[CASSANDRA-5377] MemoryMeter miscalculating memtable live ratio

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 1.2.12
• Severity: Low
• Assignee: Jonathan Ellis
• Reporter: Ahmed Bashir

Authors

Jonathan Ellis

• Created: 22/Mar/13 16:02
• Updated: 16/Apr/19 09:32
• Resolved: 19/Nov/13 22:32

Description

I've noticed the following logs in our running cluster:
WARN [MemoryMeter:1] 2013-03-17 23:15:55,876 Memtable.java (line 197) setting live ratio to minimum of 1.0 instead of 0.6378445488771007

It seems odd for the deep size calculation to be smaller than the aggregate sum of serialized columns. Perhaps it's because we're mutating on a bunch of existing columns, or perhaps there's some miscalculation somewhere

Our column families all have regular columns (no super columns, expiring columns, etc)