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From Rainer Jung <rainer.j...@kippdata.de>
Subject Re: Enhanced error log format for trunk?
Date Mon, 07 Jun 2010 20:26:33 GMT
On 01.06.2010 14:56, Rainer Jung wrote:
> I repeatedly inserted millisecond or microsecond timestamps as well as
> PID and thread ID information into the ErrorLog when trying to diagnose
> problems, most often in combination with additional log lines.
>
> Due to the increased load and capability of systems and increasing
> amount of concurrency, would those features be interesting by default?
>
> 1) Sub-second timestamps in error log

Committed as r952203.

> 2) PID and thread ID

> PID and thread id are useful, because the can be correlated with the
> access_log (when added there). they also help to understand, which
> messages belong "together" when multiple log events are intertwined.

Committed as r952201.

> 3) Related things for access log
>
> There's a related open Bugzilla about adding sub-second timestamps (not:
> duration) to the access log (BZ 49251). The OP suggests to use %M for an
> absolute timestamp. It would be nice to improve the strftime use of
> %{format}t to allow for a proprietary microsecond letter which will add
> the microsecond part of the actual time. I found no standards defined
> for that.

Any comments on my patch at:

http://people.apache.org/~rjung/patches/httpd-trunk-adding-milliseconds-and-microseconds-to-the-access-log.patch

It extends the patterns used by %{...}t. More detailed explanations at 
the beginning of the patch.

Rainer

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