[CASSANDRA-5746] HHOM.countPendingHints is a trap for the unwary

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0 beta 2
• Component/s: Legacy/Tools
• Severity: Normal
• Assignee: Tom Hobbs
• Reporter: Jonathan Ellis

Authors

Tom Hobbs

Reviewers

Jonathan Ellis

• Created: 10/Jul/13 22:54
• Updated: 16/Apr/19 09:32
• Resolved: 18/Jul/13 20:27

Description

countPendingHints can OOM the server fairly easily since it does a per-target seq scan without paging.

More generally, countPendingHints is far too slow to be useful for routine monitoring.