Performance Tuning :: How To Find All Indexes Scripts In Particular Schema
Aug 16, 2012getting all indexes script in particular schema.
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Performance Tuning :: How To Find Local And Global Indexes On Particular Table
Mar 19, 2012getting how many local and global indexes on particular oracle table
View 2 Replies View RelatedPerformance Tuning :: Practices With Indexes?
Dec 10, 2010So I was reading about indexes here:[URL]...1Is there any reason to NOT use an index? If there aren't, then should you use an index on every column on every table?
What is the general best practice with indexes? After reading the section, it seems that there are only positive impacts of using an index, so why are they not automatically created?
Performance Tuning :: What Does Analyzing A Table Do For Indexes
Sep 26, 2012what analyzing a table does to existing indexes? Do I need to rebuild the indexes after dbms_stats.gather_table_stats command ?
View 4 Replies View RelatedPerformance Tuning :: Unable To Avoid Indexes
May 20, 2011Below query is getting delayed becasue of BitMap Indexes on the table. I am trying to avoid indexes by using Hints in the query but unable to do so, Details are as follows.
explain plan for
SELECT cbu_cid, cbu_cid_customer_en_nm,
COUNT (billg_acct_no) AS billg_acct_no,
SUM (subscriber_cnt) AS subscriber_cnt
FROM daily_view
WHERE (billg_system_id = 'TM' AND mktg_sub_segment_a_nm = 'TM')
AND (cbu_cid NOT IN ('0001988048', '0001379962', '0001350469'))
GROUP BY cbu_cid, cbu_cid_customer_en_nm
HAVING SUM (subscriber_cnt) > 10
ORDER BY subscriber_cnt DESC;
[code]....
I have tried with ALL_ROWS & PARALLEL.how to avoid above two indexes in a query.
Performance Tuning :: How To Partition Tables And Indexes
Jan 12, 2011So our situation is pretty simple. We have 3 tables.
A, B and C
the model is A->>B->>C
Currently A, B and C are range partitioned on a key created_date however it's typical that only C is every qualfied with created date. There is a foreign key from B -> A and C -> Bhave many queries where the data is identified by state that is indexed currently non partitioned on columns in A ... there are also indexes on the foreign keys that get from C -> B -> A. Again these are non partitioned indexes at this time.
It is typical that we qualifier A on either account or user or both. There are indexes (non partitioned on these) We have a problem with now because many of the queries use leading wildcards ie. account like '%ACCOUNT' etc. This often results in large full table scans. Our solution has been to remove the leading wildcard.
We are wondering how we can benefit from partitioning and or sub partitioning table A. since it's partitioned on created_date but rarely qualified by that. We are also wondering where and how we can benefit from either global partitioned index or local partitioned indexes on tables A. We suspect that the index on the foreign key from C to B could be a local partitioned index.
Performance Tuning :: Couldn't Have Indexes On Tables In Production
Sep 27, 2013I have tried a lot by alternate solutions like rearranging the order of tables in join and moving where conditions before but no success...Its a bottleneck and I could not have indexes on these tables in production...I want to change the approach in subquery
SELECT
g.COLUMN1,
g.COLUMN2,
e.COLUMN3,
g.COLUMN4,
MIN(e.dat1) KEEP ( DENSE_RANK FIRST ORDER BY date2 Desc) * -1,
min(to_char(date3,'dd-mm-yyyy'))
[code]....
Performance Tuning :: How Many Block Of Query Is Fetching With Or Without Indexes
Jun 1, 2012I don't have any dba privileges, can you share a scripts which can tell how many block my query is fetching with or without indexes. How do i also get buffer hit, how can i get i/o without sql trace as i don't have access to dump_dest
I have a below query
SELECT DISTINCT ser_id AS STA_ser_id, rct_name AS STA_name
FROM sd_servicecalls, rep_codes, rep_codes_text
WHERE ser_sta_oid = rcd_oid
AND rcd_oid = rct_rcd_oid
AND rct_name IN ('New', 'Awaiting Approval', 'Approved', 'In Progress', 'Awaiting Supplier', 'Awaiting RFC', 'Awaiting Release', 'Pending Release', 'On Hold', 'Resolved', 'Implemented', 'Closed');
Does large hash value in explain plan mean more resource needed and more time to execute the query, How can i use ADDM for the above sql.
Performance Tuning :: ORA-00439 / Feature Not Enabled / Bit-mapped Indexes
Mar 29, 2004I am having Oracle 9i relaese 2 on my db server. I am getting the following error every time I try to create a bitmap index:-
ORA-00439: feature not enabled: Bit-mapped indexes
I have queried the v$option table .Here the value of parameter Bit-mapped indexes is FALSE.
