oracle 성능 보기
SQL :( Ratio 2 , )
select rn.name, rs.GETS, rs.WAITS, (rs.WAITS / rs.GETS) * 100 ratio
from v$rollstat rs, v$rollname rn
where rs.USN = rn.usn
SQL :(immediate_contention wait_contention 1 )
select name,
(t.IMMEDIATE_MISSES /
decode((t.IMMEDIATE_GETS + t.IMMEDIATE_MISSES),
0,
-1,
(t.IMMEDIATE_GETS + t.IMMEDIATE_MISSES))) * 100 immediate_contention,
(t.MISSES / decode((t.GETS + t.MISSES), 0, -1, (t.GETS + t.MISSES))) * 100 wait_contention
from v$latch t
where name in ('redo copy', 'redo allocation')
:( , , , )
select t.tablespace_name,
sum(t.bytes),
max(t.bytes),
count(*),
max(t.bytes) / sum(t.bytes) radio
from dba_free_space t
group by t.tablespace_name
order by t.tablespace_name
:
select t.NAME, t.VALUE from v$sysstat t where t.NAME like 'sort%'
SGA :
select * from v$sga
:( 70%, init.ora DB_BLOCK_BUFFER )
select 1 - sum(decode(name, 'physical reads', value, 0)) /
(sum(decode(name, 'db block gets', value, 0)) +
sum(decode(name, 'consistent gets', value, 0))) hit_ratio
from v$sysstat t
where name in ('physical reads', 'db block gets', 'consistent gets')
:( ratio1 1 , , ratio2 10% , SHARED_POOL_SIZE)
select sum(pins) pins,
sum(reloads) reloads,
(sum(reloads) / sum(pins)) * 100 ratio1
from v$librarycache
select sum(gets) gets,
sum(getmisses) getmisses,
(sum(getmisses) / sum(gets)) * 100 ratio2
from v$rowcache
INIT.ORA :
select * from v$parameter
/////
Oracle ( )
0、
col PROPERTY_NAME format a25
col PROPERTY_VALUE format a30
col DESCRIPTION format a100
select * from database_properties;
select * from v$version;
1、 SID,SERIAL#
SELECT Sid, Serial# FROM V$session
WHERE Audsid = Sys_Context('USERENV', 'SESSIONID');
2、 session OS ID
SELECT p.Spid "OS Thread", b.NAME "Name-User", s.Program, s.Sid, s.Serial#,s.Osuser, s.Machine
FROM V$process p, V$session s, V$bgprocess b
WHERE p.Addr = s.Paddr
AND p.Addr = b.Paddr And (s.sid=&1 or p.spid=&1)
UNION ALL
SELECT p.Spid "OS Thread", s.Username "Name-User", s.Program, s.Sid,s.Serial#, s.Osuser, s.Machine
FROM V$process p, V$session s
WHERE p.Addr = s.Paddr
And (s.sid=&1 or p.spid=&1)
AND s.Username IS NOT NULL;
3、 sid 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 = &sid );
4、 object
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$process p
WHERE s.Paddr = p.Addr
AND s.TYPE = 'USER'
AND a.Sid = s.Sid
AND a.OBJECT = '&obj'
ORDER BY s.Username, s.Osuser
5、
SELECT s.Osuser Os_User_Name,Decode(Sign(48 - Command),1,To_Char(Command),
'Action Code #' || To_Char(Command)) Action,
p.Program Oracle_Process, Status Session_Status, s.Terminal Terminal,
s.Program Program, s.Username User_Name,
s.Fixed_Table_Sequence Activity_Meter, '' Query, 0 Memory,
0 Max_Memory, 0 Cpu_Usage, s.Sid, s.Serial# Serial_Num
FROM V$session s, V$process p
WHERE s.Paddr = p.Addr
AND s.TYPE = 'USER'
ORDER BY s.Username, s.Osuser
6、 v.sid
SELECT n.NAME, v.VALUE, n.CLASS, n.Statistic# FROM V$statname n, V$sesstat v
WHERE v.Sid = &sid
AND v.Statistic# = n.Statistic#
ORDER BY n.CLASS, n.Statistic#
7、 (top session)
SELECT s.Schemaname Schema_Name,Decode(Sign(48 - Command),
