Increase In Performance Through Re-Indexing
Feb 28, 2011I'm Using Oracle DB, I have got performance issue in one of my portlet, Can Re-Indexing work for Increasing the performance.
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How To Increase DML Statement Performance
Jun 27, 2012How do we increase the DML statement Performance?
View 8 Replies View RelatedPerformance Tuning :: One Job Is Hanging After SGA Increase?
Mar 11, 2013Additional Information
Step 1: Increased Physical Memory on one Node from 32 G to 48 G.
Step 1 Impact : DB was running same as before
Step 2 : Increased SGA from 12 G to 15 G.
Step2 Impact : DB was running same as before for 1 day next day one reporting job was hanging.
Step 3 : Increased DB_CACHE_SIZE from 5G to 7G.
Step 3 Impact : Over all CPU Utilization was high and no effect on reporting job.
Step 4 : Decreased DB_CACHE_SIZE from 7 G to 5 G.
Step 4 Impact : CPU Utilization came down little bit but no effect on reporting job.
Now our main concern is why CPU Utilization is going high. Because same thing we did last time and we got positive results.
SQL & PL/SQL :: Replace The Like Operator To Increase The Performance
Jul 16, 2012How to replace the like operator for increase the performance. Because it is taking more time and not using the index.
SELECT *
FROM emp
WHERE ename like '%AL';
Networking And Gateways :: How To Increase Oracle SQL*Net Performance
Nov 25, 2011One of my MOD_PLSQL based Oracle APEX Application is running on the web. I have almost 1000 web users to access the Application where at least 250-300 users are always on line. In Oracle EM web interface When run ADDM I see suggestions "Investigate the cause of SQL*Net more data to client" or something like this. and I am getting complains about poor server response. Here are my configuration of the system:
Database Server Host: DBServer (Oracle Database 10.2.0.3)
HTTP Server Host: OraHTTP (Oracle Companion CD 10g)
DADS.conf HTTP Server configuration
MOD_PLSQL database access for web clients.
How can I increase database connection performance?
Performance Tuning :: Restart Database After Increase Db_cache_size?
Aug 23, 2012SQL> show parameter sga
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 1152M
sga_target big integer 0
[code]....
in scenario above, the database do not using ASMM, and spfile If I wan to increase db_cache_size parameter, do i need to rebounce instance?
Performance Tuning :: Increase Few Of Columns Size In The Table
Feb 14, 2013We have a table emp_details with 23772889 records. Our requirement is to increase few of the columns size in the table emp_details. We are following the below alter statement which is taking around 2 hours of time.
ALTER TABLE emp_details
MODIFY
(
address char(90)
,department char(30)
)
/
Is there any way to improve the above query performance?
Enterprise Manager :: Increase Performance Of Form And Report Server?
Aug 27, 2009We are just but new oracle 10g(10.1.2.0.2) Database and application server ( form and report server ).have installed application server on window server 2003.
it will running ,but it is used lots of memory.so the performance decrease when user increase.
Performance Tuning :: How To Increase Data Retrieval / Insertion Speed
Oct 24, 2013How To Increase Data Retrieval / Insertion Speed my data base has more than 0.5 million records Forms Some Time Respond Very Slow .
View 8 Replies View RelatedPerformance Tuning :: ORA-01555 - Increase Undo Size Or Retention?
Apr 22, 2013I have got the following error yesterday
ORA-01555 caused by SQL statement below (SQL ID: fdxcyoin67ty8t, Query Duration=380128 sec, SCN: 0x0229.ff00afd0):
following are the existing settings
SQL> show parameter undo
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
undo_management string AUTO
undo_retention integer 96000
undo_tablespace string undo
[code]....
