给大家推荐一个sql 调优工具---mytun

给大家推荐一个sql 调优工具
tool download： http://dbhelper.itpub.net/get/26969/mytun.zip
mytun区别于awr
oracle的awr只能看的plan变化，确没采集相关对象(表、列、index)的统计信息，及其变化，所以使plan变化的本质原因并不清晰。
mytun 可采集相关对象统计信息的变化，可发现plan变化的原因。mytun是对awr的一个补充，侧重对sql情况，执行原因的相关数据信息的收集，为远程的问题诊断提供帮助。
-----------------------mytun生成报表内容-----------------
sql % : 某sql在各类别的排名
sql total : 某sql耗用资源量。
sql per execs : 某sql一次执行的平均消耗
sql的原始文本
sql窥视绑定变量后的sql文本
sql在v$sqlarea的情况---sql的执行情况
sql在v$sqlarea_plan_hash(一个sql可能多种计划)---sql在不同计划下的执行情况
sql在dba_hist_sql_plan ----sql的历史计划(一般是 7-30天内的)
sql在wrh$_sqlstat -----在历史时间各时段的执行情况(频次, 计划hash, 效率等)
sql在v$sql_bind_capture ------带入的绑定变量
sql在dba_hist_sqlbind -------历史时段的绑定变量
sql 涉及的对象：
1. dba_tables --表的分析
2. dba_segments --段的大小,
3. 对象的产生，修改时间等
4. sql所涉及对象:
4.1 表的index 统计分析情况
4.2 表的index 的中包含的列
4.3 table的定义
4.4 table的当前统计值, 历史统计值
4.5 table的列的当前统计值，历史统计值
4.6 列的柱状图，历史柱状图。
mytun使用说明
http://dbhelper.itpub.net/
mytun2.0简介: 是一款sql调优工具, 它可快速采集(或远程)sql优化所需的信息, 定位产生错误执行计划的原因,
为远程问题诊断提供新的途径。采集信息包括: plan, 变量值, 分析信息(表/列/索引), 柱状图,
段信息(表/分区/索引),历史执行情况等。
适用范围 : 只适用于Oracle10g的各版本及平台。
目录
一. mytun.zip把上传至数据库服务器, 解压后会生成mytun目录和几个文件。
二. 安装软件包(第一次使用前需要安装, 以后使用就不需要了) 。
三. 使用mytun
附件1：运行mytunrpt.sql提示过程
附件2：运行mytunrpt.sql报告结果
四. 卸载mytun
一. mytun.zip把上传至数据库服务器, unzip解压后会生成mytun目录和几个文件。
$ unzip mytun.zip
Archive: mytun.zip
creating: mytun/
inflating: mytun/awrinpnm.sql
inflating: mytun/awrinput.sql
inflating: mytun/awrrpti.sql
inflating: mytun/checkmytun.sql
inflating: mytun/mytun.sql
inflating: mytun/mytunrpt.sql
inflating: mytun/p_mytun1.plb
inflating: mytun/p_mytun2.plb
inflating: mytun/running_sql.sql
二. 安装软件包(第一次使用时需要安装, 以后使用就不需要了)
方法1
$cd mytun
$sqlplus "/ as sysdba"
SQL> @p_mytun1.plb
Package created.
SQL> @p_mytun2.plb
Package body created.
方法2
sqlplus "/ as sysdba" @p_mytun1.plb
sqlplus "/ as sysdba" @p_mytun2.plb
三.使用mytun
使用mytun的方式有3种：
方式1：采集历史时段的数据库性能sql报告
sqlplus "/ as sysdba"
SQL> @mytunrpt.sql;
《下面的附件1显示在运行mytunrpt.sql提示过程》
注意：如果没有执行(二. 安装软件包 ), 运行mytunrpt.sql时会提醒安装。
note: please first install p_mytun1.plb in another session, method: sqlplus "sys/change_on_install as sysdba" @p_mytun1.plb
note: please second install p_mytun2.plb in another session, method: sqlplus "sys/change_on_install as sysdba" @p_mytun2.plb
方式2：采集正在运行的sql报告
sqlplus "/ as sysdba"
SQL> @running_sql.sql;
方式3：根据sql_id直接查询。会生成一个clob的报告。
3.1 在工具（PL/SQL Developer等工具）中, 查询会生成一个clob的报告。
select mytun.mysql( (select dbid from v$database),
(select instance_number from v$instance),
'056j4snsvphk5' , --sql_id
100)
from dual;
100: 每个查询子集返回的行数, 建议值100
3.2 在工具（sqlplus 环境中）中, 把结果输出到文件中。
sqlplus "/ as sysdba"
set long 999999999
set heading off
set pages 40000
set feedback off
set echo off
SET LONGCHUNKSIZE 500
set linesize 500
SET LOBOFFSET 1
spool /xxx/xxx/a.txt;
select mytun.mysql( (select dbid from v$database),
(select instance_number from v$instance),
'056j4snsvphk5' , --sql_id
100)
from dual;
spool off;
四. 卸载mytun
$ sqlplus "/ as sysdba"
SQL> drop package mytun;
Package dropped.
[ 本帖最后由 dbhelper 于 2010-8-10 10:51 编辑 ]

