Oracle DB is down

Pls try below steps :

1.Go to db server.

Service stop.

①OEM(OracleEnterpriseManager)　(net start OracleDBConsole[SID])

②net start OracleOraDb11g_home1TNSListener[listenername])

③net start OracleService[SID])

Service start.

①net start OracleService[SID])

②net start OracleOraDb11g_home1TNSListener[listenername])

③OEM(OracleEnterpriseManager)　(net start OracleDBConsole[SID])

2. Go to CMD :

Set oracle_home and oracle_sid

Type :  sqlplus username/password@SID as sysdba;

; shutdown immdiate;

startup;

 

- check the alert.log from the DB server