1, To_Char(Command), 'Action Code #' || To_Char(Command)) Action,Status Session_Status, s.Osuser Os_User_Name, s.Sid, p.Spid,s.Serial# Serial_Num, Nvl(s.Username, '[Oracle process]') User_Name,
s.Terminal Terminal, s.Program Program, St.VALUE Criteria_Value
FROM V$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
8、 (lock)
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;
9、 (wait)
SELECT Ws.CLASS, Ws.COUNT COUNT, SUM(Ss.VALUE) Sum_Value
FROM V$waitstat Ws, V$sysstat Ss
WHERE Ss.NAME IN ('db block gets', 'consistent gets')
GROUP BY Ws.CLASS, Ws.COUNT;
10、 process/session
SELECT p.Pid, p.Spid, s.Program, s.Sid, s.Serial#
FROM V$process p, V$session s
WHERE s.Paddr = p.Addr;
11、 session(10g)
SELECT Sid, Username, Event, Blocking_Session, Seconds_In_Wait, Wait_Time
FROM V$session
WHERE State IN ('WAITING')
AND Wait_Class != 'Idle';
12、
col user_name format a32
SELECT /*+ rule */ Lpad(' ', Decode(l.Xidusn, 0, 3, 0)) || l.Oracle_Username User_Name,
o.Owner, o.Object_Name, s.Sid, s.Serial#
FROM V$locked_Object l, Dba_Objects o, V$session s
WHERE l.Object_Id = o.Object_Id
AND l.Session_Id = s.Sid
ORDER BY o.Object_Id, Xidusn DESC;
col username format a15
col lock_level format a8
col owner format a18
col object_name format a32
SELECT /*+ rule */ s.Username,Decode(l.TYPE, 'tm', 'table lock', 'tx', 'row lock', NULL) Lock_Level,
o.Owner, o.Object_Name, s.Sid, s.Serial#
FROM V$session s, V$lock l, Dba_Objects o
WHERE l.Sid = s.Sid
AND l.Id1 = o.Object_Id(+)
AND s.Username IS NOT NULL;
13、 /
SELECT Se.Sid, s.Username, Se.Event, Se.Total_Waits, Se.Time_Waited,Se.Average_Wait
FROM V$session s, V$session_Event Se
WHERE s.Username IS NOT NULL
AND Se.Sid = s.Sid
AND s.Status = 'ACTIVE'
AND Se.Event NOT LIKE '%SQL*Net%'
ORDER BY s.Username;
SELECT s.Sid, s.Username, Sw.Event, Sw.Wait_Time, Sw.State,Sw.Seconds_In_Wait
FROM V$session s, V$session_Wait Sw
WHERE s.Username IS NOT NULL
AND Sw.Sid = s.Sid
AND Sw.Event NOT LIKE '%SQL*Net%'
ORDER BY s.Username;
14、 file_id/block_id
col event format a24
col p1text format a12
col p2text format a12
col p3text format a12
SELECT Sid, Event, P1text, P1, P2text, P2, P3text, P3
FROM V$session_Wait
WHERE Event NOT LIKE '%SQL%'
AND Event NOT LIKE '%rdbms%'
AND Event NOT LIKE '%mon%'
ORDER BY Event;
SELECT NAME, Wait_Time
FROM V$latch l
WHERE EXISTS (SELECT 1
FROM (SELECT Sid, Event, P1text, P1, P2text, P2, P3text, P3
FROM V$session_Wait
WHERE Event NOT LIKE '%SQL%'
AND Event NOT LIKE '%rdbms%'
AND Event NOT LIKE '%mon%') x
WHERE x.P1 = l.Latch#);
15、
col owner format a18
col segment_name format a32
col segment_type format a32
SELECT Owner, Segment_Name, Segment_Type
FROM Dba_Extents
WHERE File_Id = &File_Id
AND &Block_Id BETWEEN Block_Id AND Block_Id + Blocks - 1;
16、 ,
SELECT s.Sid, s.Serial#
FROM V$session s, V$process p
WHERE s.Paddr = p.Addr
AND p.Spid = &1;
Exec Dbms_System.Set_Sql_Trace_In_Session(&1, &2, TRUE);
Exec Dbms_System.Set_Sql_Trace_In_Session(&1, &2, FALSE);
17、 session
SELECT P1.VALUE || '/' || P2.VALUE || '_ora_' || p.Spid || '.ora' Filename
FROM V$process p, V$session s, V$parameter P1, V$parameter P2
