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Full Discussion: Some trace file to track timings of a process
Top Forums UNIX for Beginners Questions & Answers Some trace file to track timings of a process Post 303029786 by Neo on Friday 1st of February 2019 12:17:27 AM
Old 02-01-2019
Quote:
Originally Posted by saraperu
Here from server1, I will issue URL link which will go to web server, app server, db server to retrieve the requested data as output
This is quite standard, obviously.

This server at unix.com works exactly the same way, as do most web servers.

You should start with a good web dev tool like the one in your browser which is designed to show you the timing in a water fall manner.

You can easily insert some testing code, like some Javascript, in the mix to help you drill down further.

If your backend server is slow, you need to move to the server and look at the system performance as a whole.

If you have any modern day, decent, back-end server, the bottleneck is often in the page rendering on the web site (too many big files, large javascript libs, etc.)

There is not one single tool which will do the entire process from user at the browser to the database.

You must first isolate the problem, normally with a web dev tool in a browser, and then drill down.
 

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LEARN ABOUT MOJAVE

jstack

jstack(1)						      General Commands Manual							 jstack(1)

NAME

       jstack - stack trace

SYNOPSIS

       jstack [ option ] pid
       jstack [ option ] executable core
       jstack [ option ] [server-id@]remote-hostname-or-IP

DESCRIPTION

       jstack  prints  Java  stack traces of Java threads for a given Java process or core file or a remote debug server. For each Java frame, the
       full class name, method name, 'bci' (byte code index) and line number, if available, are printed. With the -m option,  jstack  prints  both
       Java  and  native frames of all threads along with the 'pc' (program counter). For each native frame, the closest native symbol to 'pc', if
       available, is printed. C++ mangled names are not demangled. To demangle C++ names, the output of this command may be piped to c++filt.

       NOTE - This utility is unsupported and may or may not be available in future versions of the J2SE SDK.  jstack is not  currently  available
       on Windows platforms or on the Linux Itanium platform.

PARAMETERS

       Options are mutually exclusive. Option, if used, should follow immediately after the command name.

       pid	      process  id  for which the stacktrace is to be printed.  The process must be a Java process. To get a list of Java processes
		      running on a machine, jps may be used.

       executable     Java executable from which the core dump was produced.

       core	      core file for which the stack trace is to be printed.

       remote-hostname-or-IP
		      remote debug server's (see jsadebugd) hostname or IP address.

       server-id      optional unique id, if multiple debug servers are running on the same remote host.

OPTIONS

       -m	      prints mixed mode (both Java and native C/C++ frames) stack trace.

       -h	      Prints a help message.

       -help	      Prints a help message.

SEE ALSO

       pstack(1) c++filt(1) jps(1) jsadebugd(1)

KNOWN BUGS

       Mixed mode stack trace, the -m option, does not work with the remote debug server.

								   13 June 2004 							 jstack(1)
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