ba6641afac
Fixes bug 1262571 Previously, the mongodb storage driver an aggregation pipeline over the meter collection in order to construct a list of resources adorned with first & last sample timestamps etc. However mongodb aggregation framework performs sorting in-memory, in this case operating over a potentially very large collection. It is also hardcoded to abort any sorts in an aggregation pipeline that will consume more than 10% of physical memory, which is observed in this case. Now, we avoid the aggregation framework altogether and instead use an equivalent map-reduce. Change-Id: Ibef4a95acada411af385ff75ccb36c5724068b59
ceilometer
See the ReleaseNotes document and the project home for more info.