[CASSANDRA-8639] Can OOM on CL replay with dense mutations

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.2
• Component/s: Legacy/Local Write-Read Paths
• Assignee: Ariel Weisberg
• Reporter: T Jake Luciani

Authors

Ariel Weisberg

Reviewers

T Jake Luciani

• Created: 16/Jan/15 19:48
• Updated: 16/Apr/19 09:31
• Resolved: 04/Dec/15 16:51

Description

If you write dense mutations with many clustering keys, the replay of the CL can quickly overwhelm a node on startup. This looks to be caused by the fact we only ensure there are 1000 mutations in flight at a time. but those mutations could have thousands of cells in them.

A better approach would be to limit the CL replay to the amount of memory in flight using cell.unsharedHeapSize()