首页 > 数据库> 文章详细

(转)oracle 数据库性能健康检查脚本

2021-04-13 15:01:36 阅读：129 来源： 互联网

标签：name FORMAT ## 数据库 value SELECT oracle 健康检查 pool

转至：https://blog.csdn.net/cm_0205/article/details/100210526?utm_medium=distribute.pc_relevant_download.none-task-blog-baidujs-1.nonecase&depth_1-utm_source=distribute.pc_relevant_download.none-task-blog-baidujs-1.nonecase

*******************os层检查

#检查oracle进程
ps -ef|grep ora|wc -l

crs_stat -t -v
top
glance
crsctl check cluster (cssd)

vmstat 3600 6

***********************查看基本信息
#database 概况信息检查
#检查database基本信息
select * from v$version;
select name ,open_mode,log_mode from v$database;
select instance_number,instance_name ,status from gv$instance;
show parameter cpu_c
show parameter block_size
select group#,thread#,members,bytes/1024/1024 from gv$log;
show sga
select count(*) from v$controlfile
select count(*) from v$tempfile;
select count(*) from v$datafile;

********************************查看数据文件信息

#检查表空间数据文件信息
col tablespace_name for a30
select tablespace_name , sum(bytes)/1024/1024 from dba_temp_files group by tablespace_name;
#检查表空间
SELECT TABLESPACE_NAME,EXTENT_MANAGEMENT,ALLOCATION_TYPE,SEGMENT_SPACE_MANAGEMENT FROM DBA_TABLESPACES;

#检查数据文件状态
select count(*),status from v$datafile group by status;

#检查表空间使用情况
select
f.tablespace_name,
a.total,
f.free,(a.total-f.free)/1024 "used SIZE(G)"
,round((f.free/a.total)*100) "% Free"
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 "% Free"
/

#查询临时segment使用情况
COL username FORMAT a10;
COL segtype FORMAT a10;
SELECT username, segtype, extents "Extents Allocated"
,blocks "Blocks Allocated"
FROM v$tempseg_usage;

#查看数据文件信息,若文件较多可以根据需要字段进行排序输出top 10
SELECT fs.phyrds "Reads", fs.phywrts "Writes"
,fs.avgiotim "Average I/O Time", df.name "Datafile"
FROM v$datafile df, v$filestat fs WHERE df.file# = fs.file#;

#查看所有数据文件i/o情况,若文件太多,可以改写为top 10 select *( order by xx desc) where rownum<=10
COL ts FORMAT a10 HEADING "Tablespace";
COL reads FORMAT 999990;
COL writes FORMAT 999990;
COL br FORMAT 999990 HEADING "BlksRead";
COL bw FORMAT 999990 HEADING "BlksWrite";
COL rtime FORMAT 999990;
COL wtime FORMAT 999990;
SELECT ts.name AS ts, fs.phyrds "Reads", fs.phywrts "Writes"
,fs.phyblkrd AS br, fs.phyblkwrt AS bw
,fs.readtim "RTime", fs.writetim "WTime"
FROM v$tablespace ts, v$datafile df, v$filestat fs
WHERE ts.ts# = df.ts# AND df.file# = fs.file#
UNION
SELECT ts.name AS ts, ts.phyrds "Reads", ts.phywrts "Writes"
,ts.phyblkrd AS br, ts.phyblkwrt AS bw
,ts.readtim "RTime", ts.writetim "WTime"
FROM v$tablespace ts, v$tempfile tf, v$tempstat ts
WHERE ts.ts# = tf.ts# AND tf.file# = ts.file# ORDER BY 1;

