TNSPING time out/響應慢，tnspingout

TNSPING time out/響應慢，tnspingout

E:\s01\app\oracle\product\11.2.0\dbhome_1\BIN>tnsping CENORCLTNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 25-MAY-2015 10:26:59Copyright (c) 1997, 2010, Oracle.  All rights reserved.Used parameter files:e:\s01\app\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.oraUsed TNSNAMES adapter to resolve the aliasAttempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = W01SQL0601.pharmatechs.com)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = cenorcl)))OK (266310 msec)

查了些資料後發現是listener.log超過4G就會出現這個問題，解決很簡單。
lsnnrctl stop
刪除listener.log
lsnrctl start
恢複正常。