xiangdong Huang created IOTDB-178:
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Summary: 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
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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