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1 DECLARE
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Message was edited by:
devmiral

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[Google for SQL*PLUS + condition|https://www.google.de/search?q=site%3Aforums.oracle.com+"SQL*PLUS"+condition]
# {message:id=4189517}
# {message:id=4105290}
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else a:=25;
end case;
update TBL_MITGLIEDER set TURNIERPUNKTE = TURNIERPUNKTE + a
where ID_MITGL = :P14_ID_MITGL;
end;
:PLATZ is user selected (1,2,3), :P14_ID_MITGL stores the reference to TBL_MITGLIEDER (and shows the change, when I select another record)
As I understand, that process should also run, when I submit a chance, but nothing happens then.
But when I try to save a new record (which worked without any problems before adding that process), I get this error message:
ORA-06550: line 1, column 64: PL/SQL: ORA-00957: duplicate column name ORA-06550: line 1, column 7: PL/SQL: SQL Statement ignored
Error Unable to process row of table TBL_TURNIERSIEGER.
Then, when I go back into the app-builder and try to run the page again, I get this message:
ORA-01403: no data found
Error Unable to fetch row.
I am not sure, if you guys have all the information you need, to know whats going on. Maybe this has to do with session-id and the whay, items are updated. I hope you can help me.
Thanks, best regards,
tobi

First can you please post all log file errors
>> I can't really give you a solution or specific recommendation since I did not saw this error yet myself, but on your own risk you can try:
1. You may try to just register 'dts.dll' using regsvr32.exe, but this error may indicate a bigger problem with setup.
If you are running SQL Server 64bit then try running this at the command prompt: %windir%\syswow64\regsvr32 "%ProgramFiles(x86)%\Microsoft SQL Server\90\dts\binn\dts.dll"
2. You can try reinstall from start (In this case you have to make sure that you un-install all)
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I am trying to have access tables of the Sql Server through the Oracle

I am trying to have access tables of the Sql Server through the Oracle and this being occurred the error:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message: [Generic Connectivity using ODBC][H006] The init parameter <HS_FDS_CONNECT_INFO> is not set.
Please set it in init <orasid>.ora file.
ORA-02063: preceding 2 lines from HSMSQL
I created the ODBC with name HSMSQL.
I made all the configurations in the archives
tnsnames.ora:
HSMSQL=
(DESCRIPTION=
(ADDRESS= (PROTOCOL = tcp)(HOST = wsus)(PORT = 1521))
(CONNECT_DATA =
(SID = HSMSQL)
(HS = OK)
listener.ora:
(SID_DESC = (SID_NAME=HSMSQL)
(ORACLE_HOME= C:\oracle\ora92)
(PROGRAM =hsodbc)
initHS_SID.ora:
HS_FDS_CONNECT_INFO = HSMSQL
HS_FDS_TRACE_LEVEL = OFF
-- Create database link
create database link HSMSQL.US.ORACLE.COM
connect to TESTE identified by TESTE2
using 'HSMSQL';
But when I execute query the error occurs:
Select * from TabTeste@HSMSQL
ORA-28500: connection from ORACLE to a non-Oracle system returned this message: [Generic Connectivity using ODBC][H006] The init parameter <HS_FDS_CONNECT_INFO> is not set.
Please set it in init <orasid>.ora file.
ORA-02063: preceding 2 lines from HSMSQL
Please they help me, thanks, Paulo.

Hi,
It seems that your configuration is Ok. By the way, the workaround for this error is:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Transparent gateway for ODBC][H001] The environment variable <HS_FDS_CONNECT_INFO> is not set.
* Set HS_FDS_CONNECT_INFO in the hs{sid}init.ora file to the data source name.
Example: HS_FDS_CONNECT_INFO = <ODBC DataSource Name>
* Make sure the hs{sid}init.ora file exists in the ORACLE_HOME/hs/admin directory and has the same name as the SID in the LISTENER.ORA.
Example: If SID=hsodbc in the listener.ora file, then the hs{sid}init.ora file would be named ORACLE_HOME/hs/admin/inithsodbc.ora
For more information see if this [url http://forums.oracle.com/forums/thread.jspa?forumID=61&threadID=576975]thread can help you.
Cheers

Report performance - PL/SQL vs SQL type

Hello,
Is it possible that report built as PL/SQL function returning SQL query is slower (much more) than common SQL report?
I’ve got a view, that I read data from. When I use SQL query report with variables in :PX_NAME format, it takes about 5 seconds to show the page. If I use PL/SQL report with variables in v('PX_NAME') format inside query string like:
'SELECT * FROM myview where myname like v(''P5_NAME'')';it takes about 3 minutes to get the same data.
Do you have any idea why?
Regards,
Przemek

It's hard to tell without knowing how many rows we are talking about, the CPU load, and so on, but in a heavily loaded system i can easily imagine that a query containing a call to V function might cause a not optimized access path, whereas the same query with a bind variable might work much better.
Said that, the rule of thumb is to use bind variables every time you can and avoid V as much as you can.
If you can do the same thing with :PX_NAME, use that, there is no justification for using V('PX_NAME').
Flavio
http://oraclequirks.blogspot.com

给大家推荐一个sql 调优工具---mytun

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