Fix no degub and info log generated after server started #3406 (#3476)

* fix log file not print bug
Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>

* alter changelog
Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>

* fix value
Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>
Co-authored-by: Nyangxuan <xuan.yang@zilliz.com>

CHANGELOG.md

@@ -29,6 +29,7 @@ Please mark all changes in change log and use the issue from GitHub
 -   \#2869 Create index failed with binary vectors
 -   \#2893 Insert binary data failed
 -   \#2957 There is no exisitence check of annoy search parameter
+-   \#3406 No debug and info log generated after server started
 -   \#3407 Server get stuck if create index after entities inserted with no manual flush
 
 ## Feature

core/src/log/LogMgr.cpp

@@ -240,7 +240,7 @@ LogMgr::parse_level(const std::string& level) {
 
 void
 LogMgr::set_level(el::Configurations& default_conf, el::Level level, bool enable, const std::string& log_path) {
-    default_conf.set(el::Level::Info, el::ConfigurationType::Filename, log_path.c_str());
+    default_conf.set(level, el::ConfigurationType::Filename, log_path.c_str());
     if (enable) {
         default_conf.set(level, el::ConfigurationType::Enabled, "true");
     } else {