Statistics collection

Guys,
I have a table called ENTITY_VOLUME, which has about 8 partitions. Periodically the business deletes each range of program_id's and hence i drop such partitions and split the last partition to make room for new partitions.
Now, i have an issue :
The business users run something called as a "Program Copy", which basically takes old program_id's and updates some of the fields and inserts the values into a new partition with new program_id. I've noticed that if the new partition doesn't have any statistics at the time of this insertion, the program_copy program hangs forever..
I was wondering if there is a way to create dummy statistics into these partitions.
It's like
1,2,3,4==> PRT007
You run program_copy
When it inserts rows into the new partition (Say PRT008) and tries to query them, the query hangs forever.
Any ideas would be appreciated.
Is there anyway, we can copy statistics from one partition to the other ?

You can use the DBMS_STATS.SET_TABLE_STATS to set some base-line statistics for the table and/or for the partition. You can use the EXPORT_TABLE_STATS and IMPORT_TABLE_STATS procedures to copy statistics from one partition to another.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Similar Messages

  • How stop the automatic statistics collection job after the maintenance wind

    Hi,
    we are for a solution to stop the automatic statistics collection job after the maintenance window finished.
    we disable all jobs except the automatic statistics collection, because this is the only one we want to run. Then we define specific values for the interval and duration parameters of the maintenance window to customize this task.
    But for their systems it is very important that this job/task will immediately stop when the window is closed!!!
    So, how could we ensure this behavior.
    For Oracle 10g it is easy because the statistic job always exists and it is possible to set its duration and create an addtional event based job which kills all jobs that are running over duration.
    In Oracle 11g the statistic job is created by the system during the maintenance window is open.
    We are not able to modify parameters of this system job. After the maintenance window closed the job is already running - only with another resource priority - but it is running.
    Please help me in this scenario
    Thanks&Regards
    Prem

    ?So basically you are saying is if none of the tables are changed then GATHER_STATS_JOB will not run, but i see tables are updated still the job is not running. I did >query dba_scheduler_jobs and the state of the job is true and scheduled. Please see my previous post on the output
    Am i missing anything here, do i look for some parameters settings
    So basically you are saying is if none of the tables are changed then GATHER_STATS_JOB will not run,GATHER_STATS_JOB will run and if there are any table in which there's a 10 percent change in data, it will gather statistics on that table. If no table data have changes less than 10 percent, it will not gather statistics.
    http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41282
    Hope this helps.
    -Anantha

  • How to disable automatic statistics collections on tables

    Hi
    I am using Oracle 10g and we have few tables which are frequently truncated and news rows added to it. Oracle automatically analyzes the table by some means which collects statistics of the table but at the wrong time(when the table is empty). This makes my query to do a full table scan rather using indexes since the statistics was collected when the table was empty.Could any one please let me know how to disable the automatic statistics collection feature of Oracle?
    Cheers
    Anantha PV

    Hi
    I am using Oracle 10g and we have few tables which
    are frequently truncated and news rows added to it.
    Oracle automatically analyzes the table by some means
    which collects statistics of the table but at the
    wrong time(when the table is empty). This makes my
    query to do a full table scan rather using indexes
    since the statistics was collected when the table was
    empty.Could any one please let me know how to disable
    the automatic statistics collection feature of
    Oracle?
    First of all I think it's important that you understand why Oracle collects statistics on these tables: Because it considers the statistics of the object to be missing or stale. So if you just disable the statistics gathering on these tables then you won't have statistics at all or outdated statistics.
    So as said by the previous posts you should gather the statistics manually yourself anyway. If you do so right after loading the data into the truncated table, you don't need to disable the automatic statistics gathering as it only processes objects that are stale or don't have statistics at all.
    If you still think that you need to disable it there are several ways to accomplish it:
    As already mentioned, for particular objects you can lock the statistics using DBMS_STATS.LOCK_TABLE_STATS, or for a complete schema using DBMS_STATS.LOCK_SCHEMA_STATS. Then these statistics won't be touched by the automatic gathering job. You still can gather statistics using the FORCE=>true option of the GATHER__STATS procedures.
    If you want to change the automatic gathering job that it only gathers statistics on objects owned by Oracle (data dictionary, AWR etc.), then you can do so by calling DBMS_STATS.SET_PARAM('AUTOSTATS_TARGET', 'ORACLE'). This is the recommended method.
    If you disable the schedule job as mentioned in the documentation by calling DBMS_SCHEDULER.DISABLE('GATHER_STATS_JOB') then no statistics at all will be gathered automatically, causing your data dictionary statistics to be become stale over time, which could lead to suboptimal performance of queries on the data dictionary.
    All this applies to Oracle 10.2, some of the features mentioned might not be available in Oracle 10.1 (as you haven't mentioned your version of 10g).
    Regards,
    Randolf
    Oracle related stuff blog:
    http://oracle-randolf.blogspot.com/
    SQLTools++ for Oracle:
    http://www.sqltools-plusplus.org:7676/
    http://sourceforge.net/projects/sqlt-pp/

