SQL Queries Taking Long Time After 11g Data Migration
Sep 14, 2010
I have upgraded oracle database from 9i to 11g using export and import utility. After migration we are facing performance issue in report generation, We have observed that First execution of report is taking very long time and when we generate the same report 2 -3 times there is considerable change in the execution time and it is more better than the first execution.
2 days back I have restarted the database and found the same issue. There are around 300 Reports and it is not possible to generate all the reports 2-3 times every time we restart the database.
We are firing a normal Drop command on our database and the database version is 10.2.0.4.The database is running on AIX v5.The command is taking more time than usual .
When i am monitoring the session i can see that a call is being made to procedure "aw_drop_proc".Could i ask you if this is something that is taking more time than usual.
We are not having any partitions on the nested tables .We have a pack of tables and we are dropping this pack through a procedure.The pack comprises of nested tables & normal tables.To drop a nested table it is taking around 6 seconds(Table with no rows) and a normal table(With no rows) it is taking 17 milli seconds.We have a partition on Normal table.
The same operation in windows is taking very less time when compared to AIX.
create or replace PROCEDURE TESTPERFORMANCE ( o_statuscode OUT NUMBER, o_statusdescription OUT VARCHAR2, starttime out timestamp, time_after_query_TESTJOB out timestamp,
[Code]...
This procedure is taking around 35 minutes when there are 35000 records to loop over (i.e cursor has 35000 records) and TESTJOBTRANSACTIONS table has 90000 records. How to reduce execution time.
Expdp directory=xxx.dmp dumpfile=aaa.dmp logfile=xxx.log FULL=Y : :: : : :: : : : ; Estimate in progress using BLOCKS method... Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA Total estimation using BLOCKS method: 24.87 MB Processing object type SCHEMA_EXPORT/USER
[code]...
then my export hangs..... checked in alert log nothing found.and then killed the job and reran again but same....checked the status and it's saying EXECUTING.
We have data archive scripts, these scripts move data for a date range to a different table. so the script has two parts first copy data from original table to archive table; and second delete copied rows from the original table. The first part is executing very fast but the deletion is taking too long i.e. around 2-3 hours. The customer analysed the delete query and are saying the script is not using index and is going into full table scan. but the predicate itself is the primary key,More info below
Plan hash value: 2798378986 ------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | -------------------------------------------------------------------------------------| 0 | DELETE STATEMENT | | 2520 | 233K| 87 (2)| 00:00:02 || 1 | DELETE | MON_TXNS | | | | ||* 2 | HASH JOIN RIGHT SEMI | | 2520 | 233K| 87 (2)| 00:00:02 || 3 | INDEX FAST FULL SCAN| OTW_ID_TXN | 2520 | 15120 | 3 (0)| 00:00:01 || 4 | TABLE ACCESS FULL | MON_TXNS | 14260 | 1239K| 83 (0)| 00:00:02 |
------------------------------------------------------------------------------------- PLAN_TABLE_OUTPUT -------------------------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): ---------------------------------------------------
How can we tune our RMAN Duplicate as it was taking 10+ hours to finish. Current production database size is 800GB. Approx duration of rman online backup (FULL, including archived logs) is 4 to 5 hours.
Here's the rman backup script we used: sql 'alter system archive log current'; list archivelog all; run { show all; report schema; backup database plus archivelog delete all input; } exit
Here's the rman duplicate command we used: run { set until time "to_date(to_char(sysdate,'Mon DD YYYY') || ' 02:30:00', 'Mon DD YYYY HH24:MI:SS')"; allocate auxiliary channel ch1 type disk; duplicate target database to testdb; } exit
An user is running some queries and that's making database hang. I want to view what queries this user is running. Can this be done by session auditing turning on?
A external reporting application ( SQL SERVER REPORT SERVICES) sends in some comma separated parameter values, which has to be queried against a table with 6-10 million records.
Length of the comma separated value can go upto 5000-6000 in length based on user input in the front end application. This application sends this value in comma separated. i.e., like
'AA1-11101,AA2-34346,AA4-534399,.....' like this at a time the application can send upto 500 values each of length 10. i.e, maximum length can be upto 5000. I used CLOB to handle this because since the length can be 5000 and varchar2 can handle only 4000 long literals.
But the time taken by the CLOB to verify against the table using INSTR is more compared to VARCHAR2.
I found that VARCHAR2 does'nt take much time. Is it a good idea to have VARCHAR2 in the PLSQL procedure as parameter instead of CLOB, since PLSQL VARCHAR2 can handle upto 32000 long values.
I want to know how I can find which query is taking more time , for example some query's are run from unix, java and from toad,sqlplus. and one query is taking much more time to execute, so how i can get that query and all the details.
I have a query which is executing fast in dev env,but very long time in qa env.What is the criteria when this behaviour occurs.Though qa is having more data than dev.But still it is taking long time for 1 rows also.When I am using the query rownum<=1.So What to check for this.
My oracle database version is 11.2.0.3.0 where i am having one schema in that schema i am having 3 same tables with same structure same data but with different name.
but problem is in first table when i perform select query it takes 5 sec, in another table it is taking 0 sec and in third table it is taking 10 sec.
