Re: new method to gather statistics in 11gr2
{quot}
thanks all
{quot}
Harsh_v wrote:
{quot}
thanks all
{quot}
And your question is since dbms_stats is not a new method AFAIK ?
Aman....
Similar Messages
-
Hello,
i am facing following problem with the automatic gather statistics job which is running every night.
The jobs starts when the weeknight/weekend_maintenance_windows opens, runs approx. 30 minutes and rebuilds statistics for around 270 objects. But when we check the status of objects next morning or immediate after jobrun, we still find hundrets of objects with stale statistics. We are not facing any heavy performance problems, but i want to know why we found stale statistics. The job uses 30 minutes of the 480 minutes window, so in my opinion there is plenty of time for all objects to create new statistics.
Is this normal behaviour?
Can't find anything in metalink.
Systeminfo:
Host: HP-UX 11.31
DB: 10.2.0.4
Regards
UlliUlli,
uwaldt wrote:
Hello Randolf,
we check if column stale_stats contains a 'YES'. The column 'last_analyzed' is filled with a date.OK, and the date corresponds to the latest run of the automatic statistics gathering job or is it outdated? What is the content of the corresponding TABMODIFICATIONS view in that case?
After we check sthe SQL-script with the 'original' check via dbms_stats.gather_schema_stats, we see that there is a difference between all_tab/ind_statistics and the real value in tabmodifications.Apologies, but I'm not able to follow: What is the "difference between all_tab/ind_statistics and the real value in *_tab_modifications"? You mean to say that the list of objects marked as "STALE_STATS = YES" column differs from the output of the "LIST STALE" call?
But what shows grid-control if we check there for stale stats?Good question, I can't answer since I seldom use the GUI tools.
The next is, the developers in house argue with the all_tab/ind_statistics and blame the DBA's to do their housekeeping, especially if the users complain bad performance. I knew that the gather_job do his work, but we can't show it probable to the developers.This all sounds a bit odd. Two comments:
1. It is possible in 10g to lock the statistics of tables, so that the automatic statistics collection job doesn't touch them. It's quite unlikely since you have to invoke it manually/explicitly using DBMS_STATS.LOCK_TABLE/SCHEMA_STATS, but may be you want to check the column STATTYPE_LOCKED in the TABSTATISTICS views for those objects in question, just to make sure.
2. All the monitoring related information (*TABMODIFICATIONS/STALE_STATS column etc.) is usually only updated every three hours or if a call to DBMS_STATS.GATHER_STATS is performed. If you want to manually invoke the flush of the monitoring info, you can call DBMSSTATS.FLUSH_DATABASE_MONITORING_INFO to make sure that you look at the latest monitoring information available.
Above point might explain that you can spot differences/inconsistencies before/after calling DBMS_STATS.GATHER_SCHEMA_STATS to list the stale objects.
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/ -
Gather statistics about classloader
I can gather statistics like
1.No of classes loaded.
2.Memory used by the JVM.
3.Threads created about the JVM (default ClassLoader of the JVM).
I need to do the same for any generic ClassLoader.
The code I use to gather information for the JVM's ClassLoader is as follows:
import java.io.IOException;
import java.lang.management.ClassLoadingMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.net.MalformedURLException;
import javax.management.MBeanServer;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;
public class ClassLoading {
public static void main(String args[]) throws MalformedURLException, IOException
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
JMXServiceURL url = new JMXServiceURL("rmi", null, 0);
JMXConnectorServer cs = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbs);
cs.start();
JMXServiceURL url1 = cs.getAddress();
JMXConnector jmxc = JMXConnectorFactory.connect(url1, null);
MBeanServerConnection mbsc = jmxc.getMBeanServerConnection();
final ClassLoadingMXBean clmb = ManagementFactory.newPlatformMXBeanProxy(mbsc, ManagementFactory.CLASS_LOADING_MXBEAN_NAME, ClassLoadingMXBean.class);
System.out.println("Loaded class count"+clmb.getLoadedClassCount());
final OperatingSystemMXBean osmxb = ManagementFactory.newPlatformMXBeanProxy(mbsc, ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME, OperatingSystemMXBean.class);
System.out.println("Name"+osmxb.getName());
}Hi Nicolas. You're right that we recommend using DBMS_STATS for most statistics-gathering purposes. I'll pass this along to the writer who manages the Database Reference, to see that it gets updated. I'll also ask him to check the clarity of the column descriptions.
