[CASSANDRA-1129] Using KeysCached="xx%" results in Key cache capacity: 1

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 0.6.3
• Severity: Low
• Assignee: Unassigned
• Reporter: Ran Tavory
• Created: 25/May/10 17:23
• Updated: 16/Apr/19 09:33
• Resolved: 01/Jun/10 19:26

Description

I don't know if this is a general bug or only something related to my instance, but for me (v0.6.1) I've noticed that when defining KeysCached="50%" (or KeysCached="100%" and I didn't test other values with %) then cfstats reports Key cache capacity: 1

<ColumnFamily CompareWith="BytesType" Name="KvAds"
KeysCached="100%"
RowsCached="10000"
/>

Column Family: KvAds
SSTable count: 7
Space used (live): 797535964
Space used (total): 797535964
Memtable Columns Count: 42292
Memtable Data Size: 10514176
Memtable Switch Count: 24
Read Count: 2563704
Read Latency: 4.590 ms.
Write Count: 1963804
Write Latency: 0.025 ms.
Pending Tasks: 0
Key cache capacity: 1
Key cache size: 1
Key cache hit rate: 0.0
Row cache capacity: 10000
Row cache size: 10000
Row cache hit rate: 0.2206178354382234
Compacted row minimum size: 386
Compacted row maximum size: 9808
Compacted row mean size: 616

I'll attach one of the sstable files from this CF