following are the details from v$undostat
select begin_time, end_time, undotsn, undoblks, maxquerylen, maxqueryid, activeblks, unexpiredblks, expiredblks, tuned_undoretention from v$undostat
where trunc(begin_time)=trunc(sysdate)-1 order by begin_time;
BEGIN_TIME END_TIME UNDOTSN UNDOBLKS MAXQUERYLEN MAXQUERYID ACTIVEBLKS UNEXPIREDBLKS EXPIREDBLKS TUNED_UNDORETENTION
-------------- -------------- ---------- ---------- ----------- ------------- ---------- ------------- ----------- -------------------
21-04-13 00:08 21-04-13 00:18 1 12733 378446 duqnawh32hp4u 91152 7068448 225440 345600
21-04-13 00:18 21-04-13 00:28 1 8951 379047 duqnawh32hp4u 99344 7072800 225440 345600
21-04-13 00:28 21-04-13 00:38 1 14073 379650 duqnawh32hp4u 90128 7075872 234656 345600
[code]....
Following are the details in AWR report (00:00 til 01:00 of 21-Apr-2013) .... not thet the error was produced at 00:42
Undo Segment Summary DB/Inst: DBCPY/dbcpy01 Snaps: 18853-18854
-> Min/Max TR (mins) - Min and Max Tuned Retention (minutes)
-> STO - Snapshot Too Old count, OOS - Out of Space count
-> Undo segment block stats:
-> uS - unexpired Stolen, your - unexpired Released, uU - unexpired reUsed
[code]....
Undo Advisor information taken 'now' is as following
SQL> select dbms_undo_adv.longest_query(sysdate-2,sysdate) from dual;
DBMS_UNDO_ADV.LONGEST_QUERY(SYSDATE-2,SYSDATE)
----------------------------------------------
379650
SQL> select dbms_undo_adv.required_retention from dual;
[code]....
In above situation what should be my first choice (assuming increasing space is not an issue) - increase undo tablespace or increase undo retention?
If latter is the choice then what should be the value? Because as I understand present 96000 value is taken as lower limit and because of auto tuning the actual value (TUNED_UNDORETENTION) being used was 345600 In that case shall I set it to something > max(maxquerylen) i.e 379,650 + X?Or I shall increase the undo tablespace size?
From Undo Advisor output it looks to me that even if I increase the undo retention to 379650 current undo size will be able to support it (may be at the expense of DMLs)Is that right?
Parent Key Indexing
Jan 30, 2012I have, for example, two tables: COMPANIES and EMPLOYEES. COMPANIES has a primary key on column COMP_ID. EMPLOYEES has a foreign key EMP_COMP_ID. I always do query COMPANIES with WHERE clause on COMP_ID and COMP_ADDRESS. What indexes on COMPANIES should I create in this case? First unique on COMP_ID, second composite on COMP_ID and COMP_ADDRESS? Or one unique index on COMP_ID and COMP_ADDRESS will be enough?
View 5 Replies View RelatedSQL & PL/SQL :: Implement In Indexing?
Apr 12, 2013what is the best practice to implement in Indexing,is it global indexing or local indexing, I would like implement one of them in object that has been partitioned horizontally.i dont know exactly what to make of it.
View 9 Replies View RelatedSQL & PL/SQL :: Indexing On Subset Of The Record?
Apr 28, 2013 Does Oracle supports an index that only contains a sub-set of the records in a table?
For eg - A table has 1 million records, can we have a index which contains suppose 100k records. We have used a similar logic in DMSII in Unisys. Not so sure if Oracle supports it.
SQL & PL/SQL :: Indexing In Partition Table
Apr 16, 2013i want to ask about indexing in partition table. i have table that indexed by local index. when i want to select all data. I execute this query
select * from Book_Issue_Part where status='Pinjam';
but it does not select all data, only partly data have selected. is it a wrong query to select all data in indexing partition table? so what query should i execute to get all data.
Indexing Mapping And Junction Tables?
Aug 29, 2008however im taking database size into account. i believe there has to be some sort of medium when it comes to infrastructure and performance.
this is specific to tables which map other tables. these tables that im creating usually consist of only 4 columns. 3 columns are mapped ids and the other a date in field. the 3 columns need to be indexed because they are used in joins within views. also those fields in the other tables are indexed as well.