  • (10g) 자동 통계정보 수집(AUTOMATIC OPTIMIZER STATISTICS COLLECTION)

    제품 : ORACLE SERVER
    작성날짜 : 2006-07-21
    PURPOSE
    이 문서는 10g의 new feature인 자동 통계정보 수집(Automatic Optimizer
    Statistics Collection)에 대한 소개와 기능에 대한 자료이다.
    Explanation
    1. 개요
    Optimizer statistics는 GATHER_STATS_JOB에 의해서 자동으로
    수집된다. 이 JOB은 SYS 소유로서 OBJECT_TYPE이 JOB이다.
    이 JOB은 통계정보가 없거나 stale 상태의 통계정보를 갖는 DB 내의
    모든 OBJECT들에 대한 통계정보들을 수집한다.
    2. 자동 통계정보 수집을 위한 설정과 방식
    1) STATISTICS_LEVEL = TYPICAL | ALL
    2) 통계정보들은 predefined GATHER_STATS_JOB에 의해 수집된다.
    3) JOB이 수행될 때 JOB은 다음과 같은 사항들을 결정한다.
    - missing 또는 stale 상태의 통계정보를 갖는 object를 결정한다.
    - 좋은 통계정보를 생성하기 위해 필요한 적당한 sampling percentage.
    - histogram과 histogram의 사이즈를 요구하는 적절한 column.
    - 통계정보 수집에 대한 parallelism의 degree.
    - 어느 object에 대한 통계정보를 수집할지에 대한 우선순위
    3. GATHER_STATS_JOB에 대한 설명
    이 job은 데이타베이스 생성 시점에 생성되고 스케줄러에 의해 관리된다.
    GATHER_STATS_JOB 은 DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROC procedure를
    call함으로써 통계정보를 수집한다.
    이 프로시져는 'GATHER AUTO' 옵션을 사용한 DBMS_STATS.GATHER_DATABASE_STATS
    procedure와 아주 유사한 형태로 동작한다. 이것과 다른 점은
    GATHER_DATABASE_STATS_JOB_PROC procedure는 통계정보를 수집해야 할
    Object에 대해 우선순위를 두고 순서대로 처리한다. 즉, 가장 많이
    통계정보가 update가 되어야 할 object를 가장 먼저 처리하는 것이다.
    이것은 maintenance window가 close되기 전에 가장 필요한 통계정보가
    먼저 수집되도록 하기 위함이다.
    4. Dictionary Objects에 대한 통계정보
    1) Oracle Database 10g부터 최적의 performance 결과를 얻기 위해 dictionary
    table들에 대한 통계정보도 수집할 수 있다.
    언제라도, DBMS_STATS.GATHER_SCHEMA_STATS procedure를 사용하여
    dictionary table들에 대한 통계정보를 수집하는 것이 가능하다.
    이 때 GATHER_SYS argument는 TRUE로 셋팅되어 있어야 한다.
    2) DBMS_STATS.GATHER_DICTIONARY_STATS라 하는 새로운 procedure도 사용
    하는 것이 가능하다. 이것을 사용하기 위해서는 ANALYZE ANY DICTIONARY
    라는 새로운 system privilege가 있어야 한다.
    이 권한은 만약 어떤 user가 SYSDBA 권한이 없는 경우 dictionary object와
    fixed object들을 analyze할 수 있도록 한다.
    3) GATHER_DATABASE_STATS라는 프로시져는 GATHER_FIXED라 불리우는 새로운
    argument를 가진다. 이 값은 default로 FALSE로 셋팅된다. 즉, 기본적으로
    fixed table들에 대해서는 통계정보를 생성하지 않도록 한다.
    전형적인 System WorkLoad가 있는 동안에는 fixed table들에 대하여
    한번만 analyze하면 충분하다.
    4) GATHER_FIXED_OBJECTS_STATS라는 procedure를 사용하여 fixed table들에
    대한 통계정보를 모으는 것도 가능하다. 또한 모든 fixed table들에 대하여
    통계정보를 delete하는 것도 가능하고, fixed table에 통계정보를
    export 또는 import하는 것도 가능하다.
    Example
    none
    Reference Documents
    <Note:266040.1>

