DaweiLiu created IOTDB-1327:
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Summary: Query caching based on the latest data
Key: IOTDB-1327
URL: https://issues.apache.org/jira/browse/IOTDB-1327
Project: Apache IoTDB
Issue Type: Improvement
Components: Server
Reporter: DaweiLiu
After the current memtable is written to disk, the data is erased from memory.
If the time required for a query request happens to be the same as the time
needed to flush the memtable from disk, the Query engine will need to reload
the data from disk and cache the chunk read in memory.
It is more likely that the latest data in the time series data will be
retrieved by the user. Therefore, when the data in memtable is converted to
Chunk and flushed to disk, it is not necessary to erased the data in memory
directly. Instead, it is necessary to cache as much time as possible to reduce
disk read.
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