src/terark/db/dfadb/nlt_store.cpp: limit sampleRatio to make dict size less than 2G
src/terark/db/dfadb/nlt_store.cpp: limit sampleRatio to make dict size less than 2G

Terark/terark-db,Terark/terark-db,Terark/terark-db,Terark/terark-db