[IOTDB-2065] TsFileSequenceReader will be cached for 100s even no longer used

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.4
• Labels: pull-request-available
• Sprint: 2021-11-Tian
• Assignee: Alima777
• Reporter: Jialin Qiao
• Created: 26/Nov/21 07:47
• Updated: 27/Nov/21 02:02
• Resolved: 27/Nov/21 02:02

Description

In FileReaderManager, we cached all opened TsFileSequenceReader and maintain an usage count for each reader.

We register a timed thread (cacheFileReaderClearPeriod=100s) to check if a reader is no longer used.

We could check and release the reader when we decrease its usage count in endQuery.

Issue Links

• links to: GitHub Pull Request #4478
• links to: GitHub Pull Request #4481