man > passenger-memory-stats(8)

passenger-memory-stats(8)              Administration Commands             passenger-memory-stats(8)

NAME
       passenger-memory-stats  -  reports a snapshot of the Apache and Phusion Passenger memory sta‐
       tistcs

SYNOPSIS
       passenger-memory-stats

DESCRIPTION
       passenger-memory-stats allows you to easily analyze the real memory usage of Phusion  Passen‐
       ger and Apache.

       Process inspection tools such as ps and top are useful, but they rarely show the correct mem‐
       ory usage. The real memory usage is usually lower than what ps and top report.

       There  are  many  technical reasons why this is so, but an explanation is beyond the scope of
       this page. We refer the interested reader to operating systems literature about virtual  mem‐
       ory and copy-on-write.

       When  you run this tool the Private or private dirty RSS field shows the real memory usage of
       processes.

ENVIRONMENT VARIABLES
       HTTPD  The full filename to the Apache executable. By default, Passenger will attempt to  au‐
              todetect  the  Apache  executable.  If  autodetection  fails for whatever reason, then
              Apache processes will not be shown in the memory statistics. In  that  case,  you  may
              manually  specify  the  location to the Apache executable using this environment vari‐
              able.

SEE ALSO
       passenger-status(8), ps(1), top(1),

       User guide at https://www.phusionpassenger.com/documentation_and_support

AUTHOR
       Phusion Passenger is written by Phusion (http://www.phusion.nl)

       This manual page was written by Neil Wilson <neil AT brightbox.uk>  for  the  Ubuntu  project
       (but may be used by others).

Phusion Passenger                                2.0                       passenger-memory-stats(8)