怎么回事：LFM没有按预期执行？

#创建ilm策略
PUT _ilm/policy/datastream_policy
{
  "policy": {
    "phases": {
      "hot": {
        "actions": {
          "rollover": {
            "max_size": "5MB",
            "max_age": "1d",
            "max_docs": 1
          }
        }
      },
      "delete": {
        "min_age": "90d",
        "actions": {
          "delete": {}
        }
      }
    }
  }
}
#创建索引模板
PUT _template/datastream_template
{
  "index_patterns": [
    "datastream-*"
  ],
  "settings": {
    "number_of_shards": 1,
    "number_of_replicas": 0,
    "index.lifecycle.name": "datastream_policy",
    "index.lifecycle.rollover_alias": "datastream"
  }
}
#初始化索引
PUT datastream-000001
{
  "aliases": {
    "datastream": {
      "is_write_index": true
    }
  }
}
#创建索引
PUT datastream/_mapping
{
  "properties": {
    "name": {
      "type": "text",
      "analyzer": "standard"
    }
  }
}
#创建文档
POST /_bulk
{ "index" : { "_index" : "datastream"} }
{"name":"zs1"}
{ "index" : { "_index" : "datastream"} }
{"name":"zs2"}
{ "index" : { "_index" : "datastream"} }
{"name":"zs3"}
{ "index" : { "_index" : "datastream"} }
{"name":"zs4"}

PUT _cluster/settings
{
  "transient": {
    "indices.lifecycle.poll_interval": "1m"
  }
}

// 伪代码
Timer:
if(文档总数量>策略设置数量) {
    create index
}