Overview
--------

"Pl_mom cleans up your mess" by resetting slices that are using up too
much memory, and by rebooting the machine once the swap space is
nearly full.

Specifically, pl_mom takes the following actions based on the amount
of consumed swap space:

* at 85% full, pl_mom starts logging the available swap space to
  syslogd

* at 90% full, pl_mom resets the slice that is consuming the most
  physical memory and sends an alert mail to that slice and the pl-mom
  alias 

* at 95% full, pl_mom reboots the machine and sends mail to the pl-mom
  alias

Pl_mom is organized as two processes.  The reboot process runs every
second, and the slice reset process runs every 30 seconds.  The reboot
process is very lightweight and only reads /proc/swaps.  However, the
slice reset process may pull data from the slicestat sensor on port
3100, which can potentially take a long time (on the order of minutes
if there are thousands of processes on the machine).


Building
---------

Rename the parent directory from pl_mom to pl_mom-0.2 (or whatever is
the appropriate version number listed in the Makefile).  Then "make
rpm" should do it.


Notes
------