03-04-2011
Hi,
from this output, I would only recommend to add 20 GB memory and your paging will stop. From your stats you are using close to 100% memory computational - no wonder that your box is paging - and yes this will for sure be DB content as well ... and if your DBAs are doing rman backups on top it becomes real bad.
What you could try is mount your oracle filesystems with noatime option and switch oracle to setall - this will give you more free memory into your free list and may reduce your memory footprint.
Regards
zxmaus
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LEARN ABOUT DEBIAN
passenger-memory-stats
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 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).
Phusion Passenger 2.0 passenger-memory-stats(8)