#查看所有数据文件i/o情况(比率),若文件太多,可以改写为top 10 select *( order by xx desc) where rownum<=10
COL ts FORMAT a10 HEADING "Tablespace";
COL reads FORMAT 999990;
COL writes FORMAT 999990;
COL br FORMAT 999990 HEADING "BlksRead";
COL bw FORMAT 999990 HEADING "BlksWrite";
COL rtime FORMAT 999990;
COL wtime FORMAT 999990;
SELECT ts.name AS ts, fs.phyrds "Reads", fs.phywrts "Writes"
,fs.phyblkrd AS br, fs.phyblkwrt AS bw
,fs.readtim "RTime", fs.writetim "WTime"
FROM v$tablespace ts, v$datafile df, v$filestat fs
WHERE ts.ts# = df.ts# AND df.file# = fs.file#
UNION
SELECT ts.name AS ts, ts.phyrds "Reads", ts.phywrts "Writes"
,ts.phyblkrd AS br, ts.phyblkwrt AS bw
,ts.readtim "RTime", ts.writetim "WTime"
FROM v$tablespace ts, v$tempfile tf, v$tempstat ts
WHERE ts.ts# = tf.ts# AND tf.file# = ts.file# ORDER BY 1;

#获取top 10 热segment

col objct_name for a30
select * from
(select
ob.owner, ob.object_name, sum(b.tch) Touchs
from x$bh b , dba_objects ob
where b.obj = ob.data_object_id
and b.ts# > 0
group by ob.owner, ob.object_name
order by sum(tch) desc)
where rownum <=10

#判断物理读最多的object
select * from (select owner,object_name,value from v$segment_statistics where statistic_name='physical reads' order by value desc) where rownum<=10

#查看热点数据文件(从单块读取时间判断)

SELECT t.file_name,
t.tablespace_name,
round(s.singleblkrdtim / s.singleblkrds, 2) AS CS,
s.READTIM,
s.WRITETIM
FROM v$filestat s, dba_data_files t
WHERE s.file# = t.file_id and rownum<=10 order by cs desc

******************************查看redo

#检查日志切换频率
select sequence#,to_char(first_time,'yyyymmdd_hh24:mi:ss') firsttime,round((first_time-lag(first_time) over(order by first_time))*24*60,2) minutes from v$log_history where first_time > sysdate - 1 order by first_time ,minutes;

#检查lgwr i/o性能 (time_waited/total_waits：表示平均lgwr写入完成时间若>1表示写入过慢)
select total_waits,time_waited,average_wait,time_waited/total_waits as avg from v$system_event where event = 'log file parallel write';

#检查与redo相关性能指标
select name,value from v$sysstat where name like '%redo%';

#查询redo block size
select max(lebsz) from x$kccle;

#查看redo allocation latch
col name for a30
select name,gets,misses,misses/gets from v$latch_children where name='redo allocation';

#查看与redo相关等待事件
col event format a40
select event,total_waits,total_timeouts,average_wait from v$system_event where upper(event) like'%REDO%';

#查看session redo event
select event,total_waits,total_timeouts,average_wait from v$session_event where upper(event) like'%REDO%';

#查看user commit次数
select to_number(value,99999999999) from v$sysstat where name='user commits';

#查看系统运行时间
select (sysdate - startup_time)*24*60*60 as seconds from v$instance

#计算出每秒用户提交次数
select user_commit次数/系统运行时间 from dual;

#计算出每个事务平均处理多少个redo block
select value from v$sysstat where name = 'redo blocks written';
select a.redoblocks/b.trancount from (select value redoblocks from v$sysstat where name='redo blocks written') a ,(select value trancount from v$sysstat where name='user commits') b
'

***************************sga,pga,命中率

# sga,pga,命中率
#检查sga
show sga
select * from v$sga;

#查看buffer cache 命中率
select 1-(sum(decode(name, 'physical reads', value, 0))/
(sum(decode(name, 'db block gets', value, 0))+
(sum(decode(name, 'consistent gets', value, 0))))) "Buffer Hit Ratio"
from v$sysstat;

#查看buffer cache建议
select size_for_estimate, estd_physical_read_factor, to_char(estd_physical_reads,99999999999999999999999) as"estd_physical_reads" from v$db_cache_advice where name = 'DEFAULT';

