Table Scan From The Application?
May 21, 2013
We have an application where delete statement is taking a long time ( 30-40 seconds).v$session_longops shows the sql statement is doing a full table scan. The statement is "delete tablename where column_name =:B1". The table is indexed and the indexed column is being used in the where clause. When I do an explain plan on the same statement with a value for column_name, it uses an index scan. The table has 9 million rows and the delete statement deletes 15 rows. Not sure why SQL when running through the application does not use index. The stats are current.
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Apr 9, 2013
We are using oracle 11.2.0.3.0 with 3 node rac. Earlier 3 scan vip and 3scan listener running on each node.But we found recently node1 running using 2vip and 2scanlistener and in node2 1vip and 1scanlisteners were running.but no longer running scan vip or scan listener in node 3. If i decided to reloacate the scan vip/Scan_listener to node3 from ndoe 1 using below command,does it cause any impact on my transcation?
$ srvctl relocate scan -i 2 -n node03
$ srvctl relocate scan_LISTENER -i 2 -n node03
find the below details
$ bash
bash-4.2$ srvctl status scan
SCAN VIP scan1 is enabled
[Code]....
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Oct 4, 2012
We have java application which uses the ons configuration. Currently app's ons nodes parameter is pointing to vip i.e Node1-vip:6200,Node2-vip:6200. Will Ons nodes parameter support the RAC scan? Can i change to Nodes:RAC-scan:6200?
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Aug 17, 2012
How to set the password for SCAN listener in 11gr2 ?
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Sep 3, 2012
I am running a two node rac on grid 11.2 and db 11.2.0.3. My application does not like the scan listener, therefore I have to configure the remote listener parameter to the vips of the two hosts, which is working fine.
But it comes out the the system needs the service registered with the scan listener. So. How can I add a static service entry for my scan listener ?
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Sep 24, 2012
Grid Version : 11.2
OS : Unix, Unix-like
For one of our Java applications, the Oracle Client installed in the apps server was 10.2 . One of the SCAN LISTENERs were down in the cluster. When DNS resolves the scan name to that particular SCAN IP where the listener is down, the connection will fail. But , after they upgraded the oracle client to 11.2 , the issue seems to be resolved. It seems that the client is skipping the faulty SCAN IP which doesn't have scan listener running. Are 11.2 and higher Oracle clients intelligent enough to check this ?
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Feb 3, 2012
when i am Executing the following statement
SELECT DISTINCT EXPOSURE_REF FROM KBNAS.VW_EXPOSUREDETS_FOR_CCYREVAL
WHERE EXPOSURE_CURRENCY='THB' AND BASE_TXN_CCY='USD' AND BRANCH_CODE='7000'
AND (REVAL_STATUS='O') AND CONV_RATE<>'62' AND (EXPOSURE_AMOUNT<>0)
UNION
SELECT DISTINCT ED.EXPOSURE_REF FROM KBNAS.EXPOSURE_DETAILS ED,
[code].....
I have attached DDL for table EXPOSURE_DETAIL(PARTITION),LEDGERCARD,LEDGERCARDDETAILS, DDL for INDEX on those tables and DDL for Views..
Issue: we have created the Indexes but when we check the explain plain .. full table scan is going on..I have attached the explain plan ..
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Nov 5, 2013
Getting below error while including TCPS protocal at 1523 port .
bash-3.2$ srvctl modify scan_listener -p TCP:1521/TCPS:1523Exception in thread "main" java.lang.NullPointerException at oracle.cluster.impl.scan.ScanFactoryImpl.modifyScanListener(ScanFactoryImpl.java:978) at oracle.cluster.scan.ScanFactory.modifyScanListener(ScanFactory.java:510) at oracle.ops.opsctl.ModifyAction.executeSCANListener(ModifyAction.java:1600) at
[code]...
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Aug 18, 2012
I�m Using Oracle 11.I have a table with 16 million rows and an index (let's call it the employee table with an index on department). I need to select all the employees whose departments are located in the uk. I achieve this by selecting all the department numbers from departments where location = 'UK' in a sub select then plug this into the main query as follows:
SELECT *
FROM employees
WHERE department IN (SELECT department from departments where location = 'UK');
It takes ages, 25 seconds or more, the explain plan shows its doing a full table scan on emplyees. I need it to use the index. The sub query is instant and returns only 5 rows. If I explicitly put the 5 numbers in the IN clause the query uses the index and executes in 0.04 seconds. See below:
SELECT *
FROM employees
WHERE department IN (1,2,3,4,5);
I need it to use the subquery once and then use the index on the main table.
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Apr 23, 2012
I am rebuilding some UNUSABLE local index partitions on Oracle 8.1.7.4.0 (64bit) database . The platform is a HPUX machine.
