elasticsearch thread pool

http://www.elastic.co/guide/en/elasticsearch/reference/1.x/modules-threadpool.html

node는 thread memory consumption의 관리를 위해 several thread pools을 가진다.

이 pool들은 queues를 가지고, request를 폐기하는대신 대기할 수 있다.

index : fixed # of available processors, queue_size of 200

search : fixed 3x # of available processors, queue_size of 1000

suggest :  fixed # of available processors, queue_size of 1000

get : fixed # of available processors, queue_size of 1000

bulk : fixed # of available processors, queue_size of 50

precolate : fixed # of available processors, queue_size of 1000

snapshot : scaling, keep-alive 5m with a size of (# of available processors)/2

warmer : scaling with a 5m keep-alive

refresh : scaling with a 5m keep-alive

listener : (# of available processors)/2, max at 10

* cluster update settings를 통해 thread pool의 값들을 변경할 수 있음

thread pool types

cache : unbounded thread pool, 요청에 따라 pending 됨

threadpool:

    index:

        type: cached

fixed : fixed size, handle thre request with a queue

threadpool:

    index:

        type: fixed

        size: 30

        queue_size: 1000

개인 목적으로 공식 문서를 번역했습니다.

틀린 부분이 있을수도 있습니다.