查归档日志文件每小时生成量

阅读更多

在O racle数据库中，通过v$archived_log数据字典视图查询该数据库的归档日志文件的生成情况。 如果你以为在rac下需要查的gv$archvied_log视图，这其实是一个错误的想法。 无论在单实例数据库，还是多实例的RAC数据库，都是查这个视图来获取信息。

 

(miki西游 @mikixiyou 原文链接: http://mikixiyou.iteye.com/blog/1749746 )

 

查当天每小时的归档日志生成量

 

select logtime,
       count(*),
       round(sum(blocks * block_size) / 1024 / 1024) mbsize
  from (select trunc(first_time, 'hh') as logtime, a.BLOCKS, a.BLOCK_SIZE
          from v$archived_log a
         where a.DEST_ID = 1
           and a.FIRST_TIME > trunc(sysdate))
 group by logtime
 order by logtime desc;

 

 

 

查最近一周每天的归档日志生成量

 

select logtime,
       count(*),
       round(sum(blocks * block_size) / 1024 / 1024) mbsize
  from (select trunc(first_time, 'dd') as logtime, a.BLOCKS, a.BLOCK_SIZE
          from v$archived_log a
         where a.DEST_ID = 1
           and a.FIRST_TIME > trunc(sysdate - 7))
 group by logtime
 order by logtime desc;

 

 

如果你需要知道RAC下各个节点的归档日志情况，我将上面脚本略作修改，增加thread#列。

 

查当天每小时的各个实例的归档日志生成量

 

select THREAD#,
       logtime,
       count(*),
       round(sum(blocks * block_size) / 1024 / 1024) mbsize
  from (select a.THREAD#,
               trunc(first_time, 'hh') as logtime,
               a.BLOCKS,
               a.BLOCK_SIZE
          from v$archived_log a
         where a.DEST_ID = 1
           and a.FIRST_TIME > trunc(sysdate))
 group by THREAD#, logtime
 order by THREAD#, logtime desc;

 

查最近一周每天的各个实例的归档日志生成量

select THREAD#,
       logtime,
       count(*),
       round(sum(blocks * block_size) / 1024 / 1024) mbsize
  from (select THREAD#,
               trunc(first_time, 'dd') as logtime,
               a.BLOCKS,
               a.BLOCK_SIZE
          from v$archived_log a
         where a.DEST_ID = 1
           and a.FIRST_TIME > trunc(sysdate - 7))
 group by THREAD#, logtime
 order by THREAD#, logtime desc;

 

敬请留存，以备不时之需 @mikixiyou