More insight for this sstable: the ArrayList for IndexSummary has 644195
entries, so total number of entries for this sstable is: 644195*128=~82mil.
The problem is that the total bits for its BloomFilter (long[19400551]
inside BitSet) is 19400551*64=1241635264, which means each key is taking
~15bit
BloomFilter is not redundant, because it stores information about
_all_ keys while the index summary stores every 1/128 key.
On Tue, May 4, 2010 at 3:47 PM, Weijun Li wrote:
> Hello,
>
> We stored about 47mil keys in one Cassandra node and what a memory dump
> shows for one of the SStableReader:
