oracle 10g数据文件的表空间简单扩展

tablespace使用率已经大于我们的规定阀值(75%)；
--简单查看tablespace的使用情况,此语句对添加后的数据文件，如果没有使用的话，是监控不出来的

SELECT D.TABLESPACE_NAME,
SPACE "SUM_SPACE(MB)",
BLOCKS SUM_BLOCKS,
SPACE - NVL(FREE_SPACE, 0) "USED_SPACE(MB)",
FREE_SPACE "FREE_SPACE(MB)",
ROUND((1 - NVL(FREE_SPACE, 0) / SPACE) * 100, 2) "USED(%)",
ROUND((NVL(FREE_SPACE, 0) / SPACE) * 100, 2) "FREE(%)"
FROM (SELECT TABLESPACE_NAME,
ROUND(SUM(BYTES) / (1024 * 1024), 2) SPACE,
SUM(BLOCKS) BLOCKS
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME) D,
(SELECT TABLESPACE_NAME,
ROUND(SUM(BYTES) / (1024 * 1024), 2) FREE_SPACE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F
WHERE D.TABLESPACE_NAME =F.TABLESPACE_NAME(+)
ORDER BY TABLESPACE_NAME;

--查看tablespace的使用情况，详细语句

select ts.tablespace_name,
(case
when size_info.max_size <= 0 then
size_info.pct_used
else
round((1 - size_info.max_megs_available / size_info.max_size) * 100)
end) pct_used_of_max
from (select a.tablespace_name,
round(a.bytes_alloc / 1024 / 1024) megs_alloc,
round(nvl(b.bytes_free, 0) / 1024 / 1024) megs_free,
round((a.bytes_alloc - nvl(b.bytes_free, 0)) / 1024 / 1024) megs_used,
round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100) pct_free,
100 - round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100) pct_used,
round(a.maxbytes / 1048576) max_size,
round((a.maxbytes - a.bytes_alloc + nvl(b.bytes_free, 0)) /
1048576) max_megs_available
from (select f.tablespace_name,
sum(f.bytes) bytes_alloc,
sum(decode(f.autoextensible,
'YES',
f.maxbytes,
'NO',
f.bytes)) maxbytes
from dba_data_files f
group by tablespace_name) a,
(select f.tablespace_name, sum(f.bytes) bytes_free
from dba_free_space f
group by tablespace_name) b
where a.tablespace_name = b.tablespace_name(+)
union all
select h.tablespace_name,
round(sum(h.bytes_free + h.bytes_used) / 1048576) megs_alloc,
round(sum((h.bytes_free + h.bytes_used) -
nvl(p.bytes_used, 0)) / 1048576) megs_free,
round(sum(nvl(p.bytes_used, 0)) / 1048576) megs_used,
round((sum((h.bytes_free + h.bytes_used) -
nvl(p.bytes_used, 0)) /
sum(h.bytes_used + h.bytes_free)) * 100) pct_free,
100 - round((sum((h.bytes_free + h.bytes_used) -
nvl(p.bytes_used, 0)) /
sum(h.bytes_used + h.bytes_free)) * 100) pct_used,
round(sum(f.maxbytes) / 1048576) max_size,
round(case
when sum(f.maxbytes) - sum(nvl(p.bytes_used, 0)) > 0 then
(sum(f.maxbytes) - sum(nvl(p.bytes_used, 0))) / 1048576
else
(sum(nvl(p.bytes_used, 0)) - sum(f.maxbytes)) / 1048576
end) max_megs_available
from sys.v_$temp_space_header h,
sys.v_$temp_extent_pool  p,
dba_temp_files           f
where p.file_id(+) = h.file_id
and p.tablespace_name(+) = h.tablespace_name
and f.file_id = h.file_id
and f.tablespace_name = h.tablespace_name
group by h.tablespace_name) size_info,
sys.dba_tablespaces ts
where ts.tablespace_name = size_info.tablespace_name
and (case
when size_info.max_size <= 0 then
size_info.pct_used
else
round((1 - size_info.max_megs_available / size_info.max_size) * 100)
end) > 60
order by pct_used_of_max desc, size_info.max_megs_available desc;

--添加数据文件

--按需求我们smalltablespace所以maxisize最大不限不过最大就32GB，按需求是自动扩展，初始大小是1G,每次扩展一个2G；

alter tablespace TEST_11_2 add datafile'+DATADG/trsen/dbf_11_2_12.dbf' size 1024 m AUTOEXTENDON  next 1024 maxsize unlimited ;
alter tablespace TEST_10_2 add datafile'+DATADG/trsen/dbf_10_2_12.dbf' size 1024 m AUTOEXTEND ON next 1024maxsize unlimited;
alter tablespace TEST_10_3 add datafile'+DATADG/trsen/dbf_10_3_13.dbf' size 1024 m AUTOEXTEND ON next 1024maxsize unlimited;

--查看添加后表空间数据文件信息

select * from dba_data_files where tablespace_namein('TEST_11_2','TEST_10_2','TEST_10_3 ');
select * from dba_data_files where tablespace_nameIN('TEST_11_2','TEST_10_2','TEST_10_3 ');