?
<br>
</blockquote>
<br>
Just check what the value of the backlog parameter is and then use
netstat to watch the application connections when you get ECONNREFUSED
error. If the number of connections in netstat is equal (or at least
very close to) the backlog parameter then it's the backlog parameter,
otherwise it's something else.<br>
<br>
Gilad<br>
<br>
<pre class="moz-signature" cols="72">--
Gilad Ben-Yossef
Chief Coffee Drinker
Codefidence Ltd.
The code is free, your time isn't.(TM)
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The Doctor: Don't worry, Reinette, just a nightmare.
Everyone has nightmares. Even monsters from under the
bed have nightmares, don't you, monster?
Reinette: What do monsters have nightmares about?
The Doctor: Me!
</pre>
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