The DDL of the partition table/indexes:
=========================
CREATE TABLE TESTME
( INST_NO CHAR(3) NOT NULL,
ACCT_NO CHAR(16) NOT NULL,
REC_NO CHAR(9) NOT NULL,
TRAN_TYPE CHAR(2) DEFAULT ' ',
STAT CHAR(2) DEFAULT ' ',
[code]...
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Jul 11, 2013
Below query is degrading the performance of database. As we know that, without where clause, query do full table scan.Now, it is written to generate the sequence no.
SQL> explain plan for
2 SELECT NVL(MAX(P.NUM_SERIAL_NO), 0) + 1 FROM CNFGTR_IRDA_ENVELOPE_DTLS P
3 /
Explained.
SQL> select * from table(dbms_xplan.display());
PLAN_TABLE_OUTPUT
----------------------------------------------------------------------------------------------------
Plan hash value: 3345343365
------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------
[code].....
Index is not created on the column.
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May 12, 2011
I have created an non unique index lk_fein on lookup_fein( code,map_id,trash). When I check the explain plan it does a full table scan on lookup_fein. if I force it to use index by it does and the cost also decreases.
SQL> SELECT WORK_FEIN,
2 NON_FEIN ,
3 FI_FEIN ,
4 MFEIN ,
5 TOTAL_FEIN ,
[code]...
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Oct 5, 2013
Let's consider such table that all rows fit into single block:
SQL> create table test as select rownum id, '$'||rownum name from dual connect by level <= 530;
Table created.
SQL> create index i_test on test(id);
Index created.
SQL>
SQL> begin
[code].....
why does approach with full scan take longer even if table occupies only one data block? PS. 11gR2
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Jun 24, 2013
We are going to setup a 4 node rac cluster. So i think we need to configure only one SCAN with 3IP's. And how the scan listeners are configured on these 4 nodes.
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Sep 1, 2011
I am planning to install oracle RAC 11g R2 on RHEL 5.3. I have 2 RAC nodes and one openfiler NAS. I need to understand how will I configure SCAN IP. Do I need to configure it some where in DSN and OS level or just I need to give this IP and SCAN name while grid install and oracle will create these things?overall steps to configure this or direct me to some documentation where this thing is detailed.
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Nov 17, 2012
if i have local index, does query which uses this index always have to scan all partitions?
For example, I have hash-partitioned table on column A. There is local index on column B. I am querying:
select * from my_table where A='ABC' and B>123.
I know that records with A='ABC' are in 2nd partition. Does only 2nd partition of local index will be scanned or all of them must be scanned?
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Jul 8, 2012
I need to create a form that will enable me to scan pages and save it into a specified folder using the scanner connected to the PC.
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Dec 19, 2011
I want to make full table scan of my query so that I can execute it using parallel option & the query will get completed in few mins. Even though I used this hint "/*+ parallel(t2,4) full(t2) */, the query is executing with 8 parallel processes but it is going for "Rowid Range Scan" and it is taking more time to complete. How to make this query to go for full table scan instead of "Rowid Range Scan" so that this query can be tuned.
SELECT /*+ parallel(t2,4) full(t2)*/ID, COUNT (1) FROM acnt_transact t2 GROUP BY ID;
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Sep 19, 2010
scan image from Oracle Form Builder 6i and store the image location in the oracle 9i database. Here important issue is we just store the image location in the database not the image. We'll store the images in a storage device and store the location path in the database. And retrive the image from storage device using the path.
For example: User Scan the image using Form builder 6i then save the image like 1001-DPS-1.jpg in the default location like D:Image.. And in oracle 9i database data save like : 1001 DPS 1 D:Image1001-DPS-1.jpg User_Name Sysdate
Data save automatically in the database when image scanned and saved in physical drive. This is our main purpose.
Is it possible to solve this task using Oracle 9i and Developer 6i?
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May 1, 2012
I am an OEM Gird Control 11g server with Oracle 11.2.0 running on OEL 5.3
I also have 2 node RAC cluster running Oracle 11.2.0 on OEL 5.3. I have installed OEM Agent on nodes of this cluster. I can see them on OEM Grid Console. When I check the configuration of the Database Instance GTRD1 (one of my target instance)I can see that the "Listener Machine Name" is the management IP address of target database server. Similarly Database Instance GTRD2 has the management IP address of target database server. When I click test conenctions it works. This is without entering any reference to this server/IP address in /etc/hosts file.
But when I select targets->all targets->Database Instance GTRD1 and then try to access performance tab, it does not connect. I get this error "The Network Adapter could not establish the connection"
Looking at the "emoms.trc" I find the follwing
2012-04-30 14:02:12,071 [EMUI_14_02_12_/console/database/instance/sitemap] ERROR perf.sitemapPerfChart logp.251 - java.sql.SQLException: The Network Adapter could not establish the connection
The Connect Descriptor was (description=(address=(host=GTRD-scan.GTRD)(protocol=tcp)(port=1521))(connect_data=(service_name=GTRD1)(instance_name=GTRD1)(UR=A)))java.sql.SQLException: The Network Adapter could not establish the connection
The Connect Descriptor was (description=(address=(host=GTRD-scan.GTRD)(protocol=tcp)(port=1521))(connect_data=(service_name=GTRD1)(instance_name=GTRD1)(UR=A)))
But when I enter the scan address in the /etc/hosts as "112.5.14.154 GTRD-scan.GTRD" Then everythign work works.