    Hi,
    Please see here,
    http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41448
    If the table/s are changing very frequently than its better to gather the stats manually.This would lead teh volatile table coming up into the stats job again and again.
    For the system stats and data dictionary stats,they are not collected by default.So there is no choice but to gather them manually.
    Aman....

  • Optimizer Statistics collection after upgrade from 8i to 10R2

    I just upgraded database from 8.1.7 to 10R2 .
    What would the best approach for Optimizer Statistics collection. We would like to open database for test , but I afraid some quries going to run slow without latest stats. Should I run it manually or let Oracle run it’s default stats collection job later on.
    Any suggestions?

    user594143
    You really need a strategy before an upgrade like this, but you have two options -
    a) try to make the 10g stats collection identical to the 8i stats collection. Check the code you used to run, check the 8i default values for the parameters in your current dbms_stats() calls, and write them in explicitly when you run the code under 10g.
    OR
    b) do a full 10g conversion. Get rid of your own collection code, clear out most of the old settings you had in your parameter file for fiddling with the optimizer, do a 'gather_schema_stats' then leave 10g to do its default thing and fix any problems that appear.
    If you have testing time on a non-production system, then (b) is the strategic option - although personally I think it tends to collect too many histograms and still needs some refinement; if you don't have any testing time and you're going straight into production then (a) is the least threatening option (and if someone's made you do that, you might also set the optimizer_features_enable to 8.1.7 until you can do some proper upgrade tests).
    Regards
    Jonathan Lewis
    http://jonathanlewis.wordpress.com
    http://www.jlcomp.demon.co.uk

  • CDMC - Activate Statistics Collection

    Hi,
    I have a question related to CDMC Statistics Collection.It is not clear for me, after activate the collection what are the periods to evaluate and period type?
    Please can you clarify?
    Best Regards,
    Zsuzsanna

    Hi Zsuzsanna,
    As shown in the screenshot in my first reply it will take input as per the given period and perid type and will fetch usage statistics data for the given time period but to shcedule the same for every three months you need to give inout in the next pop-up screen here you can give input to schedule three different jobs for future as per your requirement, According to the period and period type given these jobs will be scheduled and run in the statistics/production system and will update usage information in the CDMC table in the statistics system.
    According to the given input it will schedule jobs and run in the statistics/produdction system , if you give 1 day then job will run daily and will update and store usage statistics data in the CDMC database table in the statistics system itself and not in Solution manager system.
    This data will only get imported in the solman when you create and execute new Clearing analysis project and execute activities in the same.
    If you are expecting the latest usage results then yes,you need to create new CDMC Clearing Analysis project every time as this usage information will not get updated automatically in the CDMC project.
    Please let me know if you have any doubts.
    Best Regards,
    Pritish

  • Automatic Optimizer Statistics Collection Enabled still tables not analyzed

    Hello,
    We have Oracle 11g R1 database. Our automatic Optimizer Statistics Collection settings are enabled, still I don't see the tables being analyzed, any suggestions if I am missing any settings. All tables do get analyzed if I do manual statistics gathering.
    SQL> select CLIENT_NAME ,STATUS from DBA_AUTOTASK_CLIENT;
    CLIENT_NAME STATUS
    auto optimizer stats collection ENABLED
    auto space advisor ENABLED
    sql tuning advisor ENABLED
    Thanks,
    SK

