[CASSANDRA-5661] Discard pooled readers for cold data

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0.1
• Severity: Normal
• Assignee: Pavel Yaskevich
• Reporter: Jonathan Ellis

Authors

Pavel Yaskevich

Reviewers

Jonathan Ellis

• Tester: Daniel Meyer
• Created: 19/Jun/13 13:31
• Updated: 16/Apr/19 09:32
• Resolved: 17/Sep/13 21:58

Description

Reader pooling was introduced in CASSANDRA-4942 but pooled RandomAccessReaders are never cleaned up until the SSTableReader is closed. So memory use is "the worst case simultaneous RAR we had open for this file, forever."

We should introduce a global limit on how much memory to use for RAR, and evict old ones.

Issue Links

• is duplicated by: CASSANDRA-6191 Add a warning for small sstable size setting in LCS