Detailed explanation of 7 services for Oracle 11g

7 services of Oracle 11g After
successful installation of Oracle 11g, there are 7 services in total
　　. The meanings of these 7 services are:
　　1. Oracle ORCL VSS Writer Service:
　　Oracle volume mapping copy writing service, VSS (Volume Shadow Copy Service) can Let storage infrastructure (such as disks, arrays, etc.) create high-fidelity point-in-time images, that is, shadow copies. It can create mapped copies on multiple volumes or a single volume without affecting the system performance of the system. (Not required)
　　2. OracleDBConsoleorcl: Oracle database console service, orcl is the instance identifier of Oracle, and the default instance is orcl. This service needs to be started when running Enterprise Manager (Enterprise Manager OEM). (Not required)
　　3. OracleJobSchedulerORCL: Oracle job scheduling (timer) service, ORCL is the Oracle instance identifier. (Not necessary to start)
　　4. OracleMTSRecoveryService: server control. This service allows the database to act as a resource manager for Microsoft Transaction Server MTS, COM/COM+ objects and transactions in a distributed environment. (Not necessary to start)
　　5. OracleOraDb11g_home1ClrAgent: part of the Oracle database .NET extension service. (Not mandatory)
　　6. OracleOraDb11g_home1TNSListener: Listener service, the service is only needed when the database needs remote access. (It is not necessary to start, and there will be a detailed explanation below).
　　7. OracleServiceORCL: database service (database instance), which is the core service of Oracle. This service is the basis for database startup. Only when this service is started, the Oracle database can be started normally. (Must be started)
　　For beginners, if you only use the sql*plus that comes with Oracle, you only need to start OracleServiceORCL. If you use third-party tools such as PL/SQL Developer, the OracleOraDb11g_home1TNSListener service should also be enabled. OracleDBConsoleorcl must be enabled to enter web-based EM, and other services are rarely used.
　　Note: ORCL is the database instance name, the default database is ORCL, you can create other, namely OracleService + database name.
　　Control Panel > Administrative Tools > Services >
　　Turn off the oracle service:
　　find "OraclServiceORCL", "OracleDBConsoleorcl" and "OracleOraDb11g_home1ClrAgent" and set their properties to manual, then turn them off.
　　Turn off the sqlserver service:
　　find "SQL Server (MSSQLSERVER)" and "SQL Server (SQLEXPRESS)" also set their properties to manual, then turn them off.