分类： Oracle
2011-12-21 10:25:27
1、查看表空间的名称及大小
select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
2、查看表空间物理文件的名称及大小
select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
3、查看回滚段名称及大小
select segment_name, tablespace_name, r.status,
(initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent,
max_extents, v.curext CurExtent
From dba_rollback_segs r, v$rollstat v
Where r.segment_id = v.usn(+)
order by segment_name ;
4、查看控制文件
select name from v$controlfile;
5、查看日志文件
select member from v$logfile;
6、查看表空间的使用情况
select sum(bytes)/(1024*1024) as free_space,tablespace_name
from dba_free_space
group by tablespace_name;
SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,
(B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"
FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE C
WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME;
7、查看数据库库对象
select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
8、查看数据库的版本
Select version FROM Product_component_version
Where SUBSTR(PRODUCT,1,6)='Oracle';
9、查看数据库的创建日期和归档方式
Select Created, Log_Mode, Log_Mode From V$Database;
10、捕捉运行很久的SQL
column username format a12
column opname format a16
column progress format a8
select username,sid,opname,
round(sofar*100 / totalwork,0) || '%' as progress,
time_remaining,sql_text
from v$session_longops , v$sql
where time_remaining <> 0
and sql_address = address
and sql_hash_value = hash_value
/
11、查看数据表的参数信息
SELECT partition_name,
high_value,
high_value_length,
tablespace_name,
pct_free,
pct_used,
ini_trans,
max_trans,
initial_extent,
next_extent,
min_extent,
max_extent,
pct_increase,
FREELISTS,
freelist_groups,
LOGGING,
BUFFER_POOL,
num_rows,
blocks,
empty_blocks,
avg_space,
chain_cnt,
avg_row_len,
sample_size,
last_analyzed
FROM dba_tab_partitions
--WHERE table_name = :tname AND table_owner = :towner
ORDER BY partition_position;
12、查看还没提交的事务
select * from v$locked_object;
select * from v$transaction;
13、查找object为哪些进程所用
select p.spid,
s.sid,
s.serial# serial_num,
s.username user_name,
a.type object_type,
s.osuser os_user_name,
a.owner,
a.object object_name,
decode(sign(48 - command),
1,
to_char(command),
'Action Code #' || to_char(command)) action,
p.program oracle_process,
s.terminal terminal,
s.program program,
s.status session_status
from v$session s, v$access a, v$process p
where s.paddr = p.addr
and s.type = 'USER'
and a.sid = s.sid
and a.object = 'SUBSCRIBER_ATTR'
order by s.username, s.osuser;
14、回滚段查看
select rownum,
sys.dba_rollback_segs.segment_name Name,
v$rollstat.extents Extents,
v$rollstat.rssize Size_in_Bytes,
v$rollstat.xacts XActs,
v$rollstat.gets Gets,
v$rollstat.waits Waits,
v$rollstat.writes Writes,
sys.dba_rollback_segs.status status
from v$rollstat, sys.dba_rollback_segs, v$rollname
where v$rollname.name(+) = sys.dba_rollback_segs.segment_name
and v$rollstat.usn(+) = v$rollname.usn
order by rownum;
15、耗资源的进程（top session）
select s.schemaname schema_name,
decode(sign(48 - command),
1,
to_char(command),
'Action Code #' || to_char(command)) action,
status session_status,
s.osuser os_user_name,
s.sid,
p.spid,
s.serial# serial_num,
nvl(s.username, '[Oracle process]') user_name,
s.terminal terminal,
s.program program,
st.value criteria_value
from v$sesstat st, v$session s, v$process p
where st.sid = s.sid
and st.statistic# = to_number('38')
and ('ALL' = 'ALL' or s.status = 'ALL')
and p.addr = s.paddr
order by st.value desc, p.spid asc, s.username asc, s.osuser asc;
16、查看锁（lock）情况
select /*+ RULE */
ls.osuser os_user_name,
ls.username user_name,
decode(ls.type,
'RW',
'Row wait enqueue lock',
'TM',
'DML enqueue lock',
'TX',
'Transaction enqueue lock',
'UL',
'User supplied lock') lock_type,
o.object_name object,
decode(ls.lmode,
1,
null,
2,
'Row Share',
3,
'Row Exclusive',
4,
'Share',
5,
'Share Row Exclusive',
6,
'Exclusive',
null) lock_mode,
o.owner,
ls.sid,
ls.serial# serial_num,
ls.id1,
ls.id2
from sys.dba_objects o,
(select s.osuser,
s.username,
l.type,
l.lmode,
s.sid,
s.serial#,
l.id1,
l.id2
from v$session s, v$lock l
where s.sid = l.sid) ls
where o.object_id = ls.id1
and o.owner <> 'SYS'
order by o.owner, o.object_name;
17、查看等待（wait）情况
SELECT v$waitstat.class,
v$waitstat.count count,
SUM(v$sysstat.value) sum_value
FROM v$waitstat, v$sysstat
WHERE v$sysstat.name IN ('db block gets', 'consistent gets')