WHERE P1.NAME = 'user_dump_dest'
AND P2.NAME = 'instance_name'
AND p.Addr = s.Paddr
AND s.Audsid = Userenv('SESSIONID')
AND p.Background IS NULL
AND Instr(p.Program, 'CJQ') = 0;
18、
SELECT Do.Object_Name, Session_Id, Process, Locked_Mode
FROM V$locked_Object Lo, Dba_Objects Do
WHERE Lo.Object_Id = Do.Object_Id;
19、DB_Cache
SELECT size_for_estimate, buffers_for_estimate, estd_physical_read_factor, estd_physical_reads
FROM V$DB_CACHE_ADVICE
WHERE name = 'DEFAULT'
AND block_size = (SELECT value FROM V$PARAMETER WHERE name = 'db_block_size')
AND advice_status = 'ON';
20、 SGA :SGA,SGASTAT
select substr(name,1,10) name,substr(value,1,10) value
from v$parameter where name = 'log_buffer';
select * from v$sgastat ;
select * from v$sga;
show parameters area_size # , sort_area ;
:V$DB_CACHE_ADVICE、V$SHARED_POOL_ADVICE), PGA
V$PGA_TARGET_ADVICE 。
21、 :
AIX 5L(AIX 4.3.3 )
logon aix as root
cd /usr/samples/kernel
./vmtune ( ) v_pingshm 1
./vmtune -S 1
oracle initSID.ora lock_sga = true
HP UNIX
Root
Create the file "/etc/privgroup": vi /etc/privgroup
Add line "dba MLOCK" to file
As root, run the command "/etc/setprivgrp -f /etc/privgroup":
$/etc/setprivgrp -f /etc/privgroup
oracle initSID.ora lock_sga=true
SOLARIS (solaris2.6 )
8i use_ism = true , SGA ,
lock_sga, lock_sga =true root 。
WINDOWS ( )
lock_sga=true, pre_page_sga=true,
, 。
22、
select value from v$sysstat where name ='physical reads';
select value from v$sysstat where name ='physical reads direct';
select value from v$sysstat where name ='physical reads direct (lob)';
select value from v$sysstat where name ='consistent gets';
select value from v$sysstat where name = 'db block gets';
x = physical reads direct + physical reads direct (lob)
=100 - ( physical reads - x) / (consistent gets + db block gets - x)*100
90%, ;
select sum(pinhits)/sum(pins)*100 "hit radio" from v$librarycache;
95%, ( bind var ) ;
select name,value from v$sysstat where name like '%sort%';
sorts (disk)/ (sorts (memory)+ sorts (disk)) ,
sort_area_size , 。
log_buffer
select name,value from v$sysstat
where name in('redo entries','redo buffer allocation retries');
redo buffer allocation retries/ redo entries 1% log_buffer
/////
July 28
oracle SQL ,
1、
select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
2、
select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
3、
select segment_name, tablespace_name, r.status,
(initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent,
max_extents, v.curext CurExtent
From dba_rollback_segs r, v$rollstat v
Where r.segment_id = v.usn(+)
order by segment_name ;
4、
select name from v$controlfile;
5、
select member from v$logfile;
6、
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$TS_FREE C
WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME;
7、
select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
8、
Select version FROM Product_component_version
Where SUBSTR(PRODUCT,1,6)='Oracle';
9、
Select Created, Log_Mode, Log_Mode From V$Database;
10、 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。
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.