COL pool FORMAT a10;
SELECT (SELECT ROUND(value/1024/1024,0) FROM v$parameter
WHERE name = 'db_cache_size') "Current Cache(Mb)"
,name "Pool", size_for_estimate "Projected Cache(Mb)"
,ROUND(100-estd_physical_read_factor,0) "Cache Hit Ratio%"
FROM v$db_cache_advice
WHERE block_size = (SELECT value FROM v$parameter
WHERE name = 'db_block_size')
ORDER BY 3;

#查看pga
show parameter pga

#查看cache 池
show parameter cache

#查看buffer cache中defalut pool 命中率
select name,1-(physical_reads)/(consistent_gets+db_block_gets)
from v$buffer_pool_statistics;

#检查shared pool

show parameter shared

#检查shared pool中library cache

select namespace,pinhitratio from v$librarycache;

#检查整体命中率(library cache)
select sum(pinhits)/sum(pins) from v$librarycache;

select sum(pins) "hits",
sum(reloads) "misses",
sum(pins)/(sum(pins)+sum(reloads)) "Hits Ratio"
from v$librarycache;

#检查shered pool free space
SELECT * FROM V$SGASTAT
WHERE NAME = 'free memory'
AND POOL = 'shared pool';

#检查row cache(数据字典缓冲区)命中率
#当执行一个dml或ddl都会造成对数据字典的递归修改
column updates format 999,999,999
SELECT parameter
, sum(gets)
, sum(getmisses)
, 100*sum(gets - getmisses) / sum(gets) pct_succ_gets
, sum(modifications) updates
FROM V$ROWCACHE
WHERE gets > 0
GROUP BY parameter;

SELECT (SUM(GETS - GETMISSES - FIXED)) / SUM(GETS) "ROW CACHE" FROM V$ROWCACHE;

#查看Shared pool latch(多池技术)

col parameter for a20
col session for a20
select a.ksppinm "Parameter",
b.ksppstvl "Session Value",
c.ksppstvl "Instance Value"
from sys.x$ksppi a, sys.x$ksppcv b, sys.x$ksppsv c
where a.indx = b.indx and a.indx = c.indx
and a.ksppinm = '_kghdsidx_count';

#每个子shared pool由单独的shared pool latch保护查看他们的命中率
shared pool latch，用于shared pool空间回收分配使用的latch

col name format a15
select addr,name,gets,misses,1-misses/gets from v$latch_children where name='shared pool';

#查看shared pool建议

column c1 heading 'Pool |Size(M)'
column c2 heading 'Size|Factor'
column c3 heading 'Est|LC(M) '
column c4 heading 'Est LC|Mem. Obj.'
column c5 heading 'Est|Time|Saved|(sec)'
column c6 heading 'Est|Parse|Saved|Factor'
column c7 heading 'Est|Object Hits' format 999,999,999
SELECT shared_pool_size_for_estimate c1,shared_pool_size_factor c2,
estd_lc_size c3,estd_lc_memory_objects c4,estd_lc_time_saved c5,
estd_lc_time_saved_factor c6,to_char(estd_lc_memory_object_hits,99999999999) c7 FROM V$SHARED_POOL_ADVICE;

#使用 v$shared_pool_advice 算不同shared pool大小情况下，响应时间，S单位

SELECT 'Shared Pool' component,
shared_pool_size_for_estimate estd_sp_size,
estd_lc_time_saved_factor parse_time_factor,
CASE
WHEN current_parse_time_elapsed_s + adjustment_s < 0 THEN
0
ELSE
current_parse_time_elapsed_s + adjustment_s
END response_time
FROM (SELECT shared_pool_size_for_estimate,
shared_pool_size_factor,
estd_lc_time_saved_factor,
a.estd_lc_time_saved,
e.VALUE / 100 current_parse_time_elapsed_s,
c.estd_lc_time_saved - a.estd_lc_time_saved adjustment_s
FROM v$shared_pool_advice a,
(SELECT * FROM v$sysstat WHERE NAME = 'parse time elapsed') e,
(SELECT estd_lc_time_saved FROM v$shared_pool_advice
WHERE shared_pool_size_factor = 1) c)
/

