[HBASE-26900] Pooled and reuse scanner lease

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0-alpha-2, 2.4.11
• Component/s: scan
• Assignee: Xiaolin Ha
• Reporter: Xiaolin Ha
• Created: 29/Mar/22 10:41
• Updated: 29/Mar/22 10:42

Description

We can make the scanner lease be pooled and reuse them to reduce the GC pressure,

e.g. when there are large concurrent scans for the meta table, many new leases can be avoid to create.