select * from v$locked_object;
select * from v$transaction;
13。 object
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$process p
where s.paddr = p.addr and
s.type = 'USER' and
a.sid = s.sid and
a.object='SUBSCRIBER_ATTR'
order by s.username, s.osuser
14。
select rownum, sys.dba_rollback_segs.segment_name Name, v$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。 (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$process p
where st.sid = s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL'
or s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid asc, s.username asc, s.osuser asc
16。 (lock)
select /*+ RULE */ ls.osuser os_user_name, ls.username user_name,
decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX',
'Transaction enqueue lock', 'UL', 'User supplied lock') lock_type,
o.object_name object, decode(ls.lmode, 1, null, 2, 'Row Share', 3,
'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)
lock_mode, o.owner, ls.sid, ls.serial# serial_num, ls.id1, ls.id2
from sys.dba_objects o, ( select s.osuser, s.username, l.type,
l.lmode, s.sid, s.serial#, l.id1, l.id2 from v$session s,
v$lock l where s.sid = l.sid ) ls where o.object_id = ls.id1 and o.owner
<> 'SYS' order by o.owner, o.object_name
17。 (wait)
SELECT v$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$waitstat.count
18。 sga
SELECT NAME, BYTES FROM SYS.V_$SGASTAT ORDER BY NAME ASC
19。 catched object
SELECT owner, name, db_link, namespace,
type, sharable_mem, loads, executions,
locks, pins, kept FROM v$db_object_cache
20。 V$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$SQLAREA
21。 object
select decode (o.type#,1,'INDEX' , 2,'TABLE' , 3 , 'CLUSTER' , 4, 'VIEW' , 5 ,
'SYNONYM' , 6 , 'SEQUENCE' , 'OTHER' ) object_type , count(*) quantity from
sys.obj$ 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。 object
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。 connection
1)
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) v.sid
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) sid 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. select a.tablespace_name " ",
100-round((nvl(b.bytes_free,0)/a.bytes_alloc)*100,2) " (%)",
round(a.bytes_alloc/1024/1024,2) " (M)",
round(nvl(b.bytes_free,0)/1024/1024,2) " (M)",
round((a.bytes_alloc-nvl(b.bytes_free,0))/1024/1024,2) " (M)",
Largest " (M)",
to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') " "
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.
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. :
select * from v$active_instances;
12:15 PM | Add a comment | Permalink | Blog it | Oracle
ORACLE
:CPU、 、
1. CPU: CPU , ORACLE , CPU , CPU , , CPU , KILL ;
2. : , ORACLE , , I/O I/O , ORACLE , , I/O ORACLE ,
3. :NET*SQL , SQL 。 10M 100 NET*SQL , 、 , 3 。
? OS
OS ,DBA
bufpages
buffer , , bufpages nbuf buffer 。
create_fastlinks
HFS ,
dbc_max_pct
buffer , 。
dbc_min_pct
buffer
desfree
, , (Crash)。
fs_async
, CPU
lotsfree
, 。
maxdsiz
, , 。(32 )
maxdsiz_64bit
maximum process data segment size for 64_bit
Maxssiz
。(32_bit)
maxssiz_64bit
(64_bit)
Maxtsiz
,
maxtsiz_64bit
,
Minfree
Shmem
, 。
Shmmax
, 。
Timeslice
I/O , , I/O CPU , CPU 。 。
unlockable_mem
, , 。
:http://www.zdnet.com.cn/developer/database/story/0,3800066906,39276980,00.htm
11:27 AM | Add a comment | Permalink | Blog it | Oracle
UNIX
1: top .
top cpu , ,
top -n [ ] -f , top -n 1000 -f topsnapshot.log
top
Memory: 2614368K (2249100K) real, 5838616K (5264696K) virtual, 113028K free Page# 1/1
, ,free .
CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU COMMAND
SIZE RES
SIZE: 。
RES:
, , RES .
2:
ipcs -m -b ,-m ,-b , :
T ID KEY MODE OWNER GROUP SEGSZ
SEGSZ . .
3:
HP-UX 1G , .
kmtune , dbc_min_pct dbc_max_pct ,dbc_max_pct 50, 10 .
4: HP-UX glance
glance , ....