The result of v$version is :-
Oracle9i Release 9.2.0.1.0 - 64bit Production
PL/SQL Release 9.2.0.1.0 - Production
CORE 9.2.0.1.0 Production
TNS for Solaris: Version 9.2.0.1.0 - Production
NLSRTL Version 9.2.0.1.0 - Production
Actually when we created the database our installation was halted . so we manually created the database using Create database command.
How can we enable the BITMAP Index Feature now.
Performance Tuning :: Creating Normal / Composite Indexes On Fields
Feb 14, 2013I Want to tune the attached query. I have tried by creating the normal indexes and composite indexes on the fields . I feel that , Only normal index is required for this instead of composite index?
11:15:19 SQL> @slot.sql
11:16:03 SQL>
11:16:03 SQL> drop table slot purge;
Table dropped.
Elapsed: 00:00:00.05
11:16:03 SQL>
11:16:03 SQL> create table slot
11:16:03 2 (
11:16:03 3 id varchar2 (40) not null,
[code]....
- dynamic sampling used for this statement
22 rows selected.
Performance Tuning :: Only LOCAL Bitmap Indexes Are Permitted On Partitioned Tables
Feb 4, 200516:28:32 SQL> create bitmap index bp_idx_ag_id on transactions(type);
create bitmap index bp_idx_ag_id on transactions(type)
*
ERROR at line 1:ORA-25122: Only LOCAL bitmap indexes are permitted on partitioned tables
how to create bitmap index on partitiioned tables
Performance Tuning :: Create Small Functional Indexes For Special Cases In Very Large Tables
Apr 5, 2012Create small functional indexes for special cases in very large tables.
When there is a column having one values in 99% records and another values that have to be search for, it is possible to create an index using null value. Index will be small and the rebuild fast.
Example
create index vh_tst_decode_ind_if1 on vh_tst_decode_ind
(decode(S,'I','I',null),style)
It is possible to do index more selective when the key is updated and there are many records to create more levels in b-tree.
create index vh_tst_decode_ind_if3 on vh_tst_decode_ind
(decode(S,'I','I',null),
decode(S,'I',style,null)
)
To access the record can by like:
SQL> select --+ index(vh_tst_decode_ind_if3)
2 style ,count(*)
3 from vh_tst_decode_ind
4 where
5 decode(S,'I','I',null)='I'
6 group by style
7 ;
[code]....
Performance Tuning :: Query Running For A Long Time In Second Schema
Apr 27, 2012I have a Query(report) which is running in <5 mins in one Scheme, where as the same is running for a long time in second schema. I have identified that an Index is scanning for more than 2000 Millions of records in second Schema, but this is scanning only 440 Millions in First Schema and hence it is fast. I am expecting the same to be done in Second schema.
I have verified the following
All records in tables in 2 schemas are same.
All indexes are same
Analyzed the tables
Gathered Histogram on all the columns as per the first schema.
But now i still have the same problem, don't know what could be the problem.
Table_nameNum_RowsBlocks
PRPSL_LST_T5866107159
PRPSL_WKFLW_ACTVTY_T5829904030
ITEM_CHR_VAL_T5134340104049020
ITEM_RGN_ASSN_T8571220137215
Also attached 2 screen shots of OEM Plans..
Performance Tuning :: Auto-Stats Gathering Not Including Schema?
May 16, 2011I have several databases that i've recently upgraded from 9i to 11g. With all of them, the automatic stats gathering process has worked just fine every night during the maintenance window.
However, i have this other database that i created and it seems that the only stats being gathered are on the sys and system schemas and not the actual schema that holds all of our tables.
I did some searching, but i'm not sure i was using the right search terms, because i came up empty.
BANNER
-----------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Solaris: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
Performance Tuning :: How To Find Index To Rebuilt
Oct 3, 2011i am trying to find the index want to rebuild or not for that i have analyzed that index after that i don't know how to calculate the ration could any one steps to do calculate the following ratio
Run the ANALYZE INDEX command on the index to validate its structure and then calculate the ratio of LF_BLK_LEN/LF_BLK_LEN+BR_BLK_LEN and if it isn?t near 1.0 (i.e. greater than 0.7 or so) then the index should be rebuilt. Or if the ratio BR_BLK_LEN/ LF_BLK_LEN+BR_BLK_LEN is nearing 0.3.
Performance Tuning :: How To Find Literal SQL Statement
Jan 30, 2012Is there is any view/query from where I can find how many sql using literals.
