Elastic search stats shows peak thread usage

Hi Team,

We are observing the thread consumption is very high in elastic search but
we are not able to find root cause. Below are the threads count from
elastic stats. Can any one provide inputs why it is consuming more threads.

"threads":{"count":67,"peak_count":70},"gc":{"collectors":{"young":{"collection_count":156,"collection_time_in_millis":18542},"old":{"collection_count":2,"collection_time_in_millis":157}}},"buffer_pools":{"direct":{"count":64,"used_in_bytes":92589081,"total_capacity_in_bytes":92589081},"mapped":{"count":610,"used_in_bytes":145534127835,"total_capacity_in_bytes":145534127835}}},"thread_pool":{"generic":{"threads":1,"queue":0,"active":0,"rejected":0,"largest":14,"completed":7629},"index":{"threads":0,"queue":0,"active":0,"rejected":0,"largest":0,"completed":0},"get":{"threads":0,"queue":0,"active":0,"rejected":0,"largest":0,"completed":0},"snapshot":{"threads":1,"queue":0,"active":0,"rejected":0,"largest":2,"completed":27},"merge":{"threads":1,"queue":0,"active":0,"rejected":0,"largest":1,"completed":39},"suggest":{"threads":0,"queue":0,"active":0,"rejected":0,"largest":0,"completed":0},"bulk":{"threads":4,"queue":0,"active":0,"rejected":0,"largest":4,"completed":29},"optimize":{"threads":0,"queue":0,"active":0,"rejected":0,"largest":0,"completed":0},"warmer":{"threads":1,"queue":0,"active":0,"rejected":0,"largest":2,"completed":102},"flush":{"threads":1,"queue":0,"active":0,"rejected":0,"largest":1,"completed":23},"search":{"threads":12,"queue":0,"active":0,"rejected":0,"largest":12,"completed":3521},"percolate":{"threads":0,"queue":0,"active":0,"rejected":0,"largest":0,"completed":0},"management":{"threads":5,"queue":0,"active":1,"rejected":0,"largest":5,"completed":738385},"refresh":{"threads":1,"queue":0,"active":0,"rejected":0,"largest":2,"completed":35}}

Advance thanks ...

Thanks,
Srikanth.

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