leveldb: don't compute last level compaction score
The last level can't be compacted.
diff --git a/leveldb/version.go b/leveldb/version.go
index 011d982..7227de2 100644
--- a/leveldb/version.go
+++ b/leveldb/version.go
@@ -130,7 +130,7 @@
err = ErrNotFound
- // Since entries never hope across level, finding key/value
+ // Since entries never hop across level, finding key/value
// in smaller level make later levels irrelevant.
v.walkOverlapping(ikey, func(level int, t *tFile) bool {
if !tseek {
@@ -323,7 +323,8 @@
var bestLevel int = -1
var bestScore float64 = -1
- for level, tables := range v.tables {
+ // Last level can't be compacted, so exclude from calculation.
+ for level, tables := range v.tables[:len(v.tables)-1] {
var score float64
if level == 0 {
// We treat level-0 specially by bounding the number of files