#查看shared pool中各种类型的chunk的大小数量

SELECT KSMCHCLS CLASS, COUNT(KSMCHCLS) NUM, SUM(KSMCHSIZ) SIZ,
To_char( ((SUM(KSMCHSIZ)/COUNT(KSMCHCLS)/1024)),'999,999.00')||'k' "AVG SIzE"
FROM X$KSMSP GROUP BY KSMCHCLS;

#查看是否有库缓冲有关的等待事件
select sid,seq#,event,p1,p1raw,p2,p2raw,p3,p3raw,state from v$session_wait where event like 'library%';

#row cache命中率
SELECT 'Dictionary Cache Hit Ratio ' "Ratio"
,ROUND((1 - (SUM(GETMISSES) / SUM(GETS))) * 100,2)||'%'
"Percentage"
FROM V$ROWCACHE;

#library cache中详细比率信息
SELECT 'Library Lock Requests' "Ratio"
, ROUND(AVG(gethitratio) * 100, 2)
||'%' "Percentage" FROM V$LIBRARYCACHE
UNION
SELECT 'Library Pin Requests' "Ratio", ROUND(AVG(pinhitratio)
* 100, 2)
||'%' "Percentage" FROM V$LIBRARYCACHE
UNION
SELECT 'Library I/O Reloads' "Ratio"
, ROUND((SUM(reloads) / SUM(pins)) * 100, 2)
||'%' "Percentage" FROM V$LIBRARYCACHE
UNION
SELECT 'Library Reparses' "Ratio"
, ROUND((SUM(reloads) / SUM(pins)) * 100, 2)
||'%' "Percentage" FROM V$LIBRARYCACHE;

#查询sga中各个pool 情况
COL name FORMAT a32;
SELECT pool, name, bytes FROM v$sgastat
WHERE pool IS NULL
OR pool != 'shared pool' OR (pool = 'shared pool'
AND (name IN('dictionary cache','enqueue','library
cache','parameters',
'processes','sessions','free memory')))
ORDER BY pool DESC NULLS FIRST, name;

SELECT * FROM V$SGAINFO;

#查看使用shard_pool保留池情况
SELECT request_misses, request_failures, free_space
FROM v$shared_pool_reserved;

#Oracle专门从共享池内置出一块区域来来分配内存保持这些大块。这个保留共享池的默认大小是共享池的5%(_shared_pool_reserved_pct 5 控制) oracle建设置为10%。大小通过参数SHARED_POOL_RESERVED_SIZE改。它是从共享池中分配，不是直接从SGA中分配的，它是共享池的保留部分，专门用于存储大块段
#shared pool中内存大于_SHARED_POOL_RESERVED_MIN_ALLOC 将放入shared pool保留池,保留池维护一个单独的freelist,lru，并且不会在lru列表存recreatable类型chunks，普通shared pool的释放与shared pool保留池无关。
#关于设置SHARED_POOL_RESERVED_SIZE
#1.如果系统出现ora-04031,发现请求内存都是大于 _SHARED_POOL_RESERVED_MIN_ALLOC (default 10GR2 4400) ,且v$shared_pool_reserved中有大量 REQUEST_MISSES(并且可以看下 LAST_MISS_SIZE ) 表示 SHARED_POOL_RESERVED_SIZE太小了需要大的内存的请求失败,那么需要加大 SHARED_POOL_RESERVED_SIZE
#2.如果ora-04031请求内存出现在4100-4400并造成shared pool lru合并,老化换出内存 ,可以调小 _SHARED_POOL_RESERVED_MIN_ALLOC 让此部分内存进入 shared reserved pool,相应的加大SHARED_POOL_RESERVED_SIZE
#3.从v$shared_pool_reserved来判断, 如果REQUEST_FAILURES>0(出现过ora-04031)且LAST_FAILURE_SIZE(最后请求内存大小)>_SHARED_POOL_RESERVED_MIN_ALLOC 表示shared reserved pool 缺少连续内存,可以加大SHARED_POOL_RESERVED_SIZE,减少 _SHARED_POOL_RESERVED_MIN_ALLOC 少放对象,并相对加大shared_pool_size
#要是反过来 REQUEST_FAILURES>0(出现过ora-04031)且LAST_FAILURE_SIZE(最后请求内存大小)<_SHARED_POOL_RESERVED_MIN_ALLOC,表示在 shared pool中缺少连续内存,可以加减少_SHARED_POOL_RESERVED_MIN_ALLOC多放入一些对象,减少shared pool压力,适当加大shared_pool_size,SHARED_POOL_RESERVED_SIZE

