Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1462350

Description of problem:

When you have a large number of host groups, and a large number of associated puppet classes, searching for hostgroups via the UI or api can cause a huge spike of memory if the search is unqualified (i.e. does not include 'field=value', but instead is just 'value').

Version-Release number of selected component (if applicable):
6.2.9/6.3.0

How reproducible:
Always (with user data)

Steps to Reproduce:
1. On a system with lots of hostgroups and puppet class associations
2. Navigate to config > hostgroups
3. search for "FOO" where FOO is the name of a hostgroup

Actual results:
Passenger memory balloons by many gigs, OOM killer may kick in

Expected results:
No major memory usage increase

Additional info: