--資料庫例項查詢
select * from gv$version;
--rdbms資訊
select * from gv$version where banner like '%oracle%';
--sql &net版本資訊
select * from gv$version where banner like '%tns%';
--sga資訊(database buffer)
select s.*,round(s.value/1024/1024) from gv$sga s where name = 'database buffers'
--sga(shared pool)
select s.*,round(s.bytes/1024/1024) from gv$sgainfo s where name = 'shared pool size'
--sga(log buffers)
select s.*,round(s.bytes/1024/1024) from gv$sgastat s where s.name='log_buffer'
--db_block size
select p.value/1024,p.* from gv$parameter p where name = 'db_block_size'
--表空間資訊
select * from dba_tablespaces;
--表空間使用率
select f.tablespace_name,
a.total 總共m,
f.free 空閒m,
round((f.free / a.total) * 100) "空閒比率"
from (select tablespace_name, sum(bytes / (1024 * 1024)) total
from dba_data_files
group by tablespace_name) a,
(select tablespace_name, round(sum(bytes / (1024 * 1024))) free
from dba_free_space
group by tablespace_name) f
where a.tablespace_name = f.tablespace_name(+)
order by "空閒比率";
--資料檔案：
select * from dba_data_files;
--控制檔案狀態:
select * from v$controlfile;
select group# as 日誌組，
member 位址,
status 狀態,
is_recovery_dest_file
from v$logfile;
--相關引數檢視（session，processes）
select resource_name,max_utilization,initial_allocation,limit_value from v$resource_limit;
--最大游標(乙個session執行語句數量)
select * from gv$parameter where name like '%cursor%';
--cpu使用率
select round(t1.value*100/(t1.value+t2.value),4)||'%' 使用率,
s.begin_interval_time 開始時間
s.end_interval_time 結束時間
t1.*,t2.*,
from dba_hist_osstat t1,dba_hist_snapshot s,dba_hist_osstat t2
where t1.stat_name = 'busy_ticks'
and t2.stat_name = 'idle_ticks'
and t1.snap_id = s.snap_id
and t2.snap_id = s.snap_id
and s.begin_interval_time >= to_timestamp('2015-01-19 ', 'yyyy-mm-dd hh24')
and s.begin_interval_time < to_timestamp('2015-01-19 20', 'yyyy-mm-dd hh24');
--最大記憶體
select * from gv$parameter p where name = 'sga_target'
--記憶體使用率
select round(t.bytes*100/1073741824)||'%' 使用率,
to_char(s.begin_interval_time,'yyyy-mm-dd hh24:mi:ss') 開始時間,
to_char(s.end_interval_time,'yyyy-mm-dd hh24:mi:ss') 結束時間
from dba_hist_sgastat t,dba_hist_snapshot s
where t.snap_id = s.snap_id
and t.name = 'free memory'
and t.pool = 'shared pool'
and s.begin_interval_time >= to_timestamp('2015-01-19 08', 'yyyy-mm-dd hh24')
and s.begin_interval_time < to_timestamp('2015-01-19 20', 'yyyy-mm-dd hh24')
order by s.begin_interval_time;
--歷史session 統計
select to_char(s.begin_interval_time,'yyyy-mm-dd hh24:mi:ss') 開始時間,
to_char(s.end_interval_time,'yyyy-mm-dd hh24:mi:ss') 結束時間,
count(session_id)
from dba_hist_active_sess_history h,dba_hist_snapshot s
where h.snap_id = s.snap_id
and s.begin_interval_time >= to_timestamp('2015-01-19 08', 'yyyy-mm-dd hh24')
and s.begin_interval_time < to_timestamp('2015-01-19 20', 'yyyy-mm-dd hh24')
and h.session_type = 'foreground'
and h.sql_id is not null
group by to_char(s.begin_interval_time,'yyyy-mm-dd hh24:mi:ss'),to_char(s.end_interval_time,'yyyy-mm-dd hh24:mi:ss')
;--具體執行sql語句查詢
select * from dba_hist_sqltext where sql_id = '';
--無效物件
select owner,object_name,object_type from dba_objects where status!='valid' and owner!='sys' and owner!='system';
--io查詢
select * from v$iostat_file;
select * from dba_hist_iostat_filetype;
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