92379ca9af
This adds back usage stats by pickybacking on the watcher stats, which are already running distributed in order to collect and merge watcher statistics. In order to be able to track statistics, we need to add information for each watch in an in-memory data structure that is processed whenever a usage request is coming in. This processing creates a number of counters for each node, which then are merged together in the usage stats. relates elastic/x-pack-elasticsearch#4071 Original commit: elastic/x-pack-elasticsearch@c8bfed288f |
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