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https://issues.apache.org/jira/browse/CASSANDRA-1129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jon Hermes updated CASSANDRA-1129:
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Comment: was deleted
(was: (I didn't catch the failures because I had run CompactionsTest instead of
CompactionsPurgeTest by accident.)
This test wasn't intended to guarantee the math in estimating keys works, only
to show that flushing and compaction affect the keyCacheSize dynamically.
The number of keys in the indexSummary has been changed in trunk in some way
that I'm not seeing immediately.)
> Using KeysCached="xx%" results in Key cache capacity: 1
> -------------------------------------------------------
>
> Key: CASSANDRA-1129
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1129
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.6.1
> Reporter: Ran Tavory
> Priority: Minor
> Fix For: 0.6.3
>
> Attachments: 0001-CASSANDRA1129.patch, 0002-CASSANDRA1129.patch,
> 0003-CASSANDRA1129.patch, KvAds-84.zip, TOTRUNK-2-CASSANDRA1129.patch,
> TOTRUNK-CASSANDRA1129.patch
>
>
> 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
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