View 4 Replies View RelatedPerformance Tuning :: Find SQL Using Hash Value - ORA-00060
Nov 18, 2010Getting an ORA-00060 in our database. This is the alert log:
Wed Nov 10 08:01:54 2010
Global Enqueue Services Deadlock detected. More info in file
/opt/oracle/admin/ngboot/bdump/ngboot1_lmd0_13119.trc.
This is part of the lmd file:
oprocp : (nil)
opid : 0
group lock owner : (nil)
xid : 0000-0000-00000000
dd_time : 0.0 secs
dd_count : 0
timeout : 0.0 secs
[Code] ......
How do I find the SQL causing this? I have the hash value of 3180952482. should I open up en SR as this i logged in an lmd trace?
Performance Tuning :: AWR Report - Find Disk I/O
Mar 11, 2012In AWR report, in order to find the disk i/o, Should I see the avg read(ms) under Tablespace I/O and Filesystem I/O columns?
View 1 Replies View RelatedPerformance Tuning :: How To Find Top Query Running On A Table
Feb 19, 2012How do i find a particular SQL or a set of SQL's which are excuted against a table (user identified table) that is either a very frequently executed query against that table or high impact SQL against that table? I am currently looking through the AWR reports to go through all the queries but i was wondering if there are any dictionary views where we can find this info from?
View 2 Replies View RelatedPerformance Tuning :: Find The Last User Analyzed Particular Table?
Aug 9, 2012How can i find the last user analyzed particular table?
I can able to find last analyzed date, but can't able find the which user has done it.
Performance Tuning :: How To Find Out Queries That Are Executed In Particular Range Of Time
Sep 9, 2011here we have an scenario where we want to find out all the sql statements that are executed in a particular time. The sql statements are executed via our application. I tried in awr report but it shows only the sql query which has taken long time to execute. and i even tried in V$session and V$sqlarea. how to view the executed sql statements in a particular session/current session
View 3 Replies View RelatedPerformance Tuning :: How To Find Percentage Completion Of Query In Running Status
May 2, 2012How can we check completion status for running sql query. i.e. how much % completed
SQL> begin
2 delete from gsmcrmdw.wc_loy_txn_f_aa
3 where integration_id in
4 ( select integration_id
5 from support_olap.recover_wc_loy_txn_f_953to955
6 );
7 commit;
8 end;
9 /
Performance Tuning :: How To Find Tables In Database On Which High DMLs Firing
Feb 4, 2011How to find the tables in the database on which high DMLs are firing.
View 5 Replies View RelatedPerformance Tuning :: How To Find Out Session Consuming High Resource In Past
Mar 28, 2013How can I find out the particular oracle session which was consuming high memory in the past?
I can't get the data in v$sessstat
Unable to get the information in AWR
dba_hist_active_session_history do not have field which indicate memory related information
Shall I concetrate on EVENT in dba_hist_active_session_history which continuosly had sort, direct path read
Or
Locate sql_id from dba_hist_sqlstat with high SORTS_DELTA for snapshots belonging to problematic time period and then using the sql_id query dba_hist_active_session_history
which approach I shall take to find out the session which consumed most memory in the past?
Find Ddl For Any Indexes?
Oct 9, 2012on 11g R2 on Win 2008
How to find ddl for any indexes built on MY_VW ?
SQL & PL/SQL :: Find Out Database Name For Indexes
Jan 15, 2013I am trying to find out database name for the unusable indexes thru the query; I am using dba_indexes for the index name but not sure which view I need to join with to find the db name.
View 11 Replies View RelatedHow To Find Over Fragmented Tables / Indexes
Jun 19, 2012i am using oracle 10g. is there a way to find out the over fragmented tables/indexes ,so that reorganizing or rebuilding them will improve sql performajnce?
View 4 Replies View RelatedQuery To Find Current Queries Not Using Indexes?
Mar 29, 2012hint of which DBA views we need to query to find current running queries which are not using indexex?
I suppose v$session is one , what else we need to look to?
SQL & PL/SQL :: Indexes For Query Performance?
Mar 16, 2010Lot of my tables are just for join purpose , a table with just with two columns both FK , I did not add any composite PK to this table, lot my queries uses this table , because it does not have composite PK will the query be slow ? what I have to do to increase performance querying with such tables ?
View 5 Replies View RelatedPerformance Tuning :: Tools For Database Tuning And Instance Tuning
Jul 12, 2010Looking to understand the difference between instance tuning and database tuning.
What is the difference between these two tuning exercises? I understand that an instance is memory based structures (logical) where as database consists of physical structures.
However, how does one tune a database the physical structure? Does it have to do with file placements/block sizes etc. Would you agree that a lot of that is taken care by ASM now in 11g? What tools are required/available (third party as well as oracle supplied) for these types of tuning scenarios?