ba培养Oracle高级DBA,走向卓越(oracle h d)

Oracle数据库是现代企业不可或缺的高性能数据库之一,而高级Oracle DBA对企业的数据安全性和数据库性能有重要的影响,成为企业数据管理的关键角色。在这篇文章中,我们将分享一些有关如何成为高级Oracle DBA的经验和技巧,帮助DBA不断提升自己,走向卓越。

1. 获取专业技能:熟练掌握Oracle数据库管理技能是成为高级Oracle DBA的第一步。在这方面,需要有深厚的Oracle Database知识储备,并熟练掌握故障排除和维护工作的能力。学习和掌握SQL和PL/SQL编程技巧,能够快速有效地解决常见的问题。

2. 获得经验:工作经验对于成为高级Oracle DBA至关重要。在实际工作中,经验丰富的DBA需要能够以最短的时间发现和解决问题,协调开发团队和支持业务部门,通过技术解决方案来确保数据的高可用性和性能。

3. 持续学习:获取知识技能只是开始,DBA需要通过阅读文献、参加在线或现场研讨会或培训来不断更新自己的知识和技能。例如,学习Oracle的最新版本,掌握新功能和最佳实践,这能帮助DBA更好地管理Oracle数据库,保障企业数据库安全和性能。

4. 自我激励:高级Oracle DBA需要积极自我激励,保持清晰头脑,且对于自我提升充满热情。例如,参加有行业权威认证的培训课程,如Oracle OCA、OCP、OCM等级别,这不仅能使DBA更加专业,同时也可以为DBA提供更多的发展机会和就业竞争力。

5. 更新技术工具:数据库技术不断更新,DBA也需要更新自己的技术工具。例如,Oracle的最新版本提供了一些强大的工具和高级功能,如自动存储管理,这可以帮助DBA更快地完成大批量数据操作和维护,从而提高工作效率和工作质量。同时,DBA还可以尝试使用第三方的数据库管理工具,如Oracle Enterprise Manager和Microsoft SQL Server Management Studio等。

6. 培训和实践:接受不同层次的Oracle数据库管理培训和实践非常重要。实践是一个务实的引导,通过实验练习来提升技能、夯实技术功底,同时通过老师的带领和指导来获取更多的经验和知识。

在总结中, 如果你想要成为一位高级的Oracle DBA,以上是一些关键环节和重要步骤。 保持专业知识、不断学习提高自身技能、获取大量的工作经验以及多营造学习的环境,将有助于您打造成功的Oracle DBA职业生涯安全么!

参考代码

————————————————–

— 创建Oracle 12C EM用户,设置密码并赋予权限

CREATE USER oem IDENTIFIED BY oem_password;

GRANT CONNECT, DBA, EM_EXPRESS_ALL TO oem;

— 创建Oracle自动备份模板

RUN {

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK CLEAR;

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE SBT TO ‘%F’;

CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET;

CONFIGURE DEVICE TYPE SBT PARALLELISM 1 BACKUP TYPE TO BACKUPSET;

CONFIGURE ENCRYPTION FOR DATABASE OFF;

CONFIGURE ENCRYPTION ALGORITHM ‘AES128’;

CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 1 TIMES TO DEVICE TYPE DISK;

CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON STANDBY;

CONFIGURE BACKUP OPTIMIZATION OFF; # 可提高恢复时间

CONFIGURE RETENTION POLICY TO REDUNDANCY 1;

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;

CONFIGURE BACKUP OPTIMIZATION ON;

CONFIGURE DEFAULT DEVICE TYPE TO DISK;

}

— 启用Oracle日志记录监控

ALTER SYSTEM SET audit_trl=’db,extended’ SCOPE=SPFILE;

SHUTDOWN IMMEDIATE;

STARTUP;

— 创建用于收集监控信息的Oracle用户

CREATE USER perf IDENTIFIED BY perf_password;

GRANT CONNECT, RESOURCE, DBA TO perf;

GRANT SELECT ANY DICTIONARY TO perf;

GRANT SELECT ANY TABLE TO perf;

GRANT EXECUTE ON sys.dbms_lock TO perf;

— 启用Oracle日志记录监控

AUDIT SESSION, SYSTEM AUDIT ANY, SELECT ANY TABLE, EXECUTE ANY PROCEDURE

BY ACCESS;

— 添加Oracle健康监测脚本

BEGIN

DBMS_SCHEDULER.CREATE_JOB (

job_name => ‘monitor_health’,

job_type => ‘PLSQL_BLOCK’,

job_action => ‘

>

DECLARE

alert_threshold NUMBER;

health_status VARCHAR2(10);

num_cpus NUMBER := DBMS_CPU_INFO.NUM_CPUS;

cpu_threshold NUMBER;

num_rollback_segments NUMBER;

rollback_threshold NUMBER;

database_size_mb NUMBER;

db_size_threshold NUMBER;

undo_used_mb NUMBER;

undo_threshold NUMBER;

free_space_mb NUMBER;

space_threshold NUMBER;

BEGIN

SELECT VALUE INTO alert_threshold FROM V$PARAMETER WHERE NAME = ”log_alert_timeout”;

SELECT ROUND(cpu_count * alert_threshold / 100) INTO cpu_threshold FROM (SELECT COUNT(*) cpu_count FROM V$PROCESS);

SELECT COUNT(*) INTO num_rollback_segments FROM DBA_ROLLBACK_SEGS;

SELECT ROUND(num_rollback_segments * alert_threshold / 100) INTO rollback_threshold FROM DUAL;

SELECT (SUM(bytes) / 1024 / 1024) INTO database_size_mb FROM DBA_DATA_FILES;

SELECT ROUND(database_size_mb * alert_threshold / 100) INTO db_size_threshold FROM DUAL;

SELECT (SUM(used_ublk * (undoblks / (60 * 60 * 24)))) / (1024 * 1024) INTO undo_used_mb FROM V$TRANSACTION;

SELECT ROUND(undo_used_mb * alert_threshold / 100) INTO undo_threshold FROM DUAL;

SELECT (SUM(bytes) / 1024 / 1024 / num_cpus) INTO free_space_mb FROM (SELECT FREE_SPACE FREE_MB FROM V$ASM_DISKGROUP_STAT WHERE NAME = ”DATA” AND STATE = ”MOUNTED”);

SELECT ROUND(free_space_mb * alert_threshold / 100) INTO space_threshold FROM DUAL;

IF cpu_threshold > num_cpus THEN

health_status := ”CPU_COUNT_ERROR”;

ELSIF rollback_threshold > num_rollback_segments THEN

health_status := ”ROLLBACK_SEGMENT_ERROR”;

ELSIF db_size_threshold > database_size_mb THEN

health_status := ”DATABASE_SIZE_ERROR”;

ELSIF undo_threshold > undo_used_mb THEN

health_status := ”UNDO_SPACE_ERROR”;

ELSIF space_threshold > free_space_mb THEN

health_status := ”DISK_SPACE_ERROR”;

ELSE

health_status := ”OK”;

END IF;

IF health_status ”OK” THEN

RSE_APPLICATION_ERROR(-20204, health_status);

END IF;

END monitor_health;

‘,

number_of_arguments => 0,

start_date => SYSTIMESTAMP,

repeat_interval => ‘FREQ=HOURLY;BYMINUTE=0’,

end_date => NULL,

enabled => TRUE,

comments => ‘This job checks the health of the database and rses an alert if there are any issues.’

);

END;


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