全部博文(85)
分类: Oracle
2010-06-07 22:24:19
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$Database;
10、如何远程判断Oracle数据库的安装平台
select * from
v$version;
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;
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$rollname.usn order by rownum
15、捕捉运行很久的
column username
format a12
column opname format a16
column progress format a8
select
username,sid,opname,
round(sofar*100 / totalwork,0) || '%' as
progress,
time_remaining,sql_text
from v$session_longops ,
v$sql
where time_remaining <> 0
and sql_address = address
and
sql_hash_value = hash_value
/
16。查看数据表的参数信息
SELECT
partition_name, high_value, high_value_length, tablespace_name,
pct_free, pct_used, ini_trans, max_trans, initial_extent,
next_extent, min_extent, max_extent, pct_increase, FREELISTS,
freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks,
empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size,
last_analyzed
FROM dba_tab_partitions
--WHERE table_name =
:tname AND table_owner = :towner
ORDER BY partition_position
17。
查找object为哪些进程所用
select
p.spid,
s.sid,
s.serial# serial_num,
s.username
user_name,
a.type object_type,
s.osuser os_user_name,
a.owner,
a.object
object_name,
decode(sign(48 - command),
1,
to_char(command),
'Action Code #' || to_char(command) ) action,
p.program
oracle_process,
s.terminal terminal,
s.program program,
s.status
session_status
from v$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
18。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$process p
where st.sid =
s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL'
or
s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid
asc, s.username asc, s.osuser asc
19。查看锁(lock)情况
select /*+
RULE */ ls.osuser os_user_name, ls.username user_name,
decode(ls.type,
'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX',
'Transaction
enqueue lock', 'UL', 'User supplied lock') lock_type,
o.object_name
object, decode(ls.lmode, 1, null, 2, 'Row Share', 3,
'Row
Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)
lock_mode,
o.owner, ls.sid, ls.serial# serial_num, ls.id1, ls.id2
from
sys.dba_objects o, ( select s.osuser, s.username, l.type,
l.lmode,
s.sid, s.serial#, l.id1, l.id2 from v$session s,
v$lock
l where s.sid = l.sid ) ls where o.object_id = ls.id1 and o.owner
<>
'SYS' order by o.owner, o.object_name
根据sid查是哪台电脑的链接
column
osuser format a15
column username format a10
column machine
format a30
select osuser,machine,username,sid,serial# from v$session
where sid='128';
根据sid查对应的sql
select SID,SQL_TEXT from
v$open_cursor where SID='128';
20。查看等待(wait)情况
SELECT
v$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$waitstat.count
21。查看sga情况
SELECT
NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC
22。查看catched
object
SELECT owner, name,
db_link, namespace,
type,
sharable_mem, loads, executions,
locks, pins, kept FROM
v$db_object_cache
23。查看V$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$SQLAREA
24。查看object分类数量
select decode
(o.type#,1,'INDEX' , 2,'TABLE' , 3 , 'CLUSTER' , 4, 'VIEW' , 5 ,
'SYNONYM'
, 6 , 'SEQUENCE' , 'OTHER' ) object_type , count(*) quantity from
sys.obj$
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
25。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$
26。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)
27.查询表空间使用情况
select
a.tablespace_name "表空间名称",
100-round((nvl(b.bytes_free,0)/a.bytes_alloc)*100,2)
"占用率(%)",
round(a.bytes_alloc/1024/1024,2) "容量(M)",
round(nvl(b.bytes_free,0)/1024/1024,2)
"空闲(M)",
round((a.bytes_alloc-nvl(b.bytes_free,0))/1024/1024,2)
"使用(M)",
Largest "最大扩展段(M)",
to_char(sysdate,'yyyy-mm-dd
hh24:mi:ss') "采样时间"
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
28. 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;
29。查询有哪些数据库实例在运行
select
inst_name from v$active_instances;