#从library中获取执行次数最多的top 10 sql 查看他们的具体信息 (未含解析次数)
COL execs FORMAT 9999990
COL parses FORMAT 99990
COL fetches FORMAT 999990
COL loads FORMAT 9990
COL invalids FORMAT 9999990
COL i/o FORMAT 99990
COL hits FORMAT 9999990
COL rows FORMAT 999990
COL sorts FORMAT 9990
COL sql FORMAT a32
SELECT * FROM(
SELECT executions "Execs"--Executions
,parse_calls "Parses"--Parses
,fetches "Fetches"--Fetches
,loads"Loads"--Loads and reloads
,invalidations "Invalids"--Invalidations
,disk_reads "I/O"--I/O
,buffer_gets "Hits"--Buffer hits
,rows_processed "Rows"--Rows
,sorts"Sorts"--Sorts
,sql_text "SQL"
FROM v$sqlarea
ORDER BY executions DESC
) WHERE ROWNUM <= 10;

#查询还保留在library cache中，解析次数和执行次数最多的sql(解析*执行)
COL sql_text FORMAT A38;
SELECT * FROM(
SELECT parse_calls*executions "Product", parse_calls
"Parses"
,executions "Execs", sql_text FROM v$sqlarea ORDER BY 1 DESC)
WHERE ROWNUM <= 10;

#查看shared pool中,row cache详细信息
SELECT COUNT "Entries", GETS "Requests", GETMISSES "Misses"
,MODIFICATIONS "DML Activity", parameter "Area"
FROM v$rowcache;

#DBMS_SHARED_POOL.[UN]KEEP (object, type);

#查看shared pool建议
SELECT (SELECT ROUND(value/1024/1024,0) FROM v$parameter
WHERE name = 'shared_pool_size') "Current Mb"
, shared_pool_size_for_estimate "Projected Mb"
, ROUND(shared_pool_size_factor*100) "%"
, ESTD_LC_SIZE "Library Mb"
, ESTD_LC_TIME_SAVED "Parse Savings"
,to_char(ESTD_LC_MEMORY_OBJECT_HITS,'999999999999') "Hits"
FROM v$shared_pool_advice
ORDER BY 1;

#查看library cache 内存分配情况(对哪类对象)
SELECT lc_namespace "Library"
,LC_INUSE_MEMORY_OBJECTS "Objects"
,LC_INUSE_MEMORY_SIZE "Objects Mb"
,LC_FREEABLE_MEMORY_OBJECTS "Freeable Objects"
,LC_FREEABLE_MEMORY_SIZE "Freeable Mb"
FROM v$library_cache_memory;

#查看pga
show parameters area_size
# 查看pga
SELECT * FROM v$pgastat;

查看pga建议
SELECT (SELECT ROUND(value/1024/1024,0) FROM v$parameter
WHERE name = 'pga_aggregate_target') "Current Mb"
, ROUND(pga_target_for_estimate/1024/1024,0) "Projected Mb"
, ROUND(estd_pga_cache_hit_percentage) "%"
FROM v$pga_target_advice
ORDER BY 2;

#Database read buffer cache hit ratio =
#1 – (physical reads / (db block gets + consistent gets))

SELECT to_char(value,'9999999999999'), name FROM V$SYSSTAT WHERE name IN
('physical reads', 'db block gets', 'consistent gets');

#查询数据库命中率
SELECT 'Database Buffer Cache Hit Ratio ' "Ratio"
, ROUND((1-
((SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'physical reads')
/ ((SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'db block gets')
+ (SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'consistent gets')
))) * 100)||'%' "Percentage"
FROM DUAL;

