That does look like a bug. Can you create a ticket and upload a (preferably small-ish) sstable that illustrates the problem?
On Mon, May 24, 2010 at 12:07 PM, Ran Tavory <ran...@gmail.com> wrote: > I'd like to have 100% keys cached. Sorry if my example of Super2 wasn't > correct, but I do think there's a problem. Here's with my own data: > When using actual numbers (in this case for RowsCached) it works as > expected, however when specifying KeysCached="100%" I get only 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 > > On Mon, May 24, 2010 at 6:30 PM, Jonathan Ellis <jbel...@gmail.com> wrote: >> >> If you really want a cache capacity of 0 then you need to use 0 >> explicitly, otherwise the % versions will give you at least 1. >> >> On Mon, May 24, 2010 at 12:34 AM, Ran Tavory <ran...@gmail.com> wrote: >> > 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 >> > This looks weird... is this expected? (version 0.6.1) >> > For example, in the default configuration: >> > <ColumnFamily Name="Super2" >> > ColumnType="Super" >> > CompareWith="UTF8Type" >> > CompareSubcolumnsWith="UTF8Type" >> > RowsCached="10000" >> > KeysCached="50%"/> >> > >> > ---------------- >> > Keyspace: Keyspace1 >> > Read Count: 0 >> > Read Latency: NaN ms. >> > Write Count: 0 >> > Write Latency: NaN ms. >> > Pending Tasks: 0 >> > Column Family: Super1 >> > SSTable count: 0 >> > Space used (live): 0 >> > Space used (total): 0 >> > Memtable Columns Count: 0 >> > Memtable Data Size: 0 >> > Memtable Switch Count: 0 >> > Read Count: 0 >> > Read Latency: NaN ms. >> > Write Count: 0 >> > Write Latency: NaN ms. >> > Pending Tasks: 0 >> > Key cache capacity: 200000 >> > Key cache size: 0 >> > Key cache hit rate: NaN >> > Row cache: disabled >> > Compacted row minimum size: 0 >> > Compacted row maximum size: 0 >> > Compacted row mean size: 0 >> > Column Family: Super2 >> > SSTable count: 0 >> > Space used (live): 0 >> > Space used (total): 0 >> > Memtable Columns Count: 0 >> > Memtable Data Size: 0 >> > Memtable Switch Count: 0 >> > Read Count: 0 >> > Read Latency: NaN ms. >> > Write Count: 0 >> > Write Latency: NaN ms. >> > Pending Tasks: 0 >> > Key cache capacity: 1 >> > Key cache size: 0 >> > Key cache hit rate: NaN >> > Row cache capacity: 10000 >> > Row cache size: 0 >> > Row cache hit rate: NaN >> > Compacted row minimum size: 0 >> > Compacted row maximum size: 0 >> > Compacted row mean size: 0 >> > >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of Riptano, the source for professional Cassandra support >> http://riptano.com > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