11:16 AM | Add a comment | Permalink | Blog it | HPUX
July 27
Oracle (Optimizer)
:
1、 Oracle Optimizer 。
2、 , SQL , 。
3、 FIRST_ROWS、 ALL_ROWS 。
:
Oracle SQL , , 。 (Optimizer) 。 , SQL , , , 。 Pl/sql Developer、Toad , Rule、Choose、First rows、All rows , , , ?
1、
Oracle , (Rule-Based Optimization, RBO) (Cost-Based Optimization, CBO)。
A、RBO : SQL , Oracle 。 , where 。
B、CBO : , (Cost) , Cpu 。 , 。 、 、 。 , analyze , , 。 Oracle8 ,Oracle CBO 。
, , , IO , IO, (full table scan) 。
2、 (Optermizer Mode)
Rule,Choose,First rows,All rows , 。 :
Rule: , 。
Choolse: , Oracle 。 , CBO , , , , , RBO 。
First Rows: Choose , , , 。
All Rows: Cost , , , 。 。
3、
a、Instance
init<SID>.ora OPTIMIZER_MODE=RULE、OPTIMIZER_MODE=CHOOSE、OPTIMIZER_MODE=FIRST_ROWS、OPTIMIZER_MODE=ALL_ROWS 3 , OPTIMIZER_MODE Choose 。
B、Sessions
SQL> ALTER SESSION SET OPTIMIZER_MODE=<Mode>; 。
C、
Hint, :
SQL> SELECT /*+ RULE */ a.userid,
2 b.name,
3 b.depart_name
4 FROM tf_f_yhda a,
5 tf_f_depart b
6 WHERE a.userid=b.userid;
4、 , ? ?
A、
♀ Instance all_rows
♀ ( )
♀ , ,Oracle 。
B、
♀ init<SID>.ora OPTIMIZER_MODE , Rule Choose, 。 4 Hint.
♀
SQL>analyze table table_name delete statistics;
♀ , 。
5、
A、
SQL>SELECT * FROM user_tables
2 WHERE table_name=<table_name>
3 AND num_rows is not null;
SQL>SELECT * FROM user_indexes
2 WHERE table_name=<table_name>
3 AND num_rows is not null;
b、 CBO , , 。
SQL> ANALYZE TABLE table_name COMPUTE STATISTICS;
SQL> ANALYZE INDEX index_name ESTIMATE STATISTICS;
ANALYZE Oracle8i/9i refrence 。
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oracle
oracle sqlplus spool 。 sqlload 。
:
/***************************
* sql demo.sql begin
**************************/
/**************************
* @author meconsea
* @date 20050413
* @msn [email protected]
* @Email [email protected]
**************************/
//##--markup html:html , off
//##--autocommit: insert、update、delete , off
//##--define: , on, '&', , .
set colsep''; //##--
set echo off; //##-- start sql , on
set feedback off; //##-- sql , on
set heading off; //##-- , on
set pagesize 0; //##-- , 24, , 0。
set linesize 80; //##-- , 80
set numwidth 12; //##-- number , 10
set termout off; //##-- , on
set timing off; //##-- sql , off
set trimout on; //##-- , off
set trimspool on; //##-- (spool) , off
spool C:datadmczry.txt;
select trim(czry_dm),trim(swjg_dm),trim(czry_mc) from dm_czry;
spool off;
EOF
/***********************
* demo.sql end
***********************/
sqlload , java sqlload。
sqlload ctl 。 :
/*********************
* meconsea ctl
********************/
load data
infile 'C:datadmczry.txt'
replace into table DM_CZRY
fields terminated by X'09'
(CZRY_DM,SWJG_DM,CZRY_MC)
/********************
* end
* : replace append
*******************/
java :
java bat 。 properties
。
/*************************
* ide properties
************************/
Dserver=test/test@SJJZ
sqlldr=D:\oracle\ora92\bin\SQLLDR.EXE
ctldmczry=C:\data\ctl\dmczry.ctl
txtdmczry=C:\data\dmczry.txt
PropertyBean.java properties 。( !)