Indexing Changes Most Of The Blocks Of Database On Storage
Jun 20, 2011DB: Oracle 10g R2
OS: SUSE Linux SP 1 x864
We are maintaining a DR of our Database Server(oracle 10g R2 atop SUSE SP1 Linux) using Platespin(
[URL]......
Platespin is set to replicate(block based), incremental data(delta) every 1.5 hour from Production to DR site over a 30 Mbps dedicated fiber link.
Our maximum changes of data per day(during business hours) wont exceed 300 MB. During business hours Platespin replicates at least 1 GB at every replication cycle, while during off hours it replicates 300 to 500 MB per replication cycle. We are facing this strange issue with this box only(SLES 10 SP1 + Oracle 10g R2), we have protected MS Exchange 2007 Server based workloads without this strange issue, i.e in case of Exchange only delta replicates from Production server to DR site on Platespin.
Platespin support says us that Oracle re-indexes its database for better performance, so it is possible that re-indexing causes the blocks level changes on the storage, and since Platespin works on Block level, thats why it replicates so much(even though data is not changed that much)
here is actual words of Platespin support
<snip>
I think whenever Oracle database Indexing happens, it changes almost most of the Blocks of database and Platespin replicate all those Blocks.
As you know, Platespin checks the Date/Time attribute of every blocks before replication and if Date/Time attribute changes from last replication, it considers as changed block and replicate those blocks on Platespin Appliance. So, my suggestion is just look into the Oracle server behaviour before/after Data indexing process and do needful or do some workaround to overcome this issue.
</snip>
is there anything we can do at oracle level ?
Two Database - How To Change Indexing Of Primary Key To Skip Some Numbers
May 3, 2011I have two databases called
a) Old Retailer database
b) New Retailer Database
We cant delete old database but we are using and we want to use both of them.
Now problem
Both dbs have a table called retailer.
I want to prevent duplication in them.
I.e it there is a retailer 12 created in old one new one shldnt allowo us to create retailer
id---12
similarly if there is a retailer 13 in new one it shouldnt be created in old table
retailer ids are unique. its not the case that with retailer id for example 5 there is a
different retailer in these two tables of diffferent DBS. Its unique
Now I have to put this criteria
how can i do it?
Second questions===================
if a primary key is auto increment. how can i skip some numbers lets say it is 1,2,3,4
i want that when next record shld be inserted it shld be 6 not 5. i dont want to feed the value 6. i want to know how to change indexing of primary key to skip some numbers when its set to auto increments.
Rapidly Increase Of Sys-aux?
Nov 20, 2012when i check the free space of tablespaces,i found that sysaux increase so rapidly that i must increate in less than a week!when i checked the sysaux using v$sysaux_occupants ,and i found than
select occupant_name,space_usage_kbytes from v$sysaux_occupants;
the result :
OCCUPANT_NAME SPACE_USAGE_KBYTES
SM/AWR 3159680
[code]...
i also use the package: exec dbms_workload_repository.drop_snapshot_range(),it din't work!!!!
in my test db,i rebuild awr,it works ,but is there any risk to rebuild in my real db?
SQL & PL/SQL :: How To Increase Column Scale Value
Mar 20, 2012I am trying to increase the column value for example now the column values is (rate(15,2)). I want to change it to alter table table1 modify(rate(15,5)); when i change I get an error saying that ORA-01440: column to be modified must be empty to decrease precision or scale. How to change the value of the column when there is a record in the table.
View 2 Replies View RelatedPL/SQL :: Increase Time In The Date?
Dec 15, 2012We have oracle 10g R2 on windows...
I have a table test and it contains date datatype column JDATE;
SQL> desc test
Name Null? Type
----------------------------------------- -------- --------------------
EMPNO NUMBER
EMPTYPE VARCHAR2(20)
SALARY NOT NULL NUMBER
JDATE DATE
DEPTNO NOT NULL NUMBERSELECT TO_CHAR(JDATE,'DD/MM/YYYY HH24:MI:SS') JDATE FROM DUAL;
JDATE
1/11/2010 4:17:29 PM
1/11/2010 4:15:47 PM
1/5/2010 3:50:44 PMIn the above case i want to update test table and increase the minut of each row by 1 minut.
like
for 1/11/2010 4:17:29 PM It would be like 1/11/2010 4:18:29 PM.
for 1/11/2010 4:15:47 PM it would be like 1/11/2010 4:16:47 PM.Can we do this...
