[CASSANDRA-6726] Recycle CompressedRandomAccessReader/RandomAccessReader buffers independently of their owners, and move them off-heap when possible

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Won't Fix
• Fix Version/s: 2.2.0 beta 1
• Labels: performance
• Assignee: Branimir Lambov
• Reporter: Benedict Elliott Smith

Authors

Branimir Lambov

Reviewers

Benedict Elliott Smith

• Created: 19/Feb/14 00:37
• Updated: 16/Apr/19 09:31
• Resolved: 13/Sep/14 11:26

Description

Whilst CRAR and RAR are pooled, we could and probably should pool the buffers independently, so that they are not tied to a specific sstable. It may be possible to move the RAR buffer off-heap, and the CRAR sometimes (e.g. Snappy may possibly support off-heap buffers)

Issue Links

• is related to: CASSANDRA-7039 DirectByteBuffer compatible LZ4 methods
• is superceded by: CASSANDRA-5863 In process (uncompressed) page cache