NOTE: 112.5.14.154 is GTRD1 server and 112.5.14.155 is GTRD2 server
Now my questions are:
1. Do I must enter scan address/ref "GTRD-scan.GTRD" in /etc/hosts?
2. Is there are way to change it to use hostname or the IP address?
3. If I am to use scan address, then how I refer to the other IP address in hosts file?
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Mar 11, 2010
diff of unique scan and range scan?
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Sep 25, 2013
I would like to know, if SCAN IP can be used by clients or applications to FTP files to either of the database nodes?
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Aug 4, 2010
I have installed 2 node RAC -11gR2 on ORACLE VM Server 2.2.1.now, I want to give tnsentry to my dev team to use this RACDB going forward.I am using scan name in tnsnames.ora file. Also I have make scan name entry in /etc/hosts not in the DNS.
I have below entry in RACDB server...
RACDB =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = RWCORA-cluster-scan)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = racdb)
)
now just for testing purpose, I added this tnsentry in my machine to check the connectivity.I have to add scan name with IP address in /etc/hosts --. and try to connect sqlplus sys@rwcdb as sysdba --> not workingI have to add scan name with IP address , and two RAC VIPs (of both nodes) in /etc/hosts -- and try to connect sqlplus sys@rwcdb as sysdba --> then its working...but again SQL*Developer is not able to connect.
I have make below entry in my machine's /etc/hosts file:
10.40.0.51 RWCORARAC1-vip
10.40.0.52 RWCORARAC2-vip
10.40.0.50 RWCORA-cluster-scan
perfect link through which I can connect OCI, JDBC connection from client side.
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Dec 11, 2012
i need scan image from oracle forms 10g by using scanner.
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Mar 18, 2012
Since the past, our developer uses this command
"update props$ set value$ set = 'ZHS16GBK' where name='NLS_CHARACTERSET' ;" and
update props$ set value$='WE8MSWIN1252' where name='NLS_CHARACTERSET';
to update the sys table which is not supported by oracle.
However, I decided to use CSSCAN to scan through the database and see if the new character set will work.But before using CSSCAN, I will like to know which character set to set back as our developer does not know which is the original character set.
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Jul 15, 2011
How can i force a sql use index range scan?
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Aug 29, 2011
I am adding condition in color to my existing query but my query taking too long time after that. This condition calculates last 3 month end dates from given COB (20110516).
SUMMARY is my summarized table and COB is my reference table
Without adding condition in query it gives
INDEX (RANGE SCAN)--PK_SUMMARY(INDEX(UNIQUE))
After adding condition in query it gives
INDEX(FAST FULL SCAN)--PK_SUMMARY(INDEX(UNIQUE))
how can i keep RANGE SCAN even after adding my new conditions?
SELECT
distinct
COB.COB_ID_C,
SUMMARY.SUMM_COB_ID_C
FROM
[code]...
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Jun 14, 2012
Is there any hint to force "Index Unique Scan" over "Index Range Scan".
My query is generating different plans with the above two, and very slow when it uses "Index Range Scan".
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Jun 1, 2010
my problem is this that i have developed a form.fmb in 6i for images scanning direct from scanner but its generating error something like that "FRM-41344 OLE not defined for SCAN in the current record"
li have a winxp enviroment i have already downloaded and installed "IMAGING FOR WINDOW"(GLOBAL 360) but despite this its not working same error is still there .
one more thing why imgscan.ocx is not registering in winxp.
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Oct 16, 2012
I have a query that seems to repeatedly call an index scan on a table for reasons I'm not sure about. Why it would be doing the index scan on totaldwellingarea in the dimensions table (DIMEN_PID_TDWELLAREA) repeatedly? This only seems to happen when I put on the range clause d.totaldwellingarea between scr.lowvalue and scr.highvalue.
I am using Oracle version 9.2.0.3.
select d.propertyid,d.totaldwellingarea, e.size_, scr.size_
from eqid e, dimensions d, brt_eval.size_code_ranges scr
where e.style not in ('1','A','G','L') and e.size_ = '0'
and d.propertyid = e.propertyid and e.style = scr.style and d.totaldwellingarea between scr.lowvalue and scr.highvalue;
CREATE
TABLE "BRT_ADMIN"."EQID"
(
"PROPERTYID" VARCHAR2(20 BYTE) NOT NULL ENABLE,
"EQID" CHAR(10 BYTE),
"ZONE_" CHAR(1 BYTE),
"AREA" CHAR(1 BYTE),
[code].....
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