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 oper-
ating 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, Passen-
ger will attempt to autodetect the Apache executable. If autode-
tection 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 https://www.phusionpassenger.com/documentation_and_sup-
port
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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