Merge pull request #17 from cydrain/0.5.0

#9 change default gpu_cache_capacity to 4

Former-commit-id: 73a9e51bb2b8fe4f5a7b7cc5648c5cafd73585d4

CHANGELOG.md

@@ -26,6 +26,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-653 - When config check fail, Milvus close without message
 - MS-654 - Describe index timeout when building index
 - MS-658 - Fix SQ8 Hybrid can't search
+- #9 Change default gpu_cache_capacity to 4
 
 ## Improvement
 - MS-552 - Add and change the easylogging library