how many TCP-connections at the same time per default?

Hi guys,

I want to know how many TCP-connections apache allows at the same time
per default.

Is it the Max_Clients setting?
If I understand it correctly, it is not the Max_clients-setting because
a Client can have more than one TCP Connection..

THX

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Re: how many TCP-connections at the same time per

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Depends on if you have KeepAlive turned On and the value of the
MaxKeepAliveRequests. Otherwise I guess the number of TCP
connections/sockets is limited by the OS i.e the number of file descriptors
per process.

Igor

On Mon, Mar 22, 2010 at 2:17 PM, Andreas <619forlife@web.de> wrote:

> Hi guys,
>
> I want to know how many TCP-connections apache allows at the same time per
> default.
>
> Is it the Max_Clients setting?
> If I understand it correctly, it is not the Max_clients-setting because a
> Client can have more than one TCP Connection..
>
> THX
>
> ------------------------------------------------------------ ---------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>

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Content-Transfer-Encoding: quoted-printable

Depends on if you have KeepAlive turned On and the value of the MaxKeepAliv=
eRequests. Otherwise I guess the number of TCP connections/sockets is limit=
ed by the OS i.e the number of file descriptors per process.

Igor >

Re: how many TCP-connections at the same time per

On Sun, Mar 21, 2010 at 11:17 PM, Andreas <619forlife@web.de> wrote:
> Hi guys,
>
> I want to know how many TCP-connections apache allows at the same time per
> default.
>
> Is it the Max_Clients setting?
> If I understand it correctly, it is not the Max_clients-setting because a
> Client can have more than one TCP Connection.

MaxClients is misnamed, probably because clients generally had only
one connection each when the directive was introduced.

MaxClients is the maximum number of client connections handled by
httpd simultaneously. (There can be more TCP connections though --
new connections that haven't yet been noticed by httpd, and
terminating connections that no longer require processing by httpd.)

MaxClients is subject to system resources, including RAM and file descriptors.

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Re: how many TCP-connections at the same time per default?

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Jeff Trawick wrote:
> On Sun, Mar 21, 2010 at 11:17 PM, Andreas <619forlife@web.de> wrote:
>
>> Hi guys,
>>
>> I want to know how many TCP-connections apache allows at the same time per
>> default.
>>
>> Is it the Max_Clients setting?
>> If I understand it correctly, it is not the Max_clients-setting because a
>> Client can have more than one TCP Connection.
>>
>
> MaxClients is misnamed, probably because clients generally had only
> one connection each when the directive was introduced.
>
> MaxClients is the maximum number of client connections handled by
> httpd simultaneously. (There can be more TCP connections though --
> new connections that haven't yet been noticed by httpd, and
> terminating connections that no longer require processing by httpd.)
>
> MaxClients is subject to system resources, including RAM and file descriptors.
>
> ------------------------------------------------------------ ---------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
>
ok thx for the answer..

so maxClients means max active TCP Connections that are actually handled
by apache?

The number of simultaneous TCP-Connections that require no processing of
apache is not fixed?

THX


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Jeff Trawick wrote:
cite="mid:cc67648e1003220423o4644cfbs808268e3214a5f1d@mail.g mail.com"
type="cite">

On Sun, Mar 21, 2010 at 11:17 PM, Andreas  wrote:

  

Hi guys,



I want to know how many TCP-connections apache allows at the same time per

default.



Is it the Max_Clients setting?

If I understand it correctly, it is not the Max_clients-setting because a

Client can have more than one TCP Connection.

    

MaxClients is misnamed, probably because clients generally had only

one connection each when the directive was introduced.



MaxClients is the maximum number of client connections handled by

httpd simultaneously.  (There can be more TCP connections though --

new connections that haven't yet been noticed by httpd, and

terminating connections that no longer require processing by httpd.)



MaxClients is subject to system resources, including RAM and file descriptors.



 ------------------------------------------------------------ ---------

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See  for more info.

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Re: how many TCP-connections at the same time per

On Mon, Mar 22, 2010 at 9:43 AM, Andreas <619forlife@web.de> wrote:
> Jeff Trawick wrote:
>
> On Sun, Mar 21, 2010 at 11:17 PM, Andreas <619forlife@web.de> wrote:
>
>
> Hi guys,
>
> I want to know how many TCP-connections apache allows at the same time per
> default.
>
> Is it the Max_Clients setting?
> If I understand it correctly, it is not the Max_clients-setting because a
> Client can have more than one TCP Connection.
>
>
> MaxClients is misnamed, probably because clients generally had only
> one connection each when the directive was introduced.
>
> MaxClients is the maximum number of client connections handled by
> httpd simultaneously. (There can be more TCP connections though --
> new connections that haven't yet been noticed by httpd, and
> terminating connections that no longer require processing by httpd.)
>
> MaxClients is subject to system resources, including RAM and file
> descriptors.
>
> ------------------------------------------------------------ ---------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
>
>
> ok thx for the answer..
>
> so maxClients means max active TCP Connections that are actually handled by
> apache?
>
> The number of simultaneous TCP-Connections that require no processing of
> apache is not fixed?

a. new connections, either being established or established but not
yet processed by httpd:

the number of these might be fixed by TCP layer tuning

httpd's ListenBacklog directive does influence the maximum number, but
not directly (i.e., not 1:1); higher ListenBacklog "should" allow more
connections in this phase, possibly in conjunction with TCP-layer
tuning

b. old connections, with HTTP processing finished (e.g., TIME_WAIT)

the number might be fixed by TCP layer tuning

httpd doesn't have any directives that apply to this

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