How To Increase Table Size
Oct 14, 2012I have table and it's size is full when i'm inserting records , records are not inserting , How can i increase table size
View 8 Replies View Related50000 Rows Only From Select - How To Increase
Jun 1, 2012I would like to know how to increase the result set of a 'Select' statement? I did a 'Select' that should have returned 36,000 rows and got only 5000 rows. What access level do I need to change this and what do I need to change? I am trying to do a migration of data from a delimited file to a table in Oracle. Yet, the data has to be filtered out prior to loading to the table?
SQLSELECT MIN(major_zipcode)
FROM TEMP WHERE MAJOR_CITIES IN (select distinct major_cities from temp);
Server Administration :: How To Know DB Size Increase Per Day
Jan 31, 2011How to know DB size increase per hour or day on the Oracle?
View 3 Replies View RelatedHow To Increase TOAD Timeout Interval
Jun 8, 2006When I connect to a Oracle database(remote) using TOAD client, because of the settings of timeout done at the server end(in Oracle), the TOAD session gets time out in 5 minutes.
I want to know how I can increase the timeout interval or if I can keep on pinging the database server so that the TOAD connection does not gets timeout?
PS: When we connect to a unix server using putty, we can keep on pining the server at regular timeout interval by going to Change Settings->Connection->Set KeepAlive
Is there a similar way for TOAD?
Server Administration :: Increase SGA Parameter
Jul 22, 2010SQL> alter system set sga_max_size=1G scope=spfile;
System altered.
SQL> startup force
ORA-12545: Connect failed because target host or object does not exis
SQL> show parameter sga
ERROR:
ORA-03114: not connected to ORACLE
SQL> startup force
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup force
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
Increase Datatype Of The Column Which Already Has Data?
Apr 22, 2013How to increase datatype of the column which already has data i.e. varchar 10 to 25 bytes
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Jul 30, 2013Tengo instalado el Oracle 9i en un windows server 2003 a 32 bits pero solo reconoce 2 gb de ram de memoria, como puedo hacer que reconozca mas memoria?
I have installed Oracle 9i on windows server 2003 32 bit but only recognizes 2 gb ram memory, what can i do to recognize more memory?
Increase Undo_retention Value Or Undo Tablespace Size?
Aug 18, 2010When i takeind export i got error like this..
ORA-39125: Worker unexpected fatal error in KUPW$WORKER.GET_TABLE_DATA_OBJECTS while calling DBMS_METADATA.FETCH_XML_CLOB [TABLE_DATA:"POS"."TBK_POS_FACT":"KROATL200404"]
ORA-01555: snapshot too old: rollback segment number 1 with name "_SYSSMU1$" too small"
from this can we increase the undo_retention value or undo tablespace size?
Server Administration :: Unable To Increase Size Of Sga
Feb 2, 2012I am trying to increase the size of sga or you can say that i want to make my sga in automatic memory management...Following is the steps i am trying
SQL> show parameter sga_max_size;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
sga_max_size big integer 96M
SQL>
after that i am trying to increase the size
SQL> alter system set sga_max_size = 200m;
alter system set sga_max_size = 200m
*
ERROR at line 1: ORA-02095: specified initialization parameter cannot be modified
Server Administration :: Increase Size Of Database To 50 GB
Jan 31, 2013I have Oracle 11gR2 running on windows xp machine. Windows xp has total size of 150 GB and free space of 95 GB.
I checked the size of the database that I created. It showed the total size of the database as 2 GB and used space as 2 GB. If I want to increase the total size of the database to 50 GB, what should i do? Now which is the disk space size? Windows or Oracle?
