How to use partioning for big table
Hi,
Oracle 10gR2/Redhat4
RAC database
ASM
I have a big table TRACES that will also grow very fast, actually I have 15 000 000 rows.
TRACES (ID NUMBER,
COUNTRY_NUM NUMBER,
Timestampe NUMBER,
MESSAGE VARCHAR2(300),
type_of_action VARCHAR(20),
CREATED_TIME DATE,
UPDATE_DATE DATE)
The querys that asked this table are and the made a lot of I/O in disks!!
select count(*) as y0_
from TRACES this_
where this_.COUNTRY_NUM = :1
and this_.TIMESTAMP between :2 and :3
and lower(this_.MESSAGE) like :4;
SELECT *
FROM (SELECT this_.id ,
this_.TIMESTAMP
FROM traces this_
WHERE this_.COUNTRY_NUM = :1
AND this_.TIMESTAMP BETWEEN :2 AND :3
AND this_.type_of_action = :4
AND LOWER (this_.MESSAGE) LIKE :5
ORDER BY this_.TIMESTAMP DESC)
WHERE ROWNUM <= :6;
I have 16 distinct COUNTRY_NUM in the table and the TIMESTAMPE is a number that the application insert in the table.
My question is the best solution to tune this table is to use partitioninig to a smal parts?
I need to made a partioning using a list by COUNTRY_NUM and date (YEAR/mounth) , is it a best way to it?
NB: for an example of TRACES in my test database
1 select COUNTR_NUM,count(*) from traces
2 group by COUNTR_NUM
3* order by COUNTR_NUM
SQL> /
COUNTR_NUM COUNT(*)
-1 194716
3 1796581
4 1429393
5 1536092
6 151820
7 148431
8 76452
9 91456
10 91044
11 186370
13 76
15 29317
16 33470
Hello,
You can automate and use dbms_scheduler to add monthly partition. Here is an example of your partitioned table with monthly partitions
CREATE TABLE traces (
id NUMBER,
country_num NUMBER,
timestampe NUMBER,
MESSAGE VARCHAR2 (300),
type_of_action VARCHAR (20),
created_time DATE,
update_date DATE
TABLESPACE TEST_DATA - your tablespace_name
PARTITION BY RANGE (created_time)
(PARTITION traces_200901
VALUES LESS THAN
(TO_DATE (' 2009-02-01 00:00:00',
'SYYYY-MM-DD HH24:MI:SS',
'NLS_CALENDAR=GREGORIAN'
TABLESPACE test_data, -- Here you can put partition on difference tablespaces meaning different data files residing on diferent disks (Reducing i/o coententions)
PARTITION traces_200902
VALUES LESS THAN
(TO_DATE (' 2009-03-01 00:00:00',
'SYYYY-MM-DD HH24:MI:SS',
'NLS_CALENDAR=GREGORIAN'
TABLESPACE test_data);Regards
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LabVIEW Champion -
Install Sun ONE Directory Server 5,2 & how to use it for authenticate user
Good afternoon, Excuse, are newbie in the scope I am learning and putting desire to him, this in my situation I am trying to install Sun ONE Directory Server 5,2 since I understand that this it is application LDAP for Solaris, ok I want to install it to authenticate user against the system, that is to say, to be able to acces the server entering with a created user from the data base of LDAP and make think user that his created in the system. But the documentation that I finds indicates the installation of Sun ONE Directory Server 5,2 but it not clearly about how to use it for authentication. Some one have any manual step by step of Sun ONE Directory Server 5,2 installation and how to make it for authentication systems users.
I read the forum seeking for anwser and i get confuse
Thanks for the help and sorry for any inconvenient
Message was edited by:
Aku_28
Message was edited by:
Aku_28I think that I found the Sun endorsed book locations for using LDAP accounts that don't use authentication besides "crypt". I now can use an account with a "ssha" password. It can be more than 8 characters long.
Chapter 14 System Administration Guide: Naming and Directory Services
Read page 201 which is the pam.conf file pam_ldap setups. I edited my "/etc/pam.conf" file to reflect this
Chapter 7 Directory Server 5.2 2005Q4 - Administration Guide
Read page 316-318 which has a graphical technique to specify password syntax. I set it up and then tried the password by running "su - brahms". It now requires a longer password than 8 characters and it is set up to use "ssha" for that UID entry "brahms". -
How to use parathesis for OR and AND OPERATOR...
oracle 10g
Hi
Guys please help how to use parathesis for this below query its giving same output values for all my similar queries
select count(balance) from balanace_tb
where kk_code in(111,112,113)
or
kk_code in(111,1124,115,116) and sec_id in(50,51,52,53)
or
kk_code in(100,164,215,161) and sec_id in(53,51,52,59)
or
kk_code not in(100,164,215,162,134) and sec_id in(53,51,52,59)
or
kk_code in(100,164,215,16) and sec_id in(53,51,52,59)
and
open_date=20130331I assume you're looking for something like this?
select count(balance) from balanace_tb
where ( kk_code in(111,112,113)
or (kk_code in(111,1124,115,116) and sec_id in(50,51,52,53))
or (kk_code in(100,164,215,161) and sec_id in(53,51,52,59))
or (kk_code not in(100,164,215,162,134) and sec_id in(53,51,52,59))
or (kk_code in(100,164,215,16) and sec_id in(53,51,52,59))
and open_date=20130331
If not, please post some example data, the expected output from that data, and the logic you are expecting to use, as well as posting your database version.
Re: 2. How do I ask a question on the forums? -
Why using workarea for internal table is better in performance
Please tell me
why using workarea for internal table is better in performanceHi Vineet ,
Why would we choose to use an internal table without a header line when it is easier to code one with a header line?
it has following reason.
1)Separate Internal Table Work Area:
The work area (staging area) defined for the internal table is not limited to use with just one internal table.
take ex-
Suppose you want two internal tables for EMPLOYEE one to contain all records and one to contain only those records where country = USA. You could create both of these internal tables without header lines and use only one work area to load data into both of them. You would append all records from the work area into the first internal table. You would conditionally append the USA records from the same work area into the second internal table.
2) Performance Issues: Using an internal table without a header line is more efficient than one with a header line
3) Nested Internal Tables: If you want to include an internal table within a structure or another internal table, you must use one without a header line.
If this one is helpful ,then rewards me
Regards
Shambhu
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