Apache newbie help - Multiple /usr/sbin/httpd2-preforks ...

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Hi guys,

I am sorry if this is such a newbie question!

I was diagnosing an un-related issue on my web-server and had to list
processes to see which PID needed to be killed. I noticed that there
were several entries for the "http2-prefork" process ...

[start]

wwwrun 8786 0.0 0.5 88452 6052 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8787 0.0 0.5 88452 6052 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8788 0.0 0.5 88452 6052 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8790 0.0 0.5 88452 6040 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8791 0.0 0.5 88452 6040 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8793 0.0 0.5 88452 6040 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8813 0.0 0.5 88452 6036 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8814 0.0 0.5 88452 6036 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

wwwrun 8815 0.0 0.5 88452 6040 ? S 10:54 0:00
/usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf

[end]

I mean, it's not a huge problem or anything the webserver seems to be
running OK - but is it right there should be multiple processes running
like this? I am sorry but I do not know if you need to view any configs
or if there is a setting somewhere that controls the number of
processes, I installed it through Yast and left it as default (as I am a
newbie and this is for a home website!).

I really would appreciate any replies that will help me to understand
better.

Thank you

Richard

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<body lang=3DEN-GB link=3Dblue vlink=3Dpurple>

<div class=3DSection1>

Hi guys, <o:p></o:p>

I am sorry if this is such a newbie question!<o:p></o:=
p>

<o:p> </o:p>

I was diagnosing an un-related issue on my web-server =
and
had to list processes to see which PID needed to be killed. I notic=
ed
that there were several entries for the “http2-prefork” proce=
ss …<o:p></o:p>

<o:p> </o:p>

[start]<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8786 0.0 0.5 88452 6052
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8787 0.0 0.5 88452 6052
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8788 0.0 0.5 88452 6052
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8790 0.0 0.5 88452 6040
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8791 0.0 0.5 88452 6040
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8793 0.0 0.5 88452 6040
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8813 0.0 0.5 88452 6036 ? =
 S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8814 0.0 0.5 88452 6036
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

<s=
pan
style=3D'font-size:6.0pt;font-family:"Courier New";color:green'>wwwrun&nb=
sp;
8815 0.0 0.5 88452 6040
? S
10:54 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.con=
f<o:p></o:p>

[end]<o:p></o:p>

<o:p> </o:p>

I mean, it’s not a huge problem or anything the
webserver seems to be running OK - but is it right there should be multip=
le
processes running like this? I am sorry but I do not know if you ne=
ed to
view any configs or if there is a setting somewhere that controls the num=
ber of
processes, I installed it through Yast and left it as default (as I am a =
newbie
and this is for a home website!).<o:p></o:p>

<o:p> </o:p>

I really would appreciate any replies that will help m=
e to
understand better.<o:p></o:p>

Thank you<o:p></o:p>

<o:p> </o:p>

Richard<o:p></o:p>

</div>


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Richard Peacock [ Fr, 26 Februar 2010 14:31 ] [ ID #2033518 ]

Re: Apache newbie help - Multiple /usr/sbin/httpd2-preforks

On Fri, Feb 26, 2010 at 8:31 AM, Richard Peacock
<richard.peacock [at] minorplanet.com> wrote:
> Hi guys,
>
> I am sorry if this is such a newbie question!
>
>
>
> I was diagnosing an un-related issue on my web-server and had to list
> processes to see which PID needed to be killed.=A0 I noticed that there w=
ere
> several entries for the =93http2-prefork=94 process =85
>

That's normal:

http://httpd.apache.org/docs/2.2/mod/prefork.html

--
Eric Covener
covener [at] gmail.com

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For additional commands, e-mail: users-help [at] httpd.apache.org

Eric Covener [ Fr, 26 Februar 2010 14:34 ] [ ID #2033519 ]

Re: Apache newbie help - Multiple /usr/sbin/httpd2-preforks

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On Fri, Feb 26, 2010 at 7:01 PM, Richard Peacock <
richard.peacock [at] minorplanet.com> wrote:

