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Are you looking for a PHP answer? &nbsp;What is the exact information you want to capture?
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Are you looking for a PHP answer?  What is the exact information you want to capture?

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i want to capture time to serve the request in ms in custom log. I have added %{ms}T as below but does not work:<br />
%{%d/%b/%Y %T}t.%{msec_frac}t %{%z}t %h &nbsp;\&quot;%r\&quot; %b %{ms}T
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i want to capture time to serve the request in ms in custom log. I have added %{ms}T as below but does not work:
%{%d/%b/%Y %T}t.%{msec_frac}t %{%z}t %h  \"%r\" %b %{ms}T

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Hmm - that looks right to me. When you say it doesn't work, what do you mean - is it giving you a bad value, or no value at all? Did you restart the Apache service?
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Hmm - that looks right to me. When you say it doesn't work, what do you mean - is it giving you a bad value, or no value at all? Did you restart the Apache service?

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And also, are you making the change to the right log file? VirtualHosts can have their own log files, so if you don't change the right log...
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And also, are you making the change to the right log file? VirtualHosts can have their own log files, so if you don't change the right log...

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As per the mod_log_config 2.4 it says <br />
%{UNIT}T &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The time taken to serve the request, in a time unit given by UNIT. Valid units are ms for milliseconds, us for microseconds, and s for seconds. Using s gives the same result as %T without any format; using us gives the same result as %D. Combining %T with a unit is available in 2.4.13 and later.<br />
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I used %{ms}T to view the time in ms but did not work. <br />
%T i can view the time in sec but would like view the time in milliseconds.<br />
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Any suggestions would help.
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As per the mod_log_config 2.4 it says 
%{UNIT}T	The time taken to serve the request, in a time unit given by UNIT. Valid units are ms for milliseconds, us for microseconds, and s for seconds. Using s gives the same result as %T without any format; using us gives the same result as %D. Combining %T with a unit is available in 2.4.13 and later.

I used %{ms}T to view the time in ms but did not work. 
%T i can view the time in sec but would like view the time in milliseconds.

Any suggestions would help.

how to add time taken to serve the request in ms in apache log configuration?

The Apache HTTP Server is a secure, efficient and extensible server that provides HTTP services in sync with the current HTTP standards. Typically Apache is run on a Unix-like operating system, but it is available for a wide variety of operating systems, including Linux, Novell NetWare, Mac OS-X and Windows. Released under the Apache License, Apache is open-source software.

Apache Web Server

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Linux

A web server refers to the software that helps to deliver web content that can be accessed either through the Internet or through an intranet. The primary function of a web server is to store, process and deliver web pages to clients. The communication between client and server takes place using the Hypertext Transfer Protocol (HTTP). The most common use of web servers is to host websites, but there are other uses such as gaming, data storage, running enterprise applications, handling email, FTP, etc.

Web Servers

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.