oracle 10g数据文件的表空间简单扩展

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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 ');

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