本篇内容介绍了“RAC怎么扩大online日志组大小”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
1.查看当前默认日志组
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SQL> select GROUP#,THREAD#,SEQUENCE#,BYTES,MEMBERS,ARCHIVED,STATUS from v$log; GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS ---------- ---------- ---------- ---------- ---------- --- ---------------- 1 1 821 52428800 1 YES INACTIVE 2 1 822 52428800 1 NO CURRENT 3 2 241 52428800 1 YES INACTIVE 4 2 242 52428800 1 NO CURRENT |
2.添加日志组和成员
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节点1 alter database add logfile thread 1 group 11 ('+DATA/funddb/onlinelog/redo11a.log','+DATA/funddb/onlinelog/redo11b.log') size 500M; alter database add logfile thread 1 group 12 ('+DATA/funddb/onlinelog/redo12a.log','+DATA/funddb/onlinelog/redo12b.log') size 500M; alter database add logfile thread 1 group 13 ('+DATA/funddb/onlinelog/redo13a.log','+DATA/funddb/onlinelog/redo13b.log') size 500M; 节点2 alter database add logfile thread 2 group 14 ('+DATA/funddb/onlinelog/redo14a.log','+DATA/funddb/onlinelog/redo14b.log') size 500M; alter database add logfile thread 2 group 15 ('+DATA/funddb/onlinelog/redo15a.log','+DATA/funddb/onlinelog/redo15b.log') size 500M; alter database add logfile thread 2 group 16 ('+DATA/funddb/onlinelog/redo16a.log','+DATA/funddb/onlinelog/redo16b.log') size 500M; |
3.切换日志
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节点1 SQL> alter system switch logfile; System altered. 节点2 SQL> alter system switch logfile; System altered. |
4.查询并等待
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SQL> select GROUP#,THREAD#,SEQUENCE#,BYTES,MEMBERS,ARCHIVED,STATUS from v$log; GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS ---------- ---------- ---------- ---------- ---------- --- ---------------- 1 1 821 52428800 1 YES INACTIVE 2 1 822 52428800 1 YES ACTIVE 3 2 241 52428800 1 YES INACTIVE 4 2 242 52428800 1 YES ACTIVE 11 1 823 524288000 2 NO CURRENT 12 1 0 524288000 2 YES UNUSED 13 1 0 524288000 2 YES UNUSED 14 2 243 524288000 2 NO CURRENT 15 2 0 524288000 2 YES UNUSED 16 2 0 524288000 2 YES UNUSED 10 rows selected. 等待...... SQL> select GROUP#,THREAD#,SEQUENCE#,BYTES,MEMBERS,ARCHIVED,STATUS from v$log; GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS ---------- ---------- ---------- ---------- ---------- --- ---------------- 1 1 821 52428800 1 YES INACTIVE 2 1 822 52428800 1 YES INACTIVE 3 2 241 52428800 1 YES INACTIVE 4 2 242 52428800 1 YES INACTIVE 11 1 823 524288000 2 NO CURRENT 12 1 0 524288000 2 YES UNUSED 13 1 0 524288000 2 YES UNUSED 14 2 243 524288000 2 NO CURRENT 15 2 0 524288000 2 YES UNUSED 16 2 0 524288000 2 YES UNUSED 10 rows selected. |
5.删除旧日志组
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SQL> alter database drop logfile group 1; Database altered. SQL> alter database drop logfile group 2; Database altered. SQL> alter database drop logfile group 3; Database altered. SQL> alter database drop logfile group 4; Database altered. |
6.确认完成日志组的扩大
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SQL> select GROUP#,THREAD#,SEQUENCE#,BYTES,MEMBERS,ARCHIVED,STATUS from v$log; GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS ---------- ---------- ---------- ---------- ---------- --- ---------------- 11 1 823 524288000 2 NO CURRENT 12 1 0 524288000 2 YES UNUSED 13 1 0 524288000 2 YES UNUSED 14 2 243 524288000 2 NO CURRENT 15 2 0 524288000 2 YES UNUSED 16 2 0 524288000 2 YES UNUSED |
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