DmCzry.java db 。 :
/****************************
*
*
***************************/
..............
sqlldr = pb.getSqlldr();
txt = pb.getTxtdmczry();
ctl = pb.getCtldmczry();
Dserver= pb.getDserver();
Process processCmd = Runtime.getRuntime().exec(sqlldr+" "+cmdStr);
.............
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Oracle 、
:
Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name
:
Select Tablespace_Name,Sum(bytes)/1024/1024 From Dba_Segments Group By Tablespace_Name
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July 22
Oracle
Oracle
VARCHAR2(size)
NVARCHAR2(size)
, size 。size 4000, 1。 VARCHAR2 size。
, , size 。size , 4000 。 NVARCHAR2 size。
NUMBER(p,s)
p s 。 p 1 38。 s -84 127。
LONG
, 2G 231 –1 。
DATE
4712 1 1 4712 12 31 。
RAW(size)
size 。size 2000 。 RAW size。
LONG RAW
, 2G 。
CHAR(size)
NCHAR(size)
, size 。size 2000 。 size 。
, size 。size , 2000 。 size , 。
CLOB
NCLOB
, 。 。 4G 。
, 。 。 4G 。 。
BLOB
。 4G 。
BFILE
, 。 I/O LOB。 4G 。
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July 19
ORACLE
ORACLE :
0:none
1:null
2:Row-S (RS):
3:Row-X (RX):
4:Share (S): DML
5:S/Row-X (SRX):
6:exclusive (X):
, 。
select ... from ... ; 2 , v$locked_object 。
select ... from ... for update; 2 。
for update ,
(Row-X) ,
, update、delete select...for update 。
insert / update / delete ... ; 3 。
commit ,
3 3 , 。
3,4 。
locked_mode 2,3,4 DML(insert,delete,update,select) ,
DDL(alter,drop ) ora-00054 。
update / delete ... ; 4,5 。
DDL 6 。
DBA , SQL :
select object_id,session_id,locked_mode from v$locked_object;
select t2.username,t2.sid,t2.serial#,t2.logon_time
from v$locked_object t1,v$session t2
where t1.session_id=t2.sid order by t2.logon_time;
, 。
SQL :
alter system kill session 'sid,serial#';
, DML 。
,
OS $kill process_num $kill -9 process_num ,
, OS 。
alter system kill session 'sid,serial#'; 。
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July 18
STATSPAGK ORACLE
、
DBA ,latch free wait time 。ORACLE STATSPACK( BSTAT/ESTAT) DBA 。 ? ? YAPP , STATSPACK , 。
、YAPP
YAPP , :
Response time = service time + wait time
。 CPU , 。 SQL ,CPU buffer cache , , ORACLE , 。
YAPP service time,wait time , 。 IO , ‘ , ’, SQL CPU 20 , ‘ latchwait time 20 ’ 。 YAPP , ( ) ( )。 YAPP , :
(1)、
(2)、
(3)、
(4)、 ,
STATSPACK bstat/estat 。 , service wait , IO , OS , service ( CPU) , :
Response time = time compnent1+….+time componentn
, , 。 ORACLE instance , :client ( SQLPLUS,TUXEDO), ( LOCAL = NO ), ( DBWR)。
、ORACLE
ORACLE ( ) CPU (service time) , SGA, V$▁ 。 session system , V$SYSTEM▁EVENT V$SYSSTAT 。ORACLE STATSPACK ( BSTAT/ESTAT) , 。 ORACLE ,DBA INIT.ORA TIMED▁STATISTICS TRUE ALTERSYSTEM TRUE。8i 1/100 。9i 1/1,000,000 ( )。 system , session 。
, V$SYSTEM▁EVENT,V$SYSSTAT,V$LATCH,V$SQLAREA。V$SYSSTAT CPU ,V$SYSTEM▁EVENT ,V$SQLAREA SQL , V$LATCH LATCH 。 Sewer Reference Mannual
、 STATSPACK
V$▁ , 。 , 。ORACLE STATSPACK , ORACLE JOB 。 ,DBA STATSPACK SPREPORT 。STATSPACK , 。
1、 STATSPACK
YAPP ( ) 。 sevice time ,service time V$SYSSTAT V$SYSTEM▁EVENT 。 STATSPACK '''' Instance Activity Stats for DB '''' '''' Wait Eventsfor DB '''' 。 :
CPU used by this session Total CPU time spent.
