Oracle臨時表空間使用分析
select * from (select a.tablespace_name,sum(maxbytes/1024/1024/1024) total_G,sum(a.bytes/1024/1024) allocated_mb
from dba_temp_files a
where a.tablespace_name=upper(‘XXX‘) group by a.tablespace_name) x,
(select sum(b.bytes_used/1024/1024) used_mb,
sum(b.bytes_free/1024/1024) free_mb
from v$temp_space_header b
查詢現有運行中占據臨時表空間的SQL語句：
select se.sid,se.username,su.blocks*ts.block_size/1024/1024 mb_used,su.tablespace,
su.sqladdr address,sq.hash_value,sq.sql_text
from v$sort_usage su,v$session se,v$sqlarea sq,dba_tablespaces ts
where su.session_addr=se.saddr
and su.tablespace=ts.tablespace_name;
查詢會話匯總下，臨時表空間的使用情況：
select se.sid,se.username,se.osuser,pr.spid,se.module,se.program,
sum(su.blocks)ts.block_size/1024/1024 mb_used,su.tablespace,
count() sorts
from v$sort_usage su,v$session se,dba_tablespaces ts,v$process pr
where su.session_addr=se.saddr
and su.tablespace=ts.tablespace_name
group by se.sid,se.username,se.osuser,pr.spid,se.module,se.program,ts.block_size,su.tablespace;
---註意有時我們看到 unable to extend temp segment by 1024 in tablespace appdata;
不仔細以為是臨時表空間不足，其實這裏應該看appdata表空間大小
Oracle臨時表空間使用分析