Regards,
Diana -
Error while adding a new method to the Session Bean
Hello everyone. I'm using jdev 11g, ejb, jpa & jsf. Everything works fine. But when I try to add a custom method to the Session Bean, I'm having an error.
Here is my steps:
1) I added a new method to SessionBean.java. Something like this:
public void Hello() {
System.out.println("Hello!");
2) Then using Structure palette I exposed this method through Local interface and created data control
3) Finally, I made a command button binded to this method (just droped it from DataControls.dcx to my page)
When I start the page and click the button, I'm having the following error:
Error 500--Internal Server Error
javax.faces.el.EvaluationException: Method not found: Hello.execute(javax.faces.event.ActionEvent)
at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:58)
at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodBinding(UIXComponentBase.java:1227)
at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:183)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:70)
... (I've truncated the log because there is nothing important in the missing part)Yes, I have binding in the page def. Everything is correct there:
<methodAction id="Hello" RequiresUpdateModel="true" Action="invokeMethod"
MethodName="Hello" IsViewObjectMethod="false"
DataControl="PriceServiceLocal"
InstanceName="PriceServiceLocal.dataProvider"/>
I've droped the method from the Data Controls panel -
Creating a new method in an enhanced component class implemetation
Hello Experts,
I am trying to create a new method in the enhanced component(BT115IT_SLSO) implementation class ( ZL_BT115IT__ITEMS_IMPL)to run our custom functionality. But somehow when I put a breakpoint and debug while I add a product to the sales order the method doesnt get trigerred.
Is there some thing which I have to do get this trigerred ? I just added a ned method and placed some custom code in it. Do I have to invoke it anywhere ?
Pls help me out. I am new to Web UI.
ThanksHi Mavrick,
As you are performing some action like item addition , there you need a method called as " event handler " to handle the event and perform the required actions.
Place a break point in DO_HANDLE_EVENT method , and you will know the exact event handler method which is getting triggered . or if you are defining a new event ( by adding any new button) you should create a event handler method using wizard giving the same name which is defined on_click field of the button as it is case sensitive.
Regards,
Nithish -
Why can I no longer, after having downloaded Lion, write accents and other diacriticals when in the Google, Yahoo, FaceBook, or even here in this post? The new method for getting at the "option" symbols works fine in other places like spotlight, but now even the older "option+letter" doesn't work in most places.
Chrome doesn't support the new accent/diacritics/macron chooser. I'm not sure about other browsers such as Firefox. You can use the old Option+letter combination that Doug suggested. Hopefully updates will solve these little incompatibilities shortly.
Neill -
Hi folks!
I gathered statistcs in one schema with folowing options:
exec dbms_stats.gather_schema_stats(user,method_opt=>'FOR ALL COLUMNS SIZE 1',estimate_percent=>null,gather_temp=>false,cascade=>true,degree=>dbms_stats.auto_degree);Then:
exec dbms_stats.gather_schema_stats(user,method_opt=>'FOR ALL COLUMNS SIZE SKEWONLY',estimate_percent=>null,gather_temp=>false,cascade=>true,degree=>dbms_stats.auto_degree);Now, I turn on table monitoring and suggest to gather statistics (per day) with that parameters:
dbms_stats.gather_schema_stats(ownname =>user, options=>'GATHER STALE', gather_temp => false, cascade => true, estimate_percent => 100, degree => dbms_stats.auto_degree);Default method_opt is FOR ALL COLUMNS SIZE AUTO.
Now I got better perfomance. How often I need to gather statstics?
Thanks in advance.
Best regards, Pavel.Thanks, I also think so.