> Hi guys,
>
> I am sorry if this is such a newbie question!
>
>
>
> I was diagnosing an un-related issue on my web-server and had to list
> processes to see which PID needed to be killed. I noticed that there wer=
e
> several entries for the =93http2-prefork=94 process =85
>
>
>
> [start]
>
> wwwrun 8786 0.0 0.5 88452 6052 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8787 0.0 0.5 88452 6052 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8788 0.0 0.5 88452 6052 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8790 0.0 0.5 88452 6040 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8791 0.0 0.5 88452 6040 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8793 0.0 0.5 88452 6040 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8813 0.0 0.5 88452 6036 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8814 0.0 0.5 88452 6036 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> wwwrun 8815 0.0 0.5 88452 6040 ? S 10:54 0:00
> /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf
>
> [end]
>
>
>
> I mean, it=92s not a huge problem or anything the webserver seems to be
> running OK - but is it right there should be multiple processes running l=
ike
> this? I am sorry but I do not know if you need to view any configs or if
> there is a setting somewhere that controls the number of processes, I
> installed it through Yast and left it as default (as I am a newbie and th=
is
> is for a home website!).
>
>
>
> I really would appreciate any replies that will help me to understand
> better.
>
> Thank you
>
>
>
> Richard
>
> ************************************************************ **********
> Privileged/Confidential Information may be contained in this
> message. If you are not the addressee indicated in this
> message (or responsible for delivery of the message to such
> person), you must not copy, distribute or take any action in
> reliance to it.
> In such case, you should destroy this message and kindly
> notify the sender by reply email. Please advise immediately
> if you or your employer do not consent to Internet email for
> messages of this kind. Opinions, conclusions and other
> information in this message that do not relate to the official
> business of Minorplanet Systems plc shall be understood as
> neither given nor endorsed by it.
> Minorplanet Systems plc, Registration no: 3372097
> Minorplanet Limited, Registration no: 4072786
> Greenwich House, 223 North Street, Leeds, LS7 2AA
> VAT #: 698 1438 86
> ************************************************************ **********
>
>
>

Prefork is always like that. It will spawn a process for each request.

--
Nilesh Govindarajan
Site & Server Administrator
www.itech7.com

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<div class=3D"gmail_quote">On Fri, Feb 26, 2010 at 7:01 PM, Richard Peacock=
<<a href=3D"mailto:richard.peacock [at] minorplanet.com">r=
ichard.peacock [at] minorplanet.com</a>> wrote: <blockquote class=
=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid=
rgb(204, 204, 204); padding-left: 1ex;">

<div link=3D"blue" vlink=3D"purple" lang=3D"EN-GB">

<div>

Hi guys, 

I am sorry if this is such a newbie questi=
on!

=A0

I was diagnosing an un-related issue on my=
web-server and
had to list processes to see which PID needed to be killed.=A0 I noticed
that there were several entries for the =93http2-prefork=94 process =85</sp=
an>

=A0

[start]

wwwrun=A0=A0=A0
8786=A0 0.0=A0 0.5=A0 88452=A0 6052
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8787=A0 0.0=A0 0.5=A0 88452=A0 6052
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8788=A0 0.0=A0 0.5=A0 88452=A0 6052
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8790=A0 0.0=A0 0.5=A0 88452=A0 6040
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8791=A0 0.0=A0 0.5=A0 88452=A0 6040
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8793=A0 0.0=A0 0.5=A0 88452=A0 6040
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8813=A0 0.0=A0 0.5=A0 88452=A0 6036 ?=A0=A0=A0=A0 =A0=A0=A0S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8814=A0 0.0=A0 0.5=A0 88452=A0 6036
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


wwwrun=A0=A0=A0
8815=A0 0.0=A0 0.5=A0 88452=A0 6040
?=A0=A0=A0=A0=A0=A0=A0 S=A0=A0=A0
10:54=A0=A0 0:00 /usr/sbin/httpd2-prefork -f /etc/apache2/httpd.conf=


[end]

=A0

I mean, it=92s not a huge problem or anyth=
ing the
webserver seems to be running OK - but is it right there should be multiple
processes running like this?=A0 I am sorry but I do not know if you need to
view any configs or if there is a setting somewhere that controls the numbe=
r of
processes, I installed it through Yast and left it as default (as I am a ne=
wbie
and this is for a home website!).

=A0

I really would appreciate any replies that=
will help me to
understand better.

Thank you

=A0

Richard

</div>

<div> ************************************************************ ******=
**** Privileged/Confidential
Information may be contained in this message. If you are not the addres=
see
indicated in this message (or responsible for delivery of the message t=
o
such person), you must not copy, distribute or take any action in
 reliance to it. In such case, you should destroy this message and ki=
ndly
 notify the sender by reply email. Please advise immediately if you =
or
your employer do not consent to Internet email for messages of this kin=
d.
Opinions, conclusions and other information in this message that do not=

relate to the official business of Minorplanet Systems plc shall be
understood as neither given nor endorsed by it.</div>
<div>Minorplanet Systems plc, Registration no: 3372097 Minorplanet Limit=
ed,
Registration no: 4072786 Greenwich House, 223 North Street, Leeds, LS7=

2AA VAT #: 698 1438
86 ************************************************************ *********=
*</div>
<div> =A0</div></div>

</blockquote></div> Prefork is always like that. It will spawn a process=
for each request. -- Nilesh Govindarajan Site =
& Server Administrator <a href=3D"http://www.itech7.com">www.itech7.=
com</a> 

 

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Nilesh Govindrajan [ Fr, 26 Februar 2010 14:35 ] [ ID #2033520 ]

Re: Apache newbie help - Multiple /usr/sbin/httpd2-preforks ...

