[master] fix mem performance

Author: Jimmy-Xu

performance/perf-on-softlayer.md

@@ -84,12 +84,12 @@ The following table is the result of sysbench memory performance test.
 
 | Target | num-threads |  rnd-read(MB/sec) | rnd-write(MB/sec) | seq-read(MB/sec) | seq-write(MB/sec) |
 | --- | --- | --- |--- |--- |--- |
-| Host | 1 | 11497 | 11489 | 11487 | 11513 | 11496 |
-| Docker | 1 | 11494 | 11491 | 11494 | 11505 | 11496 |
-| Hyper | 1 | 11417 | 11439 | 11418 | 11419 | 11423 |
-| Host | 2 |22926 | 22835 | 22694 | 22770 | 22806 |
-| Docker | 2 | 22593 | 22828 | 22629 | 22900 | 22737 |
-| Hyper | 2 | 22608 | 22647 | 22737 | 22741 | 22683 |
+| Host | 1 | 11497 | 11489 | 11487 | 11513 |
+| Docker | 1 | 11494 | 11491 | 11494 | 11505 |
+| Hyper | 1 | 11417 | 11439 | 11418 | 11419 |
+| Host | 2 |22926 | 22835 | 22694 | 22770 |
+| Docker | 2 | 22593 | 22828 | 22629 | 22900 |
+| Hyper | 2 | 22608 | 22647 | 22737 | 22741 |