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Posted to dev@iotdb.apache.org by "xiangdong Huang (Jira)" <ji...@apache.org> on 2019/11/01 07:08:00 UTC

[jira] [Closed] (IOTDB-178) Cache hit Rate statistics

     [ https://issues.apache.org/jira/browse/IOTDB-178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

xiangdong Huang closed IOTDB-178.
---------------------------------
    Resolution: Fixed

> Cache hit Rate statistics 
> --------------------------
>
>                 Key: IOTDB-178
>                 URL: https://issues.apache.org/jira/browse/IOTDB-178
>             Project: Apache IoTDB
>          Issue Type: New Feature
>            Reporter: xiangdong Huang
>            Priority: Major
>
> As there are several cache structures in IoTDB for supporting fast querying, it is good if we can get the cache hit rate.
> The data can help us improving the query process of IoTDB.
>  
> Currently, the caches are (According to [~Lei Rui] 's analysis):
>  * TsFileMetaDataCache
>  * DeviceMetadtaCache
>  * FileReaderManager.closedFileReaderMap 
>  * ChunkLoader.chunkCache
>  



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