在执行事物时都会产生如下DEBUG这是要干嘛呢？

[南宫封涯]

DEBUG - Bound value [org.springframework.jdbc.datasource.ConnectionHolder@262b9ff2] for key [{ CreateTime:"2019-06-28 15:31:40", ActiveCount:1, PoolingCount:3, CreateCount:4, DestroyCount:0, CloseCount:397, ConnectCount:398, Connections:[ {ID:809297153, ConnectTime:"2019-06-28 15:31:40", UseCount:175, LastActiveTime:"2019-06-28 15:40:53"", CachedStatementCount:20}, {ID:422248734, ConnectTime:"2019-06-28 15:32:48", UseCount:13, LastActiveTime:"2019-06-28 15:50:29"", CachedStatementCount:5}, {ID:58221556, ConnectTime:"2019-06-28 15:32:50", UseCount:30, LastActiveTime:"2019-06-28 15:50:46"", CachedStatementCount:16} ] }