    user599845 wrote:
    Hello,
    We have Oracle 11g R1 database. Our automatic Optimizer Statistics Collection settings are enabled, still I don't see the tables being analyzed, any suggestions if I am missing any settings. All tables do get analyzed if I do manual statistics gathering.
    SQL> select CLIENT_NAME ,STATUS from DBA_AUTOTASK_CLIENT;
    CLIENT_NAME STATUS
    auto optimizer stats collection ENABLED
    auto space advisor ENABLED
    sql tuning advisor ENABLED
    Thanks,
    SK
    still I don't see the tables being analyzed, post SQL & results that lead you to this conclusion.
    realize that statistics can be "collected" without updating LAST_ANALYZED column.
    if data within table does not change, the nothing would be gained by "updating" statistics to same values as now/before.

  • Why does the snmpcoll process always start up even if SNMP Statistics Collection is turned off?

    Why does the snmpcoll process always start up even if SNMP
    Statistics Collection is turned off?
    <P>
    The SNMP Statistics Collection field on the Server Status|SNMP
    Subagent Configuration form affects only the SNMP subagent, which is a separate entity from
    the collector process (snmpcoll). Currently, snmpcoll does not look
    at the SNMP configuration data when it starts up. It is started by
    the dispatcher and terminates when the dispatcher terminates. Many
    of the statistics are supposed to reflect cumulative values recorded since MTA
    initialization, such as the total number of messages sent and received.
    As a convenience, the collector process collects information in the
    background even while the SNMP subagent is turned off; this way,
    the values are available when the SNMP subagent is configured and
    turned on.

    Collections fall off on the Date of First Deliquency 7-7.5 years later; that is supposed to be reported as the first time you went late (1-30 days) on the OC (original creditor) in the chain of events leading up to it's being farmed out for collection as I underestand it. DOFD though sometimes doesn't get reported right, and by default it will be the date the collection is added to the bureaus. As an example I have an awkward collection (not sure how I got it looking at the payment history thought I'd cancelled that account but TWC billing apparently didn't think so) which I went late on in 2009, but didn't get farmed out till late 2010.  The DOFD is 6/09 looking at it, and it's expected to come off according to the bureaus 6/16 as a result. Different negatives have their own rules though.

  • Auto statistics collection disabled during  OEM 12c installation

    During 12c Oracle grid control process, it disabled statistics auto collection. How do I enable it? or OEM grid control supposed to have that disabled?
    How do we proceed with statistics then?
    Thanks.

    I know how to enable the auto statistics collection. But want to be sure why 12c grid control installation disabled it. is it for a purpose? can I enable it?

  • Doubt regarding automatic statistics collection in Oracle 10g

    I am using Oracle 10g in Linux
    Does statistic collection for tables throughout the database happen automatically or should we manually analyze the tables using
    Analyze command or DBMS_STATS package ?
    AWR collects statistics(snapshots) every 1 hr but does it mean it collects only session and database related statistics and not the table related statistics?

    I am using Oracle 10g in Linux Version and os name and version?
    AWR collects statistics(snapshots) every 1 hr butIt's performance related statistics. Read about data gathering and AWR.
    Note that AWR is an extra licensable feature thru Management packs.

  • Statistics Collection to a Table

    Hello,
    i need to gather statistics for few tables from a schema, to a separate table. Basically i have gather the stats into newly created table. my question is how can i do this? i know how to generate statistics using the dbms statspack, but do not have any idea of how to gather these statistics to a separate table>
    could any one shed some light here..
    Thanks..

