Merge thread count is per shard. Closes #28518#29686

Merged

Sue-Gallagher merged 1 commit intoelastic:masterfrom Sue-Gallagher:MergeThreadCountIsPerShard28518

Apr 27, 2018

+2-1

Commits on Apr 26, 2018

[DOCS] Added 'on a single shard' to description of max_thread_count. Closes 28518
Sue-Gallagher
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