Server Administration :: Collect Table Stats?
Oct 10, 2013
We are running 11g (11.2.0.3)We have a "working table" that is empty at the beginning of the day.Then we start adding rows (insert) with a key column called STATE with a value of 100.At the same time, there are other apps that pickup data in state 100 , process that data and change that state to 200 or 300.There is also another app that pickup data in state 200 , process that data and change that state to 300 or 400.
So in summary, the data on that table is at the beginning empty, then all the rows are in state 100, they slowly move to different states (200, 300, etc) and by the end of the day, they are all in 400.
My question is what would be the best way to collect stats on this table?
I was thinking to create an hourly job to collect stats on that table:
exec dbms_stats.gather_table_stats (
ownname => 'SCOTT',
tabname => 'WORK_T
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Aug 29, 2013
Quote:Oracle collects new statistics when enough of the data (about 10%) has changed.I read the above statement in the oracle documentation that Oracle collects new statistics when enough of the data (about 10%) has changed every day during 10 pm to 6am .
But still i see some object statistics are stale and empty.Do i need to collect statistics for these objects manually ? and would like to know why these objects statistics were not collected during maintenance window ?
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Sep 11, 2012
During STATS gather running for the table, unknowingly i deleted the old stats using EXEC DBMS_STATS.DELETE_TABLE_STATS. I would like to know will it affect the stats gather job currently running for the table and whether my stats will be gathered successfully.
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Jan 27, 2011
DBMS_STATS.CREATE_STATS_TABLE
DBMS_STATS.EXPORT_SCHEMA_STATS
DBMS_STATS.GATHER_TABLE_STATS
I have used the above to get a copy of schema stats and gather new stats for specific tables into a STATS TABLE in my personal schema. What I want to do now is use this stats table to generate plans for queries where I believe stats are off. Is it even possible? To be clear, I do not want to import stats because this replaces the stats currently there. I just want to point the CBO to my stats table for generating plans.
there was a session parameter I could set to tell oracle to use my stats table when generating plans, or an explain plan clause I could use or a DBMS_XPLAN paramter I could provide that would tell these tools to use my stats table when generating a plan, or even some way to tell autotrace. But I have found none of this.
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Dec 20, 2011
I've just installed an Oracle 11.2.0.1.0 64 bit server on my windows 7 machine in order to play around while using attempting to run
exec dbms_stats.gather_table_stats('eii','v2x4e')
I get the following:
ORA-20000: Unable to analyze TABLE "EII"."V2X4E", insufficient privileges or does not exist
ORA-06512: at "SYS.DBMS_STATS", line 20327
ORA-06512: at "SYS.DBMS_STATS", line 20360
ORA-06512: at line 1
My initial google searches indicate that I need the select any table and analyze any privileges. I don't think that can be right/appropriate - but I've granted them anyway to no avail.
Select * from user_tables
returns tables in the System and sysaux tablespaces, but not my own schema/tablespace?
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May 27, 2012
what privilege is required to run dbms_stats package for gathering table and schema statistics.
SQL> show user
USER is "JACK"
SQL>
SQL> select * from user_sys_privs;
no rows selected
SQL> select * from user_role_privs;
no rows selected
SQL> select * from role_sys_privs;
no rows selected
SQL> exec dbms_stats.gather_table_stats('JACK','EN1')
PL/SQL procedure successfully completed.
I revoke all the privileges from JACK user but still i am able to gather stats for a table.what privilege is require to gather stats.
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Mar 22, 2012
When we want to gather schema statistics which method we should follow and why ?
exec dbms_utility.compile_schema('SHIKHAR');
or
BEGIN
SYS.DBMS_STATS.GATHER_SCHEMA_STATS (
OwnName => 'JACK'
[Code].....
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Sep 11, 2007
I've got to collect statistics by DBMS_STAT. For the first time, the spcreate.sql is to be called, however, it returned one error following:
If this script is automatically called from spcreate (which is the supported method), all STATSPACK segments will be created in the PERFSTAT user's default tablespace.
Using perfstat tablespace to store Statspack objects
... Creating STATS$SNAPSHOT_ID Sequence Sequence created.
create public synonym STATS$SNAPSHOT_ID for STATS$SNAPSHOT_ID
*
ERROR at line 1:
ORA-00955: name is already used by an existing object Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options
And then, I checked it again with its owner:
SQL> select owner, synonym_name
2 from dba_synonyms
3 where synonym_name='STATS$SNAPSHOT_ID';
OWNER SYNONYM_NAME
------------------------------ ------------------------------
PUBLIC STATS$SNAPSHOT_ID
Then, I checked again after dropping schema PERFSTAT:
SQL> conn /as sysdba
Connected.
