Liu-XinYuan commented on issue #4236: Optimize the elasticsearch-based query interface provided to UI URL: https://github.com/apache/skywalking/pull/4236#issuecomment-574965601 TTL and index positioning have these differences: 1.ttl is an internal timing task. It traverses all models, calculates s according to the predefined index retention time, then deletes the lower boundary of the index, and calculates the upper boundary according to the current time. Then delete the index outside this interval. Only the two parameters of downsampling (carried in the modle) and the defined data ttl time are needed here. 2. Index positioning needs to calculate the interval within a user-defined time. The user-defined time will be converted into other forms in the query-graphql-plugin. I must unify the time form in order to use it in index positioning.
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