Little test-case:
SQL>exec dbms_stats.gather_table_stats(user,'TABLE1',estimate_percent=>null);
Elapsed: 00:00:01.03
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE1;
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
DISGRP 7944 33204
DISMBR 18948 33204
TYPE 4 33204
Elapsed: 00:00:00.03
SQL> exec dbms_stats.gather_table_stats(user,'TABLE1',estimate_percent=>10);
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.78
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE1';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
DISGRP 3836 3269
DISMBR 13686 3269
TYPE 4 3269
Elapsed: 00:00:00.00
SQL> exec dbms_stats.gather_table_stats(user,'TABLE1',estimate_percent=>100);
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.52
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE1';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
DISGRP 7944 33204
DISMBR 18948 33204
TYPE 4 33204
Elapsed: 00:00:00.01
SQL> exec dbms_stats.gather_table_stats(user,'TABLE1',estimate_percent=>dbms_stats.auto_sample_size);
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.53
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE1';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
DISGRP 8448 5568
DISMBR 18948 33204
TYPE 4 5568
Elapsed: 00:00:00.00
SQL> select count(distinct disgrp) from TABLE1;
COUNT(DISTINCTDISGRP)
7944
Elapsed: 00:00:00.02
SQL> select count(distinct dismbr) from TABLE1;
COUNT(DISTINCTDISMBR)
18948
Elapsed: 00:00:00.03
SQL> select count(distinct type) from TABLE1;
COUNT(DISTINCTTYPE)
4
Elapsed: 00:00:00.01
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE2';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
ID 219120 219120
UNIT 114762 219120
LOC 61 219120
TIS 1230 219120
RTYP 3 219120
Elapsed: 00:00:00.02
SQL> exec dbms_stats.gather_table_stats(user,'TABLE2',estimate_percent=>null);
PL/SQL procedure successfully completed.
Elapsed: 00:00:07.61
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE2';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
ID 219120 219120
UNIT 114762 219120
LOC 61 219120
TIS 1230 219120
RTYP 3 219120
Elapsed: 00:00:00.00
SQL> exec dbms_stats.gather_table_stats(user,'TABLE2',estimate_percent=>10);
PL/SQL procedure successfully completed.
Elapsed: 00:00:02.90
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE2';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
ID 219950 21995
UNIT 70812 21995
LOC 43 21995
TIS 496 21995
RTYP 3 21995
Elapsed: 00:00:00.00
SQL> exec dbms_stats.gather_table_stats(user,'TABLE2',estimate_percent=>50);
PL/SQL procedure successfully completed.
Elapsed: 00:00:03.70
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE2';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
ID 218716 109358
UNIT 92338 109426
LOC 61 109455
TIS 994 109567
RTYP 3 109422
Elapsed: 00:00:00.00
SQL> exec dbms_stats.gather_table_stats(user,'COMPS',estimate_percent=>100);
PL/SQL procedure successfully completed.
Elapsed: 00:00:04.37
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE2';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
ID 219120 219120
UNIT 114762 219120
LOC 61 219120
TIS 1230 219120
RTYP 3 219120
Elapsed: 00:00:00.00
SQL> exec dbms_stats.gather_table_stats(user,'COMPS',estimate_percent=>dbms_stats.auto_sample_size);
PL/SQL procedure successfully completed.
Elapsed: 00:00:03.81
SQL> select column_name,num_distinct,sample_size from user_tab_col_statistics where table_name='TABLE2';
COLUMN_NAME NUM_DISTINCT SAMPLE_SIZE
ID 217968 54492
UNIT 122237 54492
LOC 31 5495
TIS 240 5495
RTYP 3 5495
Elapsed: 00:00:00.01
SQL> select count(distinct id) from TABLE2;
COUNT(DISTINCTID)
219120
Elapsed: 00:00:00.27
SQL> select count(distinct unit) from TABLE2;
COUNT(DISTINCTUNIT)
114762
Elapsed: 00:00:00.30
SQL> select count(distinct loc) from TABLE2;
COUNT(DISTINCTLOC)
61
Elapsed: 00:00:00.06
SQL> select count(distinct tis) from TABLE2;
COUNT(DISTINCTTIS)
1230
Elapsed: 00:00:00.09In that situation, auto_sample_size not bad? But estimate_percent=>100 - exact.
Best regards, Pavel. -
Hi,
I am creating a new method METHOD2 in an existing class.
I am using an internal table which is populated in other method METHOD1.
But when I tried to call the METHOD2 in main program,it is saying that METHOD2 is not defined.while I have activated the method.
it is to be noted that I have not given any exporting,importing,changing parameter to this method.Do I need to give it compulsarily>if yes,then can I give the internal table as changing parameter,the one which is being populated in METHOD1.?
