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Posted to users@httpd.apache.org by ma...@manfbraun.de on 2010/12/01 19:38:43 UTC
[users@httpd] Want more info about logging works
Hello !
I am just using this to log:
LogFormat \
"%{%F %T}t\t%v\t%p\t%h\t%{User-Agent} ... \
vhost_combined2
CustomLog "|/usr/bin/mono /test/eco.exe /var/log/apache2/extra_log 86400" \
vhost_combined2
May I use just a named pipe? What will happen, it the reader has a short
"dropout", is there a buffer and if not, would apache continue to log
to that pipe later?
If I use only one [global] logging directive, would all instances
really use this one log?
Because the timestamp does not contain milliseconds, how can I
determine, which request was the first? Would it help me, just
to subtract the processing-time?
It would really help me to understand, how the logging
is really working!
Thanks a lot!
br++mabra
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Re: [users@httpd] Want more info about logging works
Posted by Jeroen Geilman <je...@adaptr.nl>.
On 12/01/2010 07:38 PM, mabra@manfbraun.de wrote:
> Hello !
>
> I am just using this to log:
>
> LogFormat \
> "%{%F %T}t\t%v\t%p\t%h\t%{User-Agent} ... \
> vhost_combined2
>
> CustomLog "|/usr/bin/mono /test/eco.exe /var/log/apache2/extra_log 86400" \
> vhost_combined2
>
Okay.
> May I use just a named pipe?
You may log to any target the CustomLog documentation says is supported.
> What will happen, it the reader has a short
> "dropout", is there a buffer and if not, would apache continue to log
> to that pipe later?
>
If the logging process is interrupted for any reason, apache can
obviously not guarantee logging.
> If I use only one [global] logging directive, would all instances
> really use this one log?
>
Yes.
> Because the timestamp does not contain milliseconds, how can I
> determine, which request was the first? Would it help me, just
> to subtract the processing-time?
>
Probably not.
Use a logging mechanism that records milli- or microseconds if you need
that.
The apache log contains the time of *completion* for the entire request,
not the start time.
> It would really help me to understand, how the logging
> is really working!
>
It's well documented at http://httpd.apache.org/docs/current/logs.html
--
J.
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