# alter table xx cache

#查看cache中所有pool,命中情况

COL pool FORMAT a10;
SELECT a.name "Pool", a.physical_reads, a.db_block_gets
, a.consistent_gets
,(SELECT ROUND((1-(physical_reads / (db_block_gets + consistent_gets)))*100)
FROM v$buffer_pool_statistics
WHERE db_block_gets+consistent_gets != 0
AND name = a.name) "Ratio"
FROM v$buffer_pool_statistics a;

#ALTER TABLE(INDEX) xx STORAGE(BUFFER_POOL KEEP);

# 查看数据库cache或keep了哪些object
COL table_name FORMAT A16
COL index_name FORMAT A16
SELECT table_name AS "Table", NULL, buffer_pool, cache FROM
user_tables
WHERE buffer_pool != 'DEFAULT' OR TRIM(cache)='Y'
UNION
SELECT table_name, index_name, NULL, buffer_pool FROM
user_indexes
WHERE buffer_pool != 'DEFAULT'
ORDER BY 1, 2 NULLS FIRST;

#取消cache或keep(keep pool)
#ALTER TABLE XX NOCACHE;
#SELECT 'ALTER INDEX '||index_name||' STORAGE(BUFFER_POOL DEFAULT);'
#FROM USER_INDEXES WHERE BUFFER_POOL!='DEFAULT';

**********************************************

#检查undo
show parameter undo_
#检查undo rollback segment 使用情况
select name ,rssize,extents,latch,xacts,writes,gets,waits from v$rollstat a,v$rollname b where a.usn=b.usn order by waits desc;

select a.redoblocks/b.trancount from (select value redoblocks from v$sysstat where name='redo blocks written') a ,(select value trancount from v$sysstat where name='user commits') b;

#计算每秒钟产生的undoblk数量
select sum(undoblks)/sum((end_time-begin_time)*24*60*60) from v$undostat;

#Undospace=UR*UPS*blocksize + overload(10%),计算undo tablespace大小
show parameter block_size
show parameter undo_retention
#select undo_retention*每秒产生undoblk数量*block_size/1024/1024/1024+ (1+1undo_retention*每秒产生undoblk数量*block_size/1024/1024/1024*0.1) from dual;

#查询undo具体信息

COL undob FORMAT 99990;
COL trans FORMAT 99990;
COL snapshot2old FORMAT 9999999990;
SELECT undoblks "UndoB", txncount "Trans"
,maxquerylen "LongestQuery", maxconcurrency "MaxConcurrency"
,ssolderrcnt "Snapshot2Old", nospaceerrcnt "FreeSpaceWait"
FROM v$undostat;

#查询rollback 段详细信息(收缩次数,扩展次数,平均活动事务等)
COL RBS FORMAT a4;
SELECT n.name "RBS", s.extends "Extends", s.shrinks
"Shrinks"
,s.wraps "Wraps", s.aveshrink "AveShrink"
,s.aveactive "AveActive"
FROM v$rollname n JOIN v$rollstat s USING(usn)
WHERE n.name != 'SYSTEM';

#查询当前rollback segment使用情况
COL RBS FORMAT a4;
SELECT n.name "RBS", s.status, s.waits, s.gets, to_char(s.writes,'9999999999999')
,s.xacts "Active Trans"
FROM v$rollname n JOIN v$rollstat s USING(usn)
WHERE n.name != 'SYSTEM';

#查询使用rollback segment时等待比率
SELECT ROUND(SUM(waits/gets)*100,2)||'%' "Contention" FROM
v$rollstat;

#查询使用rollback segment时等待比率及其平局活动事务数
COL contention FORMAT 9999999990;
SELECT AVG(xacts) "Trans per RBS"
,ROUND(SUM(waits/gets)*100,2)||'%' "Contention"
FROM v$rollstat;

******************************** 查看其它性能指标信息(等待事件,latch等,排序,解析,index使用率)

#查看数据库中行chain
SELECT 'Chained Rows ' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT
WHERE name = 'table fetch continued row')
/ (SELECT SUM(value) FROM V$SYSSTAT
WHERE name IN ('table scan rows gotten', 'table fetch by
rowid'))
* 100, 3)||'%' "Percentage"
FROM DUAL;