Thanks in advance!!Hi ,
Here is a sample code that accesses an internal table in a method to display the list of employees
Super class LCL_CompanyEmployees
CLASS lcl_company_employees DEFINITION.
PUBLIC SECTION.
TYPES:
BEGIN OF t_employee,
no TYPE i,
name TYPE string,
wage TYPE i,
END OF t_employee.
METHODS:
constructor,
add_employee
IMPORTING im_no TYPE i
im_name TYPE string
im_wage TYPE i,
display_employee_list,
display_no_of_employees.
PRIVATE SECTION.
CLASS-DATA: i_employee_list TYPE TABLE OF t_employee,
no_of_employees TYPE i.
ENDCLASS.
*-- CLASS LCL_CompanyEmployees IMPLEMENTATION
CLASS lcl_company_employees IMPLEMENTATION.
METHOD constructor.
no_of_employees = no_of_employees + 1.
ENDMETHOD.
METHOD add_employee.
Adds a new employee to the list of employees
DATA: l_employee TYPE t_employee.
l_employee-no = im_no.
l_employee-name = im_name.
l_employee-wage = im_wage.
APPEND l_employee TO i_employee_list.
ENDMETHOD.
METHOD display_employee_list.
Displays all employees and there wage
DATA: l_employee TYPE t_employee.
WRITE: / 'List of Employees'.
LOOP AT i_employee_list INTO l_employee.
WRITE: / l_employee-no, l_employee-name, l_employee-wage.
ENDLOOP.
ENDMETHOD.
METHOD display_no_of_employees.
Displays total number of employees
SKIP 3.
WRITE: / 'Total number of employees:', no_of_employees.
ENDMETHOD.
ENDCLASS.
Sub class LCL_BlueCollar_Employee
CLASS lcl_bluecollar_employee DEFINITION
INHERITING FROM lcl_company_employees.
PUBLIC SECTION.
METHODS:
constructor
IMPORTING im_no TYPE i
im_name TYPE string
im_hours TYPE i
im_hourly_payment TYPE i,
add_employee REDEFINITION.
PRIVATE SECTION.
DATA:no TYPE i,
name TYPE string,
hours TYPE i,
hourly_payment TYPE i.
ENDCLASS.
*---- CLASS LCL_BlueCollar_Employee IMPLEMENTATION
CLASS lcl_bluecollar_employee IMPLEMENTATION.
METHOD constructor.
The superclass constructor method must be called from the subclass
constructor method
CALL METHOD super->constructor.
no = im_no.
name = im_name.
hours = im_hours.
hourly_payment = im_hourly_payment.
ENDMETHOD.
METHOD add_employee.
Calculate wage an call the superclass method add_employee to add
the employee to the employee list
DATA: l_wage TYPE i.
l_wage = hours * hourly_payment.
CALL METHOD super->add_employee
EXPORTING im_no = no
im_name = name
im_wage = l_wage.
ENDMETHOD.
ENDCLASS.
Sub class LCL_WhiteCollar_Employee
CLASS lcl_whitecollar_employee DEFINITION
INHERITING FROM lcl_company_employees.
PUBLIC SECTION.
METHODS:
constructor
IMPORTING im_no TYPE i
im_name TYPE string
im_monthly_salary TYPE i
im_monthly_deducations TYPE i,
add_employee REDEFINITION.
PRIVATE SECTION.
DATA:
no TYPE i,
name TYPE string,
monthly_salary TYPE i,
monthly_deducations TYPE i.
ENDCLASS.
*---- CLASS LCL_WhiteCollar_Employee IMPLEMENTATION
CLASS lcl_whitecollar_employee IMPLEMENTATION.
METHOD constructor.
The superclass constructor method must be called from the subclass
constructor method
CALL METHOD super->constructor.
no = im_no.
name = im_name.
monthly_salary = im_monthly_salary.
monthly_deducations = im_monthly_deducations.
ENDMETHOD.
METHOD add_employee.
Calculate wage an call the superclass method add_employee to add
the employee to the employee list
DATA: l_wage TYPE i.
l_wage = monthly_salary - monthly_deducations.
