ˋ

select event,sum(decode(wait_Time,0,0,1)) "Prev",

sum(decode(wait_Time,0,1,0)) "Curr",count(*) "Tot"

from v$session_Wait

group by event order by 4;

146. ?睡隙幗僇腔淰蚚?錶ˋ

select name, waits, gets, waits/gets "Ratio"

from v$rollstat C, v$rollname D

where http://www.doczj.com/doc/81cc8fa3f524ccbff12184df.htmln = http://www.doczj.com/doc/81cc8fa3f524ccbff12184df.htmln;

147. ?睡潼諷桶諾潔腔 I/O 掀瞰ˋ

select B.tablespace_name name,B.file_name "file",A.phyrds pyr,

A.phyblkrd pbr,A.phywrts pyw, A.phyblkwrt pbw

from v$filestat A, dba_data_files B

where A.file# = B.file_id

order by B.tablespace_name;

148. ?睡潼諷恅璃炵苀腔 I/O 掀瞰ˋ

select substr(C.file#,1,2) "#", substr(http://www.doczj.com/doc/81cc8fa3f524ccbff12184df.html,1,30) "Name",

C.status, C.bytes, D.phyrds, D.phywrts

from v$datafile C, v$filestat D

where C.file# = D.file#;

149. ?睡婓議跺蚚誧狟梑垀衄腔坰竘ˋ

select user_indexes.table_name, user_indexes.index_name,uniqueness, column_name

from user_ind_columns, user_indexes

where user_ind_columns.index_name = user_indexes.index_name

and user_ind_columns.table_name = user_indexes.table_name

order by user_indexes.table_type, user_indexes.table_name,

user_indexes.index_name, column_position;

150. ?睡潼諷 SGA 腔韜笢薹ˋ

select a.value + b.value "logical_reads", c.value "phys_reads",

round(100 * ((a.value+b.value)-c.value) / (a.value+b.value)) "BUFFER HIT RATIO"

from v$sysstat a, v$sysstat b, v$sysstat c

where a.statistic# = 38 and b.statistic# = 39

and c.statistic# = 40;

151. ?睡潼諷 SGA 笢趼萎遣喳?腔韜笢薹ˋ

select parameter, gets,Getmisses , getmisses/(gets+getmisses)*100 "miss ratio",

(1-(sum(getmisses)/ (sum(gets)+sum(getmisses))))*100 "Hit ratio"

from v$rowcache

where gets+getmisses <>0

group by parameter, gets, getmisses;

152. ?睡潼諷 SGA 笢僕砅遣湔?腔韜笢薹ㄛ茼蜆苤衾1% ˋ

select sum(pins) "Total Pins", sum(reloads) "Total Reloads",

sum(reloads)/sum(pins) *100 libcache

from v$librarycache;

select sum(pinhits-reloads)/sum(pins) "hit radio",sum(reloads)/sum(pins) "reload percent"

from v$librarycache;

153. ?睡珆尨垀衄杅擂踱勤砓腔濬梗睿湮苤ˋ

select count(name) num_instances ,type ,sum(source_size) source_size ,

sum(parsed_size) parsed_size ,sum(code_size) code_size ,sum(error_size) error_size,

sum(source_size) +sum(parsed_size) +sum(code_size) +sum(error_size) size_required

from dba_object_size

group by type order by 2;

154. 潼諷 SGA 笢笭酕?祩遣湔?腔韜笢薹ㄛ茼蜆苤衾1%

SELECT name, gets, misses, immediate_gets, immediate_misses,

Decode(gets,0,0,misses/gets*100) ratio1,

Decode(immediate_gets+immediate_misses,0,0,

immediate_misses/(immediate_gets+immediate_misses)*100) ratio2

FROM v$latch WHERE name IN ('redo allocation', 'redo copy');

155. 潼諷囀湔睿茞攫腔齬唗掀薹ㄛ郔疑妏坳苤衾 .10ㄛ崝樓 sort_area_size

SELECT name, value FROM v$sysstat WHERE name IN ('sorts (memory)', 'sorts (disk)');

156. ?