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Content-Transfer-Encoding: quoted-printable
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charset=windows-1252

On Feb 26, 2010, at 8:31 AM, Richard Peacock wrote:

> I was diagnosing an un-related issue on my web-server and had to list =
processes to see which PID needed to be killed. I noticed that there =
were several entries for the =93http2-prefork=94 process =85
>
> I mean, it=92s not a huge problem or anything the webserver seems to =
be running OK - but is it right there should be multiple processes =
running like this? I am sorry but I do not know if you need to view any =
configs or if there is a setting somewhere that controls the number of =
processes, I installed it through Yast and left it as default (as I am a =
newbie and this is for a home website!).
>

Yes, this is how it works. There's one parent process, and it pre-forks =
(creates multiple copies) in order for each one of those copies to =
handle incoming requests. It's normal and expected. Each child process =
can handle an inbound request, and the parent is responsible for =
delegating the requests to the child processes, and making sure that =
there are enough to handle the load.

--Rich=

--Apple-Mail-1--1026148743
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
charset=windows-1252

<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"> <div><div>On Feb 26, 2010, at 8:31 AM, Richard Peacock =
wrote:</div> <blockquote =
type=3D"cite"><span class=3D"Apple-style-span" style=3D"border-collapse: =
separate; font-family: Helvetica; font-size: medium; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; =
white-space: normal; widows: 2; word-spacing: 0px; =
-webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: =
0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; "><div style=3D"margin-top: 0cm; =
margin-right: 0cm; margin-bottom: 0.0001pt; margin-left: 0cm; font-size: =
12pt; font-family: 'Times New Roman'; ">I =
was diagnosing an un-related issue on my web-server and had to list =
processes to see which PID needed to be killed. I noticed that =
there were several entries for the =93http2-prefork=94 process =
=85<o:p></o:p></div><div style=3D"margin-top: 0cm; =
margin-right: 0cm; margin-bottom: 0.0001pt; margin-left: 0cm; font-size: =
12pt; font-family: 'Times New Roman'; "> </div><div =
style=3D"margin-top: 0cm; margin-right: 0cm; margin-bottom: 0.0001pt; =
margin-left: 0cm; font-size: 12pt; font-family: 'Times New Roman'; =
">I mean, it=92s not a huge problem or anything the =
webserver seems to be running OK - but is it right there should be =
multiple processes running like this? I am sorry but I do not know =
if you need to view any configs or if there is a setting somewhere that =
controls the number of processes, I installed it through Yast and left =
it as default (as I am a newbie and this is for a home =
website!).<o:p></o:p></div><div style=3D"margin-top: 0cm; =
margin-right: 0cm; margin-bottom: 0.0001pt; margin-left: 0cm; font-size: =
12pt; font-family: 'Times New Roman'; "><o:p> </o:p></div></blockquote></div> <div>=
Yes, this is how it works. There's one parent process, and it pre-forks =
(creates multiple copies) in order for each one of those copies to =
handle incoming requests. It's normal and expected. Each child process =
can handle an inbound request, and the parent is responsible for =
delegating the requests to the child processes, and making sure that =
there are enough to handle the =
load.</div><div> </div><div>--Rich</div></body></html>=

--Apple-Mail-1--1026148743--

Rich Bowen [ Fr, 26 Februar 2010 14:35 ] [ ID #2033521 ]

Re: Apache newbie help - Multiple /usr/sbin/httpd2-preforks ...

On Feb 26, 2010, at 8:35 AM, Nilesh Govindarajan wrote:

> Prefork is always like that. It will spawn a process for each request.

Not exactly. It spawns processes ahead of time, and then manages the =
process pool within specified parameters. Saying that it spawns a =
process for each request somewhat misses the "pre" nature of "prefork", =
and also suggests that it will create processes forever, and destroy =
them once the request is over.

--Rich=

------------------------------------------------------------ ---------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
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Rich Bowen [ Fr, 26 Februar 2010 14:41 ] [ ID #2033522 ]