Hi, From the source code I can see that for each key, the hash (token), the key itself (ByteBuffer) and the position (long. offset in the sstable) are stored into the key cache. The hash is an MD5 hash, so it is 16 bytes. So, the total size required is at least 16+size-of(key)+4 which is > 20 bytes. If we consider the overhead of the object references, then it will be even larger. Then, why the wiki recommends multiplying the number of keys cached with 10-12 to get the memory requirement?
Thanks for any idea!
