oracle归档日志生成量
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。
1，查当天每小时的归档日志生成量
复制代码 代码示例:
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$archived_log a
where a.DEST_ID = 1
and a.FIRST_TIME > trunc(sysdate))
group by logtime
order by logtime desc;
2，查最近一周每天的归档日志生成量
复制代码 代码示例:
select logtime,
count(*),
round(sum(blocks * block_size) / 1024 / 1024) mbsize
from (select trunc(first_time, 'dd') as logtime, a.BLOCKS, a.BLOCK_SIZE
from v$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。
3，查当天每小时的各个实例的归档日志生成量
复制代码 代码示例:
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$archived_log a
where a.DEST_ID = 1
and a.FIRST_TIME > trunc(sysdate))
group by THREAD#, logtime
order by THREAD#, logtime desc;
4，查最近一周每天的各个实例的归档日志生成量
复制代码 代码示例:
select THREAD#,
logtime,
count(*),
round(sum(blocks * block_size) / 1024 / 1024) mbsize
from (select THREAD#,
trunc(first_time, 'dd') as logtime,
a.BLOCKS,
a.BLOCK_SIZE
from v$archived_log a
where a.DEST_ID = 1
and a.FIRST_TIME > trunc(sysdate - 7))
group by THREAD#, logtime
order by THREAD#, logtime desc;
