passenger-memory-stats(8) Administration Commands passenger-memory-stats(8)
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 us-
age 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 operat-
ing 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 autodetec-
tion 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 environ-
ment variable.
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@brightbox.co.uk> for
the Ubuntu project (but may be used by others).
Phusion Passenger 2.0 passenger-memory-stats(8)
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