Recursive cpu usage
Time spent doing recursive work in the foreground .
This includes data dictionary lookup and any PL /SQL work, including time spent
by SQL inside
PL/SQL parse time cpu
CPU time spent parsing SQL statements
Recursive cpu usage parse time cpu CPU CPU used by this session , CPU other CPU
wait time , '''' Top5Wait Events '''' 5 , '''' Wait events for DB '''' 。
STATSPACK , YAPP :
(1)、 parse time cpu
(2)、 CPU used by this session , parse time cpu, other CPU
(3)、
(4)、 1—3 ,
(5)、 latch free, Tuning possibilities for wait events
(6)、 latch free, Tuning possibilities for latches
(7)、 CPU , Tuning possibilities for CPU
2、Tuning possibilities for CPU
recursive cpu usage PLSQL , , PLSQL, 。 CPU PLSQL 。 PLSQL SQL, recursive cpu usage 。
parse time cpu (parsing)SQL , SQL 。 , MAXOPENCURSORS 。V$SQL PARSE▁CALLS EXECUTIONS parse 。
Other cpu CPU 。 ,SQL CPU , V$SQL buffer gets SQL , STATSPACK , '''' SQL ordered by Gets for DB ''''。 SQL 。 bstat /estat SQL , V$SQLAREA, buffer gets 。9i V$SQL CPU▁T|ME , 。
3、Tuning possibilities for wait events
db file scattered read ORACLE , , 。i n i t .o r a db▁ file▁mutiblock▁read▁count , 。 4—16, 。 DB▁BLOCK▁SlZE 。 db file scattered read , IO ( , IO ), ( SQL )。 IO 。
db file sequential read ORACLE , 。 db file sequential read , IO ( , IO ), 。 IO 。
buffer busy waits ( ) 。 free lists , , ,V$WA|TSTAT
STATSPACK 。
latch free 。
Enqueue , SEELECT ... FOR UPDATE。 , , 。 , V$LOCK 。
log file sync , LGWR LOG▁BUFFER , , COMMIT , IO , '''' log buffer parallel write '''' , IO CPU 。
free buffer wait SESSION , 。 DBWR 。 IO DBWR , IO , 。
rdbms ipc message , 。''''
pmon timer
smon timer
SQL*Net message
from client
Tuning possibilities for latches
shared pool parsing, hard parsing 。 BIND , latch ,8.1.6 init.ora cursor▁sharing force hard parsing latch , , 。
library cache soft parsing hard parsing latch, , 。 init.ora cursor▁sharing force soft parsing hard parsing library cache。 session▁cached▁cursors session soft parsing library cache 。 cursor▁space▁for▁time=true。
mw cache row cache , 。hard parsing row cache 。 init.ora cursor▁sharing force 。
cache buffer chain hash chain, 。 l|atch 。 X$BH hash chain , ( root index block) 。
cache buffer lru chain LRU 。 cache buffer lru chain db▁ block▁lru▁latches 。
4、Tuning possibilities for I/O
db file scattered/sequential read file write(DBWR/LGWR) , IO 。STATSPACK ''''Tablespace IO Summary for DB'''' lO rate。 '''' file IO Statistics for DB'''' IO rate。 IO rate , IO 。 IO rate ( cache 2—10ms IO 5—20ms) IO rate , IO 。 IO , IO ( SQL)。 IO rate , IO , , ( RAID5), IO 。
、
ORACLE , :
·ORACLE 8i 1/100 , | 。 , 。 9i ( 1/1,000,000 )。
·ORACLE CPU ,CPU used by this session , CPU , PLSQL, , 。 , OLTP , DSS 。
·V$SYSSTAT , CPU , ( DBWR,LGWR) CPU, 。
· 。 SQL*NET , 。
·YAPP ORACLE , ORACLE , ORACLE 。
