NAME

       passenger-memory-stats  -  reports  a  snapshot of the Apache and Phusion Passenger memory
       statistcs

SYNOPSIS

       passenger-memory-stats

DESCRIPTION

       passenger-memory-stats allows you to easily analyze  the  real  memory  usage  of  Phusion
       Passenger and Apache.

       Process  inspection  tools such as ps and top are useful, but they rarely show the correct
       memory 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
       memory 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
              autodetect 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
              variable.

SEE ALSO

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

       User guide at http://www.modrails.com/documentation.html

AUTHOR

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

       "Phusion" and "Phusion Passenger" are trademarks of Hongli Lai & Ninh Bui.

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