My Database version as followsOracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64biPL/SQL Release 10.2.0.4.0 - ProductionCORE 10.2.0.4.0 ProductionTNS for Linux: Version 10.2.0.4.0 - ProductionNLSRTL Version 10.2.0.4.0 - Production We have datagaurd setup as well - Huge archive logs are generating in our primary database - Archive logs are shipping to standby with no dealy - But applying the archive logs are taking more in our physical standby database -why it was taking more time to apply archivlogs (sync) in standby ? - What could be possible reasons..? Note : Size of standby redo logs are same as redo log file of primary database - Also standby by redo one or more than online redo log primary. Since i need to report my higer leve stating this is cause for delay in applying archive logs.
update tab1 set col1 = ( select col2 from tab2 where tab1.id = tab2.id) table 1 has arnd 10,000 rows
table 2 has arnd 1,700,000 rows and has a primary key on column id.This query is taking around 20 secs to execute. I checked the x-plan and most of time taken for table access by index rowid.I checked the stats for the tab2, its just three days old.
We are inserting data using JDBC (Java program) in Oracle 11gR2 DB and Timesten to oracle (using AWT cache group) . In reality insertion in oracle is faster than Timesten Cache DB.
Timesten version - TimesTen Release 11.2.1.7.0 (64 bit Linux/x86_64)
1. It is Client/Server Model. 2. Cpu has 4 core and we are using 3 core for insert the Data. 3. Perm and Temp size is big enough compare to Data Size 4. auto commit=0 5. durable commit=0 6. PassThrough=1 7. LogBufParallelism=3 8. LogPurge=1 9. LockWait = 0.1
In my code I am using delete statement which is taking too much time to execute.
Statement is as follow:
DELETE FROM TRADE_ORDER_EMP_ALLOCATION T WHERE (ARTEMIS_SOURCE_SYSTEM_ID,NM_ARTEMIS_SOURCE_SYSTEM,CD_BOOK_KEY,ACTIVITY_DT) IN (SELECT ARTEMIS_SOURCE_SYSTEM_ID,NM_ARTEMIS_SOURCE_SYSTEM,CD_BOOK_KEY,ACTIVITY_DT FROM LOAD_TRADE_ORDER WHERE IND_IS_BAD_RECORD='N');
Every column in "IN" clause and select clause is containing index on it
Every time no of rows which to be deleted is vary (May be in hundred ,thousand or hundred thousand )so that I am Unable to use "BITMAP" index on the table "LOAD_TRADE_ORDER" column "IND_IS_BAD_RECORD" though it is containing distinct record in it.
Even table "TRADE_ORDER_EMP_ALLOCATION" is containing "RANGE" PARTITION over it on the column "ARTEMIS_SOURCE_SYSTEM_ID". With this I am enclosing table scripts with Indexes and Partitions over it.
way for fast execution in of above delete statement?
I am working on oracle 11g...I have one normal insert proc
CREATE OR REPLACE PROCEDURE test2 AS BEGIN INSERT INTO first_table (citiversion, financialcollectionid, dataitemid, dataitemvalue, [code]....
I am processing 1 lakh rows.tell me the reason why bulk collect is taking more time. ? According to my knowledge it should take less time. do i need to check any parameter?
How can I convert a DATE to EPOCH time taking care of daylight savings?
I tried with this code but there is a difference of 36000 seconds. eg:Sysdate_To_Epoch('04-Sep-2012') gives 1346716800 whereas it should give 1346680800.
CREATE OR REPLACE FUNCTION Sysdate_To_Epoch(v_date IN DATE) RETURN NUMBER IS
I want to use a function in join clause. so i go for pipelined function(using for loop to get record & 1 more loop to fetch in table type variable). i achieved what i required. but problem is it takes much time to fetch data. is there any other approach which returns table records without pipelined function.
select serialnumber from product where productid in (select /*+ full parallel(producttask 16) */productid from producttask where startedtimestamp > to_date('2013-07-04 00:00:00', 'YYYY-MM-DD HH24:MI:SS') and startedtimestamp < to_date('2013-07-05 00:00:00', 'YYYY-MM-DD HH24:MI:SS') and producttasktypeid in
I am executing below two SQL's at a time in a .sql file and I want the total execution time of these two queries:-
set timing on; select 1 from dual; select 2 from dual;
The output of the above sql file is returning the results like below which is expected:-
1 ---------- 1
Elapsed: 00:00:00.01
2 ---------- 2
Elapsed: 00:00:00.00
I want the total execution time of the two SQL queries at a time, I mean post execution of the two queries I want to know the total execution time, in this case is execution case will be 00:00:00.01.
I am try to import 4G dump in Oracle 11R2 version, in that we have around 9000+ Package Body which is taking huge time than other objects (about 8 to 12 hrs) and also it is expecting lots of system space (roughly about 10GB).
I have tried both parallel and non-parallel.how to improve speed of the package body import.
Details about the Schema & Import No. of objects in Schema
SQL> select object_type,count(1) from user_objects GROUP BY ROLLUP( object_type);
OBJECT_TYPE COUNT(1) ------------------- ---------- FUNCTION 248 INDEX 5161 JAVA CLASS 471 JAVA RESOURCE 1 JAVA SOURCE 16 LIBRARY 1