、IBSTAT/ESTAT
STATSPACK 8.1.6 , BSTAT/ESTAT, :
·BSTAT/ESAT DBA ORACLE JOB , 。
·BSTAT/ESAT SQL , OTHER CPU , V$SQL SQL。
· TOP5 WAIT EVENT, 。
[ ]
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Oracle
, Oracle DBA , 、 , Select , , Oracle 。 (waits) , IO, , Oracle 、 , , Unix 。
、 , CPU、 、 、 , , , cpu IO 。 (cpu、 ) 。
1、 IO ? sar, 。
Rp1#Sar -u 2 10
2 , 20 , 。
:
HP-UX hpn2 B.11.00 U 9000/800 08/05/03
18:26:32 %usr %sys %wio %idle
18:26:34 80 9 12 0
18:26:36 78 11 11 0
18:26:38 78 9 13 1
18:26:40 81 10 9 1
18:26:42 75 10 14 0
18:26:44 76 8 15 0
18:26:46 80 9 10 1
18:26:48 78 11 11 0
18:26:50 79 10 10 0
18:26:52 81 10 9 0
Average 79 10 11 0
%usr cpu ,%sys cpu ,%wio io , ,%idle 。 wio , 35% , IO , CPU IO 。Idle CPU 。 , wio 11 io , idle , cpu 。
IO ,
♀ , hp-ux 。
♀ Oracle sql ,
♀ Oracle , , 。
2、 。
vmstat, hp-unix glance,Aix topas, vmstat pi ,memory free ,glance,topas 80% , , 。
♀ Oracle 1/2, 40% 。
♀
♀ , MTS
♀ , 。
3、 Oracle session 。
Hp-unix glance,top
IBM AIX topas
ps 。
, sql pid sql, sql pl/sql developer,toad , <> spid spid 。
SELECT a.username,
a.machine,
a.program,
a.sid,
a.serial#,
a.status,
c.piece,
c.sql_text
FROM v$session a,
v$process b,
v$sqltext c
WHERE b.spid=<spid>
AND b.addr=a.paddr
AND a.sql_address=c.address(+)
ORDER BY c.piece
sql , , , IO , 。
: sql , in , exists , Oracle In Or , 。
:
SELECT col1,col2,col3 FROM table1 a
WHERE a.col1 not in (SELECT col1 FROM table2)
:
SELECT col1,col2,col3 FROM table1 a
WHERE not exists
(SELECT 'x' FROM table2 b
WHERE a.col1=b.col1)
4、 : sql.
SELECT * FROM
(
SELECT PARSING_USER_ID
EXECUTIONS,
SORTS,
COMMAND_TYPE,
DISK_READS,
sql_text
FROM v$sqlarea
ORDER BY disk_reads DESC
)
WHERE ROWNUM<10 ;
、 Oracle Server , v$session_wait , session , IO。 :
: io session
SELECT se.sid,
se.serial#,
pr.SPID,
se.username,
se.status,
se.terminal,
se.program,
se.MODULE,
se.sql_address,
st.event,
st.p1text,
si.physical_reads,
si.block_changes
FROM v$session se,
v$session_wait st,
v$sess_io si,
v$process pr
WHERE st.sid=se.sid
AND st.sid=si.sid
AND se.PADDR=pr.ADDR
AND se.sid>6
AND st.wait_time=0
AND st.event NOT LIKE '%SQL%'
ORDER BY physical_reads DESC
:
1、 session , IO 。
2、 , ?
Select sql_address from v$session where sid=<sid>;
Select * from v$sqltext where address=<sql_address>;
session 。
alter system kill session 'sid,serial#'; session 。
3、 event , , event :
a、buffer busy waits,free buffer waits dbwr , IO , v$session_wait free buffer wait , dbwr , ;free buffer wait , , dbwr , wio , :
a.1 , db_block_lru_latches
:
db_writer_processes=4
db_block_lru_latches=8
a.2 IO,IBM ,hp , Hp 。
b、db file sequential read, , , , 、sql , db_file_multiblock_read_count 。
c、db file scattered read, , db_file_multiblock_read_count 。
d、latch free, , 。
e、 。
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