ElasticSearch的缓存清除策略都有哪些

可以登录Kibana控制台，执行如下命令清理缓存：

● 清除特定索引的缓存：POST /<索引名>/_cache/clear?fielddata=true

● 清除所有缓存：POST /_cache/clear

主要有下面三种清缓存方式 1.清空全部缓存

curl localhost:9200/_cache/clear?pretty
{
"_shards" : {
"total" : 72,
"successful" : 72,
"failed" : 0
}
}

2.清除单一索引缓存

curl localhost:9200/index/_cache/clear?pretty
{
"_shards" : {
"total" : 2,
"successful" : 2,
"failed" : 0
}
}

3.清除多索引缓存

curl localhost:9200/index1,index2,index3/_cache/clear?pretty
{
"_shards" : {
"total" : 12,
"successful" : 12,
"failed" : 0
}
}