group by v$waitstat.class, v$waitstat.count;
18、查看sga情况
SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC
19、查看catched object
SELECT owner,
name,
db_link,
namespace,
type,
sharable_mem,
loads,
executions,
locks,
pins,
kept
FROM v$db_object_cache;
20、查看V$SQLAREA
SELECT SQL_TEXT,
SHARABLE_MEM,
PERSISTENT_MEM,
RUNTIME_MEM,
SORTS,
VERSION_COUNT,
LOADED_VERSIONS,
OPEN_VERSIONS,
USERS_OPENING,
EXECUTIONS,
USERS_EXECUTING,
LOADS,
FIRST_LOAD_TIME,
INVALIDATIONS,
PARSE_CALLS,
DISK_READS,
BUFFER_GETS,
ROWS_PROCESSED
FROM V$SQLAREA;
21、查看object分类数量
select decode (o.type#,1,'INDEX' , 2,'TABLE' , 3 , 'CLUSTER' , 4, 'VIEW' , 5 ,
'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) object_type , count(*) quantity from
sys.obj$ o where o.type# > 1 group by decode (o.type#,1,'INDEX' , 2,'TABLE' , 3
, 'CLUSTER' , 4, 'VIEW' , 5 , 'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) union select
'COLUMN' , count(*) from sys.col$ union select 'DB LINK' , count(*) from
22、按用户查看object种类
select u.name schema,
sum(decode(o.type#, 1, 1, NULL)) indexes,
sum(decode(o.type#, 2, 1, NULL)) tables,
sum(decode(o.type#, 3, 1, NULL)) clusters,
sum(decode(o.type#, 4, 1, NULL)) views,
sum(decode(o.type#, 5, 1, NULL)) synonyms,
sum(decode(o.type#, 6, 1, NULL)) sequences,
sum(decode(o.type#,
1,
NULL,
2,
NULL,
3,
NULL,
4,
NULL,
5,
NULL,
6,
NULL,
1)) others
from sys.obj$ o, sys.user$ u
where o.type# >= 1
and u.user# = o.owner#
and u.name <> 'PUBLIC'
group by u.name
order by sys.link$
union
select 'CONSTRAINT', count(*) from sys.con$;
23、有关connection的相关信息
1）查看有哪些用户连接
select s.osuser os_user_name,
decode(sign(48 - command),
1,
to_char(command),
'Action Code #' || to_char(command)) action,
p.program oracle_process,
status session_status,
s.terminal terminal,
s.program program,
s.username user_name,
s.fixed_table_sequence activity_meter,
'' query,
0 memory,
0 max_memory,
0 cpu_usage,
s.sid,
s.serial# serial_num
from v$session s, v$process p
where s.paddr = p.addr
and s.type = 'USER'
order by s.username, s.osuser;
2）根据v.sid查看对应连接的资源占用等情况
select n.name,
v.value,
n.class,
n.statistic#
from v$statname n,
v$sesstat v
where v.sid = 71 and
v.statistic# = n.statistic#
order by n.class, n.statistic#
3）根据sid查看对应连接正在运行的sql
select /*+ PUSH_SUBQ */
command_type,
sql_text,
sharable_mem,
persistent_mem,
runtime_mem,
sorts,
version_count,
loaded_versions,
open_versions,
users_opening,
executions,
users_executing,
loads,
first_load_time,
invalidations,
parse_calls,
disk_reads,
buffer_gets,
rows_processed,
sysdate start_time,
sysdate finish_time,
'>' || address sql_address,
'N' status
from v$sqlarea
where address = (select sql_address from v$session where sid = 71)
24、查询表空间使用情况
select a.tablespace_name "±í¿Õ¼äÃû³Æ",
100 - round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100, 2) "Õ¼ÓÃÂÊ(%)",
round(a.bytes_alloc / 1024 / 1024, 2) "ÈÝÁ¿(M)",
round(nvl(b.bytes_free, 0) / 1024 / 1024, 2) "¿ÕÏÐ(M)",
round((a.bytes_alloc - nvl(b.bytes_free, 0)) / 1024 / 1024, 2) "ʹÓÃ(M)",
Largest "×î´óÀ©Õ¹¶Î(M)",
to_char(sysdate, 'yyyy-mm-dd hh24:mi:ss') "²ÉÑùʱ¼ä"
from (select f.tablespace_name,
sum(f.bytes) bytes_alloc,
sum(decode(f.autoextensible, 'YES', f.maxbytes, 'NO', f.bytes)) maxbytes
from dba_data_files f
group by tablespace_name) a,
(select f.tablespace_name, sum(f.bytes) bytes_free
from dba_free_space f
group by tablespace_name) b,
(select round(max(ff.length) * 16 / 1024, 2) Largest,
ts.name tablespace_name
from sys.fet$ ff, sys.file$ tf, sys.ts$ ts
where ts.ts# = ff.ts#
and ff.file# = tf.relfile#
and ts.ts# = tf.ts#
group by ts.name, tf.blocks) c
where a.tablespace_name = b.tablespace_name
and a.tablespace_name = c.tablespace_name;
25、查询表空间的碎片程度
select tablespace_name,count(tablespace_name) from dba_free_space group by tablespace_name
having count(tablespace_name)>10;
alter tablespace name coalesce;
alter table name deallocate unused;
create or replace view ts_blocks_v as
select tablespace_name,block_id,bytes,blocks,'free space' segment_name from dba_free_space
union all
select tablespace_name,block_id,bytes,blocks,segment_name from dba_extents;
select * from ts_blocks_v;
select tablespace_name,sum(bytes),max(bytes),count(block_id) from dba_free_space
group by tablespace_name;
26、查询有哪些数据库实例在运行
select inst_name from v$active_instances;