SQL>
SQL> select username, account_status
[code]...
What's the STATS@SNAPSHOT_ID synonym? Can I remove it from PUBLIC owner and recreate?
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Sep 11, 2012
Using below script i run stats gather job..But LAST_ANALYZED column is not updated for the table.. Why it was not updated.. My DB version is 11.1.0.7.0
exec DBMS_STATS.GATHER_TABLE_STATS(ownname => 'XXXX', tabname => 'XXXXXX',estimate_percent =>5, method_opt => 'FOR ALL INDEXED COLUMNS SIZE AUTO', degree => 8, granularity => 'ALL',Cascade => TRUE);
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Nov 15, 2011
I am using temporary table.
PROCEDURE Return_Summary(WX IN dbms_sql.varchar2_table,
WX OUT SYS_REFCURSOR) IS
Begin
FOR i IN 1 .. Pi_ WX.count LOOP
/* I need to put this results in a temp table or table object Can I use temp table for this or do we have any other recommended method. The loop might execute max of 10 times and for each run it might return 100-200 records. */
select WX_NM,
WX_NUM
from TAB A, TAB B, TAB C
where A.KEY1 = B.KEY1
and B.KEY1 = C.KEY1
and C.WX = WX(i);
End Loop;
End;
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May 26, 2011
I have doupts in gathering stats on table. I analyzed one table it took 2 hours first time.. the same table after one week later i analyzed, its got completed within 45 minutes.. I don't know exact reason why i got completed very soon. Is there any specific reason?
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Jan 30, 2012
When we upgrade from 10g to 11g oracle upgrades the stats table by EXECUTE DBMS_STATS.UPGRADE_STAT_TABLE('OWNER','TABLE'); But When we import from 10g to 11g do we need to upgarde the stats table??
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Sep 7, 2012
I am trying to generate some statistics on tables connected by a dblink. I know with oracle you have table_columns which you can reference and pull some stats from.
Trying to get the column count and record counts for each table connected by a dblink. I have tried these queries below to see if I could see any db properties: (some just to try something different)
select * from "table_owner".table_column@dblink ;
select * from "status"@dblink;
select /*DRIVING_SITE(a) */ count(*) from @dblink a;
What is the best method to finding this out without spending a lot of time? I have over 30 tables which are with large record sets and would love to learn a faster approach then pulling a sample table and doing a manual count and query for each table to count the rows.
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Aug 8, 2013
Is it possible for the DBMS_STATS "LIST STALE" command to show a stale partition but NOT have its table show as stale?
I had a scenario where the table itself AND 1 partition showed as stale. I ran a fnd_stats gather table stats just on that 1 partition. Once it was completed it showed the partition to no longer be stale. it also showed that the table was no longer stale. so I guess I do not need to run stats on the whole table as well?
so if this is the case, when would I need to run stats on the full partitioned table if running it on the partitions themselves removes the staleness of the table?
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Jun 2, 2010
1. how can i impose a restriction on a table so that the data gets updated only specific period of time say 9 a.m. to 10 p.m.
2. Can i use bulk collect in dynamic sql? If yes how?
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Aug 6, 2012
Our UNDO space remains at a high level 85 to 95 percent. We keep adding database files and it doesn't seem to go down significantly. When we do a backup of the system where we shut the database down, it does go down some but then within a week or so it is back up again.
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Sep 29, 2011
Using the Bulk collect for insert into table,it's raising the below error.
ORA-00600: internal error code, arguments: [25027], [130], [1], [], [], [], [], [], [], [], [], []
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Jan 26, 2012
I have created a table like below-
PROMPT CREATE TABLE tst_fetch_vendor_data
CREATE TABLE tst_fetch_vendor_data (
vendor_data_seq_no NUMBER NOT NULL,
study_seq_no NUMBER NOT NULL,
vendor_record_seq_no NUMBER NOT NULL,
control_column_seq_no NUMBER NOT NULL,
resolved_value VARCHAR2(4000) NULL,
original_value VARCHAR2(4000) NULL,
transaction_user VARCHAR2(30) NOT NULL,
[code]....
