[jira] [Assigned] (IOTDB-3852) Allows the total last cache value size to be limitaed

["Jialin Qiao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IOTDB-3852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jialin Qiao reassigned IOTDB-3852:
----------------------------------

    Assignee:     (was: Yongzao Dan)

> Allows the total last cache value size to be limitaed
> -----------------------------------------------------
>
>                 Key: IOTDB-3852
>                 URL: https://issues.apache.org/jira/browse/IOTDB-3852
>             Project: Apache IoTDB
>          Issue Type: Improvement
>          Components: Core/Cluster
>    Affects Versions: 0.13.1
>            Reporter: suchenglong
>            Priority: Critical
>
> 目前我们每创建一个新的物理量且插入数据后，如果开启了最新点缓存，每一时间序列都会在内存中缓存一个最新点的数据对象。当我持续新建了几千万的物理量并插入对应数据，内存中会存有几千万的最新点数据，占用了大量内存；是否可以有一种机制去限制这种线性增长，让它是一个可期望值。
> At present, every time we create a new physical quantity and insert data, if the latest point cache is enabled, each time sequence will cache a data object of the latest point in memory. When I continue to create tens of millions of physical quantities and insert corresponding data, tens of millions of latest data will be stored in the memory, occupying a large amount of memory. Can there be a mechanism to limit this linear growth, to make it an expected value.



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