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Posted to users@httpd.apache.org by Grant <em...@gmail.com> on 2007/09/29 18:45:30 UTC
[users@httpd] 127.0.0.1 access_log errors
I've been getting many errors like this in ssl_access_log:
127.0.0.1 - - [28/Sep/2007:09:07:29 -0700] "GET /" "-" "-" 400 470
and now access_log has started printing these:
127.0.0.1 - - [28/Sep/2007:03:10:07 -0700] "GET / HTTP/1.0" 404 24 "-"
"Apache (internal dummy connection)"
I read here:
http://www.linuxquestions.org/questions/showthread.php?t=506054
that the "internal dummy connection" is used by apache-2.2 to signal
its children to die, but the 404 and 400 are puzzling and why does the
ssl_access_log error not include a UA?
- Grant
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RE: [users@httpd] 127.0.0.1 access_log errors
Posted by Axel-Stéphane SMORGRAV <Ax...@europe.adp.com>.
I explicitly set it to 0 for all of my servers. Never had a problem.
In my mind setting it to anything different than zero would just be a temporary hack to circumvent a bug in some module, particularly memory leaks.
Various load tests I have made on Apache clearly show that restarting processes has a significant impact on Apache performance. You definitely do not want that to happen too often.
On the other hand you are using MPM prefork, so the impact may not be too severe... at least compared to what it would cost to fork new processes to handle load surges.
-ascs
-----Message d'origine-----
De : Grant [mailto:emailgrant@gmail.com]
Envoyé : dimanche 30 septembre 2007 00:35
À : users@httpd.apache.org
Objet : Re: [users@httpd] 127.0.0.1 access_log errors
> > Ok, thanks Joshua. Do these entries indicate that I might need to
> > make a change in my prefork settings? I'm currently using:
> >
> > StartServers 10
> > MinSpareServers 10
> > MaxSpareServers 20
> > MaxClients 256
> > MaxRequestsPerChild 100
>
> No, those log messages rarely indicate any problem at all. But your
> MaxRequestsPerChild setting is pretty-low if you are interested in
> performance.
Ok, would you use 0? I was concerned about a process going haywire eventually.
- Grant
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Re: [users@httpd] 127.0.0.1 access_log errors
Posted by "William A. Rowe, Jr." <wr...@rowe-clan.net>.
Grant wrote:
>
> Ok, would you use 0? I was concerned about a process going haywire eventually.
Whoa - there's zero reason to use MaxRequestsPerChild unless you encounter
a specific resource allocation/unbounded utilization flaw in a specific (or
mystery) module you've loaded.
In nearly ever other case MRPC does you no good, outside of wasting resources
itself it restarting a healthy server.
MRPC will not protect you from haywire processes, if they are going to crash
due to a bug, they will crash if you've wired in MRPC limits or not, and in
fact it's better to pick up the pieces after the process has served out it's
entire useful lifespan.
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Re: [users@httpd] 127.0.0.1 access_log errors
Posted by Grant <em...@gmail.com>.
> > Ok, thanks Joshua. Do these entries indicate that I might need to
> > make a change in my prefork settings? I'm currently using:
> >
> > StartServers 10
> > MinSpareServers 10
> > MaxSpareServers 20
> > MaxClients 256
> > MaxRequestsPerChild 100
>
> No, those log messages rarely indicate any problem at all. But your
> MaxRequestsPerChild setting is pretty-low if you are interested in
> performance.
Ok, would you use 0? I was concerned about a process going haywire eventually.
- Grant
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Re: [users@httpd] 127.0.0.1 access_log errors
Posted by Joshua Slive <jo...@slive.ca>.
On 9/29/07, Grant <em...@gmail.com> wrote:
> Ok, thanks Joshua. Do these entries indicate that I might need to
> make a change in my prefork settings? I'm currently using:
>
> StartServers 10
> MinSpareServers 10
> MaxSpareServers 20
> MaxClients 256
> MaxRequestsPerChild 100
No, those log messages rarely indicate any problem at all. But your
MaxRequestsPerChild setting is pretty-low if you are interested in
performance.
Joshua.
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Re: [users@httpd] 127.0.0.1 access_log errors
Posted by Grant <em...@gmail.com>.
> > I've been getting many errors like this in ssl_access_log:
> >
> > 127.0.0.1 - - [28/Sep/2007:09:07:29 -0700] "GET /" "-" "-" 400 470
> >
> > and now access_log has started printing these:
> >
> > 127.0.0.1 - - [28/Sep/2007:03:10:07 -0700] "GET / HTTP/1.0" 404 24 "-"
> > "Apache (internal dummy connection)"
> >
> > I read here:
> >
> > http://www.linuxquestions.org/questions/showthread.php?t=506054
> >
> > that the "internal dummy connection" is used by apache-2.2 to signal
> > its children to die, but the 404 and 400 are puzzling and why does the
> > ssl_access_log error not include a UA?
>
> See:
> http://wiki.apache.org/httpd/InternalDummyConnection
>
> 404 is because you don't have any content at the root of the default
> virtual host. 400 was because apache uses a non-ssl request, so if the
> default virtual host is ssl, the connection doesn't work properly.
> Neither of these is a problem. You can just ignore them.
Ok, thanks Joshua. Do these entries indicate that I might need to
make a change in my prefork settings? I'm currently using:
StartServers 10
MinSpareServers 10
MaxSpareServers 20
MaxClients 256
MaxRequestsPerChild 100
- Grant
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Re: [users@httpd] 127.0.0.1 access_log errors
Posted by Joshua Slive <jo...@slive.ca>.
On 9/29/07, Grant <em...@gmail.com> wrote:
> I've been getting many errors like this in ssl_access_log:
>
> 127.0.0.1 - - [28/Sep/2007:09:07:29 -0700] "GET /" "-" "-" 400 470
>
> and now access_log has started printing these:
>
> 127.0.0.1 - - [28/Sep/2007:03:10:07 -0700] "GET / HTTP/1.0" 404 24 "-"
> "Apache (internal dummy connection)"
>
> I read here:
>
> http://www.linuxquestions.org/questions/showthread.php?t=506054
>
> that the "internal dummy connection" is used by apache-2.2 to signal
> its children to die, but the 404 and 400 are puzzling and why does the
> ssl_access_log error not include a UA?
See:
http://wiki.apache.org/httpd/InternalDummyConnection
404 is because you don't have any content at the root of the default
virtual host. 400 was because apache uses a non-ssl request, so if the
default virtual host is ssl, the connection doesn't work properly.
Neither of these is a problem. You can just ignore them.
Joshua.
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