Its just a temporary table, in which data comes and goes. I am using this in middle of a process.I am using it in a process like below--
--EXECUTE IMMEDIATE 'TRUNCATE TABLE TST_FETCH_VENDOR_DATA DROP STORAGE';
insert /*+ append */ into tst_fetch_vendor_data
(select * from vendor_data vd
where vd.control_column_seq_no in
(select control_column_seq_no from temp_control_column));
dbms_stats.gather_table_stats('EPDSYSREP','TST_FETCH_VENDOR_DATA',ESTIMATE_PERCENT=>100,
METHOD_OPT=>'for all indexed columns size auto',CASCADE=>True);
code to use that table..This table can contain data from 0 to 108000000 records.Now my questions are-
1. How much should I select sampling size (currently its 100%)Can I use dbms_stats.auto_sample_size, what will be the effect?
2. dbms_stats is good approach or should I use dynamic sampling.
3. what about the approach using CTAS instead of inserting data through insert.
4. What about pl/sql table with index or with clause query.
5. Do I need to rebuild index after inserting data into table.
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Sep 11, 2012
I load a table through sql loader which takes nearly 14 min for 8-9 millions records, once the records complete i run the analyze table compute statics to gather stats and it takes nearly 15 min. is there any ways so that i can reduce the stats timing. the stats collection command runs from other schema not from where the table is residing.
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Aug 21, 2011
Table contains 10k records,we are going to insert data into another table with FORALL bulk collect limit 1000. if i use 10000 ,it's completed fast compared to 1000 limit.Can u tell me which one is better Limit.
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Oct 10, 2012
i have a large OLTP database and we are doing table stats copy amount subpartition to save the load on system. while doing an copy default subpartition stats: I see the following error:
SQL> exec DBMS_STATS.COPY_TABLE_STATS('cusms','STATUS_HIST','P_VDEF_10_2012_S100','P_VDEF13_10_2012_S100',force=>true);
BEGIN DBMS_STATS.COPY_TABLE_STATS('cusms','STATUS_HIST','P_VDEF_10_2012_S100','P_VDEF13_10_2012_S100',force=>true); END;
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
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Apr 4, 2011
I was about to move some tables from one table space to another but it seems it is not possible to move partitioned tables between table spaces of different block sizes.
So far the only option I have is to export and then import back the data.
know if there is any way to move a partitioned table between table spaces of different block size?
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Feb 7, 2012
We deleted millions of records from a table.
1.Is it necessary to reorganize a table and index after the deletion of records from table ? Because i see some change in table size after table and index reorganization.
2.Will re org table and index improve the database performance ?
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Sep 8, 2011
There is a huge table,i want to compress it,how can i do? alter table tb_my_table compress After executed the sql,the size of table have any change.
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Sep 26, 2011
My table can not shrink, why?
SQL> Alter Table tb_hxl_user Shrink Space Cascade;
Alter Table tb_hxl_user Shrink Space Cascade
*
ERROR at line 1:
ORA-10635: Invalid segment or tablespace type
SQL> desc tb_hxl_user;
Name Null? Type
----------------------------------------- -------- ----------------------------
STATEDATE NOT NULL DATE
USERNUMBER NOT NULL VARCHAR2(13)
PROVCODE NOT NULL NUMBER
[code]...
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Jan 4, 2012
I have a table: desc STG_XML
Name Null Type
------------------------------ -------- ------------------------
ENTITY_ID NOT NULL VARCHAR2(100 CHAR)
ENTITY_TYPE_ID NOT NULL NUMBER
SOURCE_ID NOT NULL VARCHAR2(512 CHAR)
XML_SCHEMA_ID NOT NULL NUMBER
JOB_ID NOT NULL NUMBER
FINGERPRINT NOT NULL VARCHAR2(100 CHAR)
ENTITY_XML_DATA CLOB()
ARCHIVED NUMBER(1)
CREATION_DATE TIMESTAMP(6)
MODIFICATION_DATE TIMESTAMP(6)
ARCHIVING_DATE TIMESTAMP(6)
CREATED_BY VARCHAR2(50 CHAR)
MODIFIED_BY VARCHAR2(50 CHAR)
The problem is that the data of the table are 40GB while on the DB the table holds 400GB! How can I shrink and reuse that space except from drop/recreate and drop/import?
The table has no initial data, so that I can play with the INITIAL parameter. Data are inserted, updated and deleted all the time. I have run DBMS_ADVISOR which recommended to SHRINK table. I have performed the shrink :
alter table STG_XML shrink space COMPACT;
but I haven't gained any space.
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Oct 17, 2011
How can i check whether a partition tbale have default partition?
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Mar 21, 2007
i want to rename a table that has partitions.
alter table
testora.oldtablename
rename to
testora.newtablename;
ORA-14048: a partition maintenance operation may not be combined with other operations
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Jul 21, 2011
How can i apply composite key on a table?
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Mar 9, 2012
how to find a table is updated and when the table is updated.
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