    Hello,
    i created a table using the following dbms_stats package.
    BEGIN
    DBMS_STATS.create_stat_table (
    ownname => 'TEST',
    stattab => 'stats_table',
    tblspace => 'users');
    END;
    when this table created using the above script it created with the following columns.
    STATID VARCHAR2(30 BYTE),
    TYPE CHAR(1 BYTE),
    VERSION NUMBER,
    FLAGS NUMBER,
    C1 VARCHAR2(30 BYTE),
    C2 VARCHAR2(30 BYTE),
    C3 VARCHAR2(30 BYTE),
    C4 VARCHAR2(30 BYTE),
    C5 VARCHAR2(30 BYTE),
    N1 NUMBER,
    N2 NUMBER,
    N3 NUMBER,
    N4 NUMBER,
    N5 NUMBER,
    N6 NUMBER,
    N7 NUMBER,
    N8 NUMBER,
    N9 NUMBER,
    N10 NUMBER,
    N11 NUMBER,
    N12 NUMBER,
    D1 DATE,
    R1 RAW(32),
    R2 RAW(32),
    CH1 VARCHAR2(1000 BYTE)
    how can I interpret what column is for what? for example C1 to C5, N1 to N12 or R1, CH1 what do they mean?
    also will be able to get any info regarding the COst of the SQL statement that took to run? if not how can i obtain that info?
    Then I gathered statistics for one table to test.
    exec dbms_stats.gather_table_stats(ownname=>'TEST',
    estimate_percent=>10,
    statown=>'TEST',
    tabname=>'ord_receipts',
    stattab=>'STATS_TABLE',
    statid=>'TESTING');
    the data inserted into STATS_TABLE, but could not understand.
    I need to run these statistics on daily basis and save to a diffferent table daily . for example today is 01/01/2012 should have its own table for stats to collect and 01/02/2012 should have another table to collect the statistics.
    is there any way that i can dynamically incorporated when gathering the statistics, to create the STATS_TABLE concatanated with sysdate daily to analyze the statistics?
    Thanks..

  • Doubt Regarding Statistics Collection in 10g

    Hello,
    Me Jr Dba i have a doubt regarding statistics calculation in 10g.As we know that if we set
    the initilization parameter STATISTICS_LEVEL=Typical then AOS(Automatic Optimizer staistics) calculate the statistics for the tables, whose blocks are greater then 10% changed from the last calculation.Here my doubt is since already statistics are gathered,
    is there any necessity for us to gather the statistics manually by using
    DBMS_STATS.GATHER to see the tables or system statistics.
    Can u plz assist me on the above
    Regards,
    Vamsi

    Hi,
    Please see here,
    http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41448
    If the table/s are changing very frequently than its better to gather the stats manually.This would lead teh volatile table coming up into the stats job again and again.
    For the system stats and data dictionary stats,they are not collected by default.So there is no choice but to gather them manually.
    Aman....

  • Dyanamic sampling and statistics collection

    HI all,
    im a newbie and i have a question. please correct me if im wrong too.
    The documentation I studied specifies that Dyanmic sampling collects the statistics of the objects. im not sure during query execution or while an auto job.
    i also read that starting from 10g , Oracle collects stats for objects as a job (using dbms_stats package). the job is scheduled for new or stale objects , running between 10 pm and 6 am.
    if oracle already runs a job for collecting stats what is dynamic sampling good for.
    Please fill me in . can some body also explaing the query optimizer components.
    thanks in advance.
    Dev

    Assume stats are collected every day at 02:00. Beginning at 08:00 users start making changes. By 11:45 the stats may not bear a close relationship to what was collected the previous morning.
    I thought the explanation in the docs was clear. What doc are you reading (please post the link).

  • Statistics Collection in Oracle 10g

    In Oracle 10g gathering table and index statistics are automatic ?
    or we have to physically gather statistics for table and indexes

    It depends how your database is configured -
    PARAMETER statistics_level should be set to typical and there must be a job NAMED as GATHER_STATS_JOB should be active. you can change the job parameters

  • Query Tuning - Response time Statistics collection

    Our Application is Load tested for a period of 1 hour with peak load.
    For this specific period of time, say thousands of queries gets executed in the database,
    What we need is say for one particular query " select XYZ from ABC" within this span of 1 hour, we need statistics like
    Number of times Executed
    Average Response time
    Maximum response time
    minimum response time
    90th percentile response time ( sorted in ascending order, 90th percentile guy)
    All these statistics are possible if i can get all the response times for that particular query for that period of 1 hour....
    I tried using sql trace and TKPROF but unable to get all these statistics...
    Application uses connection pooling, so connections are taken as and when needed...
    Any thoughts on this?
    Appreciate your help.

    I don't think v$sqlarea can help me out with the exact stats i needed, but certainly it has lot of other stats to take. B/w there is no dictionary view called v$sqlstats.
    There are other applications which share the same database where i am trying to capture for my application, so flushing cache which currently has 30K rows is not feasible solution.
    Any more thoughts on this?

Maybe you are looking for