ethdb/pebble: switch to increasing level sizes (ethereum#30602)

Author: karalabe

ethdb/pebble/pebble.go

@@ -213,12 +213,12 @@ func New(file string, cache int, handles int, namespace string, readonly bool, e
 		// options for the last level are used for all subsequent levels.
 		Levels: []pebble.LevelOptions{
 			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
-			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
-			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
-			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
-			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
-			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
-			{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+			{TargetFileSize: 4 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+			{TargetFileSize: 8 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+			{TargetFileSize: 16 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+			{TargetFileSize: 32 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+			{TargetFileSize: 64 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+			{TargetFileSize: 128 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
 		},
 		ReadOnly: readonly,
 		EventListener: &pebble.EventListener{