Werk #8402: Improved CMC performance when handling plenty of downtimes

Component	The Checkmk Micro Core
Title	Improved CMC performance when handling plenty of downtimes
Date	Jan 19, 2016
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i4 Checkmk Pro, Checkmk Ultimate MT

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