CompactionTableSizeMultiplier of leveldb use default value. #2325

To improve performance of leveldb find key in condition of large directory(millions of files) which use uuid as filename.

weed/filer/leveldb2/leveldb2_store.go

@@ -46,10 +46,9 @@ func (store *LevelDB2Store) initialize(dir string, dbCount int) (err error) {
 	}
 
 	opts := &opt.Options{
-		BlockCacheCapacity:            32 * 1024 * 1024, // default value is 8MiB
-		WriteBuffer:                   16 * 1024 * 1024, // default value is 4MiB
-		CompactionTableSizeMultiplier: 4,
-		Filter:                        filter.NewBloomFilter(8), // false positive rate 0.02
+		BlockCacheCapacity: 32 * 1024 * 1024,         // default value is 8MiB
+		WriteBuffer:        16 * 1024 * 1024,         // default value is 4MiB
+		Filter:             filter.NewBloomFilter(8), // false positive rate 0.02
 	}
 
 	for d := 0; d < dbCount; d++ {