[CASSANDRA-5538] Reduce Empty Map allocations in StorageProxy.sendToHintedEndpoints

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 2.0 beta 1
• Assignee: David Brosius
• Reporter: David Brosius

Authors

David Brosius

Reviewers

Jonathan Ellis

• Created: 06/May/13 06:24
• Updated: 16/Apr/19 09:32
• Resolved: 31/May/13 01:10

Description

StorageProxy.sendToHintedEndpoints allocates HashMaps consistently that are very often not used.

See output: http://pastebin.com/jEaBxz1h

Format is
Type Date SourceLine CollectionSize NumBuckets NumBucketsUsed

The snapshot is taken after the size of the collection hasn't changed for 5 seconds.

Postpone creation of hashmap until you need it.