#在内存中排序比率(最优排序)
SELECT 'Sorts in Memory ' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'sorts (memory)')
/ (SELECT SUM(value) FROM V$SYSSTAT
WHERE name IN ('sorts (memory)', 'sorts (disk)')) * 100, 5)
||'%' "Percentage"
FROM DUAL;

#查询解析比率

SELECT 'Soft Parses ' "Ratio"
, ROUND(
((SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'parse count (total)')
- (SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'parse count (hard)'))
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'execute count')
* 100, 2)||'%' "Percentage"
FROM DUAL
UNION
SELECT 'Hard Parses ' "Ratio"
, ROUND((SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'parse count (hard)')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'execute count') * 100, 2)||'%' "Percentage"
FROM DUAL
UNION
SELECT 'Parse Failures ' "Ratio"
, ROUND((SELECT SUM(value) FROM V$SYSSTAT
WHERE name = 'parse count (failures)')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'parse count (total)')* 100, 5)||'%' "Percentage" FROM DUAL;

#查看与latch有关的event信息

COL event FORMAT a20;
COL waits FORMAT 9999990;
COL timeouts FORMAT 99999990;
COL average FORMAT 99999990;
SELECT event "Event", time_waited "Total Time", total_waits
"Waits"
,average_wait "Average", total_timeouts "Timeouts"
FROM V$SYSTEM_EVENT
WHERE event = 'latch free'
ORDER BY EVENT;

#查看数据库中查询时主要访问方式,获取大表小表访问比率(2个表的访问算法不同)
#table scans (long tables)过多的话,一般db file scattered read比较显著
#_small_table_threshold来定义大表和小表的界限。缺省为2%的Buffer数量 ,>这个参数为大表
#default 大表的全表扫描会被置于LRU的末端(最近最少使用,冷端)，以期尽快老化(让其尽快换出buffer cache)，减少Buffer的占用

#查看大表小表扫描对应的值
SELECT value, name FROM V$SYSSTAT WHERE name IN
('table fetch by rowid', 'table scans (short tables)'
, 'table scans (long tables)');

SELECT 'Short to Long Full Table Scans' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT
WHERE name = 'table scans (short tables)')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name IN
('table scans (short tables)', 'table scans (long tables)'))
* 100, 2)||'%' "Percentage"
FROM DUAL
UNION
SELECT 'Short Table Scans ' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT
WHERE name = 'table scans (short tables)')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name IN
('table scans (short tables)', 'table scans (long tables)', 'table fetch by rowid'))
* 100, 2)||'%' "Percentage"
FROM DUAL
UNION
SELECT 'Long Table Scans ' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT
WHERE name = 'table scans (long tables)')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name
IN ('table scans (short tables)', 'table scans (long tables)', 'table fetch by rowid'))
* 100, 2)||'%' "Percentage"
FROM DUAL
UNION
SELECT 'Table by Index ' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT WHERE name = 'table fetch by rowid')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name
IN ('table scans (short tables)', 'table scans (long tables)'
, 'table fetch by rowid'))
* 100, 2)||'%' "Percentage"
FROM DUAL
UNION
SELECT 'Efficient Table Access ' "Ratio"
, ROUND(
(SELECT SUM(value) FROM V$SYSSTAT WHERE name
IN ('table scans (short tables)','table fetch by rowid'))
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name
IN ('table scans (short tables)', 'table scans (long tables)'
, 'table fetch by rowid'))
* 100, 2)||'%' "Percentage"
FROM DUAL;

#index使用比率

col name for a30
SELECT to_char(value,'999999999999999999999'), name FROM V$SYSSTAT WHERE name IN
('table fetch by rowid', 'table scans (short tables)'
, 'table scans (long tables)')
OR name LIKE 'index fast full%' OR name = 'index fetch by
key';

