原文链接 : https://www.elastic.co/guide/en/elasticsearch/reference/5.0/cat-thread-pool.html
译文链接 : http://www.apache.wiki/display/Elasticsearch/cat+thread+pool
贡献者 : [那伊抹微笑]
thread_pool 命令展示了集群中每一个节点的线程池的统计信息。默认情况下返回所有线程池的 actinve(活跃的),queue(队列中的)和 reject(拒绝的)的统计信息。
% curl 192.168.56.10:9200/_cat/thread_pool
0EWUhXe bulk 0 0 0
0EWUhXe fetch_shard_started 0 0 0
0EWUhXe fetch_shard_store 0 0 0
0EWUhXe flush 0 0 0
0EWUhXe force_merge 0 0 0
0EWUhXe generic 0 0 0
0EWUhXe get 0 0 0
0EWUhXe index 0 0 0
0EWUhXe listener 0 0 0
0EWUhXe management 1 0 0
0EWUhXe refresh 0 0 0
0EWUhXe search 0 0 0
0EWUhXe snapshot 0 0 0
0EWUhXe warmer 0 0 0
第一列是节点名
node_name
0EWUhXe
第二列是线程池名
name
bulk
fetch_shard_started
fetch_shard_store
flush
force_merge
generic
get
index
listener
management
refresh
search
snapshot
warmer
接下来的三列是所有线程池的 actinve(活跃的),queue(队列中的)和 reject(拒绝的)的统计信息。
active queue rejected
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
1 0 0
0 0 0
0 0 0
0 0 0
0 0 0
该 cat thread pool API 接受一个 **thread_pool_patterns
**URL 参数,该参数指定一个逗号分隔的正则表达式列表以匹配线程池名称。
% curl 'localhost:9200/_cat/thread_pool/generic?v&h=id,name,active,rejected,completed'
id name active rejected completed
0EWUhXeBQtaVGlexUeVwMg generic 0 0 70
在这里,建议线程池的统计信息展示 host,active,rejected 和 completed 列。
所有 built-in thread pools 和自定义的线程池都是可用的。
对于每个线程池来说,您可以通过使用表哥中的字段名来获得详细说明。
Field Name(字段名) | Alias(别名) | Description(描述) |
---|---|---|
type | t | The current (*) type of thread pool (fixed or scaling ) |
active | a | The number of active threads in the current thread pool |
size | s | The number of threads in the current thread pool |
queue | q | The number of tasks in the queue for the current thread pool |
queue_size | qs | The maximum number of tasks permitted in the queue for the current thread pool |
rejected | r | The number of tasks rejected by the thread pool executor |
largest | l | The highest number of active threads in the current thread pool |
completed | c | The number of tasks completed by the thread pool executor |
min | mi | The configured minimum number of active threads allowed in the current thread pool |
max | ma | The configured maximum number of active threads allowed in the current thread pool |
keep_alive | k | The configured keep alive time for threads |
除了每个线程池的详细说明之外,它也可以方便理解线程池的内部。同样的,您可以请求响应的节点的其它详细说明。(例如 ip)
Field Name(字段名) | Alias(别名) | Description(描述) |
---|---|---|
node_id | id | The unique node ID |
ephemeral_id | eid | The ephemeral node ID |
pid | p | The process ID of the running node |
host | h | The hostname for the current node |
ip | i | The IP address for the current node |
port | po | The bound transport port for the current node |
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