CALL METHOD super->add_employee
EXPORTING im_no = no
im_name = name
im_wage = l_wage.
ENDMETHOD.
ENDCLASS.
R E P O R T
DATA:
Object references
o_bluecollar_employee1 TYPE REF TO lcl_bluecollar_employee,
o_whitecollar_employee1 TYPE REF TO lcl_whitecollar_employee.
START-OF-SELECTION.
Create bluecollar employee obeject
CREATE OBJECT o_bluecollar_employee1
EXPORTING im_no = 1
im_name = 'Gylle Karen'
im_hours = 38
im_hourly_payment = 75.
Add bluecollar employee to employee list
CALL METHOD o_bluecollar_employee1->add_employee
EXPORTING im_no = 1
im_name = 'Gylle Karen'
im_wage = 0.
Create whitecollar employee obeject
CREATE OBJECT o_whitecollar_employee1
EXPORTING im_no = 2
im_name = 'John Dickens'
im_monthly_salary = 10000
im_monthly_deducations = 2500.
Add bluecollar employee to employee list
CALL METHOD o_whitecollar_employee1->add_employee
EXPORTING im_no = 1
im_name = 'Karen Johnson'
im_wage = 0.
Display employee list and number of employees. Note that the result
will be the same when called from o_whitecollar_employee1 or
o_bluecolarcollar_employee1, because the methods are defined
as static (CLASS-METHODS)
CALL METHOD o_whitecollar_employee1->display_employee_list.
CALL METHOD o_whitecollar_employee1->display_no_of_employees. -
How to Gather Statistics of Tables and Indexes
Hi all,
Plz help me in Gathering Statistics of Tables and Indexes.
Thanksfor tables
exec dbms_stats.gather_table_stats('SCOTT', 'EMPLOYEES');
for indexes
exec dbms_stats.gather_index_stats('SCOTT', 'EMPLOYEES_PK');
check this link for detail
http://nimishgarg.blogspot.com/2010/04/oracle-dbmsstats-gather-statistics-of.html -
To change the string in Class Builder "New Method"
HI friends,
Im using the std program of "RFDOPR10"...(changed into my customised program as ZRFDOPR10).....
Here i want to change the strings of Id_type eq 4 availble under the class builder "New Method".
"id_ruler_string = '2.13.24.29|43|58|73|88|103|118|'" (for 24...i want to give 38.....then 45...)
Pls help me how to change the std method function for my z program...
FYR:
RFDOPR10 is the std program for tcode :"s_alr_87012178", Customer analysis.If u want to c the example report, in this tcode...give OI:1, Summ level:6, OI list:1 and Company CD:2 under Output control tab in selection screen with Company code.Now, u able to see the reports in the screen.There, after Customer number....I've to give some more spaces(length) for Sort field.
Thanks & regards
Sankar.No, but I suggest using a different editor which does allow a different text option and just pasting it in.
-
Tochange the string in Std Class Builder "New Method"
HI freinds,
Im using the std program of "RFDOPR10"...(changed into my customised program as ZRFDOPR10).....
Here i want to change the strings of Id_type eq 4 availble under the class builder "New Method".
"id_ruler_string = '2.13.24.29|43|58|73|88|103|118|'" (for 24...i want to give 38.....then 45...)
Pls help me how to change the std method function for my z program...
FYR:
RFDOPR10 is the std program for tcode :"s_alr_87012178", Customer analysis.If u want to c the example report, in this tcode...give OI:1, Summ level:6, OI list:1 and Company CD:2 under Output control tab in selection screen with Company code.Now, u able to see the reports in the screen.There, after Customer number....I've to give some more spaces(length) for Sort field.
Thanks & regards
Sankar.Associated with the text box there will be some kind of event handler. Maybe it's an action event on the text box (when the user clicks return) or maybe you have a separate button that the user clicks.
Either way, in the event handler, get the text from the text box, and then call the sendData method, passing the text as an argument. -
Using new methods (getContentHandler and parse(InputSource)
I am trying to read an xml file then count how many books from the xml file. I learned some methods are deprecated, so I tried to use the new methods. But, I somehow can't get the program work. I am stack on the getContentHandler and parse(InputSource) line ... :( Help!!!
