[CASSANDRA-17787] Full repair on a keyspace with a large amount of tables causes OOM

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Duplicate
• Component/s: Consistency/Repair
• Labels: lhf
• Bug Category: Degradation - Performance Bug/Regression
• Severity: Normal
• Complexity: Normal
• Discovered By: User Report
• Platform: All
• Assignee: Unassigned
• Reporter: Brandon Williams
• Created: 29/Jul/22 20:47
• Updated: 08/Feb/24 16:02
• Resolved: 08/Feb/24 16:02

Description

Running a nodetool repair -pr --full on a keyspace with a few hundred tables will cause a direct memory OOM, or lots of heap pressure with use_offheap_merkle_trees: false. Adjusting repair_session_space_in_mb does not seem to help. From an initial look at a heap dump, it appears to node is holding many remote trees in memory.

Issue Links

• duplicates: CASSANDRA-19336 Repair causes out of memory
• relates to: CASSANDRA-19336 Repair causes out of memory