1、
:
select * from v$version;
:
Select * from v$database;
2、 (AWR)
AWR ?
Select occupant_name, occupant_desc, space_usage_kbytes
from v$sysaux_occupants
where occupant_name like '%AWR%';
AWR ?
select dbms_stats.get_stats_history_availability from dual;
AWR ?
select dbms_stats.get_stats_history_retention from dual;
AWR 15 ?
EXEC dbms_stats.alter_stats_history_retention(15);
3、
select * from v$license;
4、
select * from v$option;
5、
select * from v$sga;
select * from v$sgastat;
6、V$PARAMETER init.ora
select * from v$parameter;
7、
select 1 - (sum(decode(name, 'physical reads', value, 0)) /
(sum(decode(name, 'db block gets', value, 0)) +
(sum(decode(name, 'consistent gets', value, 0))))) "Read Hit Ratio"
from v$sysstat;
select sum(gets),
sum(getmisses),
(1 - (sum(getmisses) / (sum(gets) + sum(getmisses)))) * 100 HitRate
from v$rowcache;
SQL PL/SQL
select sum(pins) "Executions",
sum(pinhits) "Hits",
((sum(pinhits) / sum(pins)) * 100) "PinHitRatio",
sum(reloads) "Misses",
((sum(pins) / (sum(pins) + sum(reloads))) * 100) "RelHitRatio"
from v$librarycache;
V$SQLAREA
select b.username username,
a.disk_reads reads,
a.executions exec,
a.disk_reads / decode(a.executions, 0, 1, a.executions) rds_exec_ratio,
a.command_type,
a.sql_text Statement
from v$sqlarea a, dba_users b
where a.parsing_user_id = b.user_id
and a.disk_reads > 10000
order by a.disk_reads desc;
select a.sid, a.username, s.sql_text
from v$session a, v$sqltext s
where a.sql_address = s.address
and a.sql_hash_value = s.hash_value
order by a.username, a.sid, s.piece;
select a.username,
b.block_gets,
b.consistent_gets,
b.physical_reads,
b.block_changes,
b.consistent_changes
from v$session a, v$sess_io b
where a.sid = b.sid
order by a.username;
select a.sid, a.username, b.owner, b.object, b.type
from v$session a, v$access b
where a.sid = b.sid;
select /*+ ordered */
b.username, b.serial#, d.id1, a.sql_text
from v$lock d, v$session b, v$sqltext a
where b.lockwait = d.kaddr
and a.address = b.sql_address
and a.hash_value = b.sql_hash_value;
select /*+ ordered */
a.serial#, a.sid, a.username, b.id1, c.sql_text
from v$lock b, v$session a, v$sqltext c
where b.id1 in (select /*+ ordered */
distinct e.id1
from v$lock e, v$session d
where d.lockwait = e.kaddr)
and a.sid = b.sid
and c.hash_value = a.sql_hash_value
and b.request = 0;
select /*+ ordered */
username,
v$lock.sid,
trunc(id1 / power(2, 16)) rbs,
bitand(id1, to_number('ffff', 'xxxx')) + 0 slot,
id2 seq,
lmode,
request
from v$lock, v$session
where v$lock.type = 'TX'
and v$lock.sid = v$session.sid;
select username, sid, serial#, program, terminal
from v$session;
alter system kill session '11,18';