SELECT 'Index to Table Ratio ' "Ratio" , ROUND(
(SELECT SUM(value) FROM V$SYSSTAT
WHERE name LIKE 'index fast full%'
OR name = 'index fetch by key'
OR name = 'table fetch by rowid')
/ (SELECT SUM(value) FROM V$SYSSTAT WHERE name IN
('table scans (short tables)', 'table scans (long tables)')
),0)||':1' "Result"
FROM DUAL

#等待class
col wait_class for a30
SELECT wait_class, COUNT(wait_class) FROM v$system_event
GROUP BY wait_class ORDER BY 1;

##下面将查询到不含idle event的,其他重要event,但需要建立一个过滤函数
##CREATE OR REPLACE FUNCTION IdleEvent(pEvent IN VARCHAR2
##DEFAULT NULL)
##RETURN VARCHAR2 IS
##CURSOR cIdleEvents IS
##SELECT name FROM v$event_name
##WHERE wait_class = 'Idle'
##OR name LIKE '%null%' OR name LIKE '%timer%'
##OR name LIKE '%SQL*Net%' OR name LIKE '%rdbms ipc%'
##OR name LIKE '%ispatcher%' OR name LIKE '%virtual
##circuit%'
##OR name LIKE '%PX%' OR name LIKE '%pipe%'
##OR name LIKE '%message%' OR name LIKE 'jobq%'
##OR name LIKE 'Streams%';
##BEGIN
##FOR rIdleEvent in cIdleEvents LOOP
##IF pEvent = rIdleEvent.name THEN
##RETURN NULL;
##END IF;
##END LOOP;
##RETURN pEvent;
##EXCEPTION WHEN OTHERS THEN
##DBMS_OUTPUT.PUT_LINE(SQLERRM(SQLCODE));
##END;
##/
##ALTER FUNCTION IdleEvent COMPILE;
##/
##
##查询重要event
##COL event FORMAT a30;
##COL waits FORMAT 9999990;
##COL timeouts FORMAT 99999990;
##COL average FORMAT 99999990;
##SELECT event "Event", time_waited "Total Time", total_waits
##"Waits",average_wait "Average", total_timeouts "Timeouts"
##FROM v$system_event WHERE IdleEvent(event) IS NOT NULL
##ORDER BY event;
##
##每个等待event所占整体比例
##COL percentage FORMAT 9999999990;
##SELECT event "Event", total_waits "Waits", time_waited "Total
##Time"
##,TO_CHAR(
##(time_waited /
##(SELECT SUM(time_waited) FROM v$system_event
##WHERE IdleEvent(event) IS NOT NULL)
##)*100, 990.99) "Percentage"
##FROM v$system_event WHERE IdleEvent(event) IS NOT NULL ORDER
##BY event;

#检查系统中当前等待事件
col event for a30
select sid,event,p1,p2,p3,p1text,WAIT_TIME,SECONDS_IN_WAIT from v$session_wait where event not like 'SQL%' and event not like 'rdbms%';

#检查数据库中无效对象
SELECT owner, object_type,count(object_name) FROM dba_objects WHERE status= 'INVALID' group by owner,object_type;

#检查是否有禁用约束
SELECT owner, constraint_name, table_name, constraint_type, status
FROM dba_constraints
WHERE status ='DISABLE' and constraint_type='P'

#检查是否有禁用trigger
col owner for a10
col taigger_name for a10
cok table_name for a30
col table_name for a30
SELECT owner, trigger_name, table_name, status FROM dba_triggers WHERE status = 'DISABLED';

****************生成awr
cd $ORACLE_hOME/rdbms/admin

SQL> @awrrpt.sql

原文地址 http://guyuanli.itpub.net/post/37743/496574

来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/29578568/viewspace-2137975/，如需转载，请注明出处，否则将追究法律责任。

转载于:http://blog.itpub.net/29578568/viewspace-2137975/

标签：name,FORMAT,##,数据库,value,SELECT,oracle,健康检查,pool
来源： https://www.cnblogs.com/my-first-blog-lgz/p/14653155.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

ICode9

(转)oracle 数据库性能健康检查脚本