I changed: setDocumentHandler to getContentHandler
HandlerBase to DefaultHandler
parse to parse(InputSource)
Kindly take a look at my program see if I missed out something? Thank you very much for your time.
My code:
=============
* Write a description of class hello here.
* @author (your name)
* @version (a version number or a date)
import java.io.*;
import java.net.*;
import java.lang.*;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
public class BookCounter extends DefaultHandler
private int count = 0;
public static void main (String args[]) throws Exception
(new BookCounter()).countBooks();
public void countBooks() throws Exception
SAXParserFactory f = SAXParserFactory.newInstance();
SAXParser f2 = f.newSAXParser();
// Here said "cannot resolve symbol - method getContentHandler (BookCounter)
f2.getContentHandler(this);
// Here said "cannot resolve symbol - method parse(java.lang.String)
f2.parse("file:///C:/books.xml");
public void startElement(String name, Attributes atts) throws SAXException
if (name.equals("book"))
count++;
public void endDocument() throws SAXException
System.out.println("There are" + count + "books");// Here said "cannot resolve symbol - method getContentHandler (BookCounter)
f2.getContentHandler(this);
should be
f2.setContentHandler(this); -
Exclude Schema from Gather Statistics Job
I am using 11.1.0,7. I would like to know if we can exclude some schemas While Oracle automatically gathers the statistics.
Reason I want this is that, I have one database that supports multiple applications but as per one application's demand we should not be gathering stats on it's schema. So, in totality I have 20 Schemas but while this jobs run, I want to exclude 2 schemas that this application supports.
Locking the Stats for these schemas is not an option.
Thanks!Have you enquired from the vendor exactly why they do not want you to gather statistics on it's schema?
Is there other options they are willing to consider like baselining the explain plan or perhaps not publishing the statistics to the tables...using the pending statistics feature?
Exec dbms_stats.set_table_prefs('SH', 'CUSTOMERS', 'PUBLISH', 'false');
Regards
Tim Boles
Edited by: Tim Boles on Aug 4, 2010 11:11 AM -
Hi,
I launched a job to gather statistics on just one schema on my DATABASE in OEM. How can I identify it's session ? Many thanks before.You can try below query:
select s.username, s.sid,s.serial#, sql.sql_Text
from v$session s, v$sqlarea sql
where s.sql_address = sql.address and s.sql_hash_value = sql.hash_value and
s.username = '&username' and lower(sql.sql_text) like '%dbms_stats%'
Best Regards
Krystian Zieja / mob -
exec dbms_stats.gather_schema_stats( -
ownname => 'PROD1, -
options => 'GATHER AUTO', -
estimate_percent => dbms_stats.auto_sample_size, -
method_opt => 'for all columns size repeat', -
degree => 25 -
I have 400 tables in PROD1 schema, but I want to gather statistics for 120 tables only
How to gathere statistics for 120 tables ?
For specifying degree, what is the minimum and maximum? Will this affect any performanceuser8934564 wrote:
exec dbms_stats.gather_schema_stats( -
ownname => 'PROD1, -
options => 'GATHER AUTO', -
estimate_percent => dbms_stats.auto_sample_size, -
method_opt => 'for all columns size repeat', -
degree => 25 -
I have 400 tables in PROD1 schema, but I want to gather statistics for 120 tables only
How to gathere statistics for 120 tables ?
For specifying degree, what is the minimum and maximum? Will this affect any performanceFrom Oracle Docs:
Degree is Degree of parallelism. The default for degree is NULL. The default value can be changed using the SET_PARAM Procedure. NULL means use the table default value specified by the DEGREE clause in the CREATE TABLE or ALTER TABLE statement. Use the constant DBMS_STATS.DEFAULT_DEGREE to specify the default value based on the initialization parameters. The AUTO_DEGREE value determines the degree of parallelism automatically. This is either 1 (serial execution) or DEFAULT_DEGREE (the system default value based on number of CPUs and initialization parameters) according to size of the object.To be able to gather stats for 120 tables:
1) You can create a temporary table, enter the names of these tables, create a PL/SQL procedure, loop for the table names and call GATHER_TABLE_STATS for each table.
2) You can lock other table's stats, and call GATHER_SCHEMA_STATS.
Regards
Gokhan
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