Parallelism for Live Database Servers.

Hi All
We are palnning to increasing “cost threshold for parallelism – 5 to 35 and maximum degree of parallelism – 4 to 8, If we change the settings, I believe we may face the below mentioned problems:
#1 . Query may take more time than it takes now, in the range of 5- 20 with parallelism until we optimize it. As we know that there are many application running on TDS Live which are accessed by multiple users. This might impact the users as they might have to wait for 35 seconds until it is executed with parallel plan.
#2 . When analysing we found that on LIVE environment there are two instances running parallel, change of the setting - maximum degree of parallelism from 4 to 8 might crash other query instances and vice versa.
We need suggestions from you all to help us know how parallelism will work when there are 2 instances running on the same machine.
Shivraj Patil.

Is it OLTP or OLAP server/application? Generally speaking if it is OLTP server (many small running queries ) you would probably benefit from setting MAXDOP =1 on the server level and increasing cost
threshold for
parallelism to
50 for the beginning...
But Google on the subject, you will find great blogs from Adam Machanic for example....
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
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APR

How to Integrate real time data between 2 database servers

How to Integrate real time data between 2 database servers
May 31, 2006 2:45 AM
I have a scenario where the data base (DB2 400) is maintained by AS 400 application and my new website application based on j2ee platform access the same database also but the performance is very low. So we have thought of introducing new oracle data base which will be accessed by j2ee application and all the data from db 400 database will be replicate to oracle data base. In that scenario the only problem is of real time data exchange between 2 databases. How do we achieve that considering both the application As400 and j2ee website application are running in parallel and accessing the same information lying on DB2 400 database. We have to look at transaction management also.
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Panky
DrClap
Posts:25,835
Registered: 4/30/99 Re: How to Integrate real time data between 2 database servers
May 31, 2006 11:16 AM (reply 1 of 2)
You certainly wouldn't use XML for this.
The process you're looking for is called "replication". Ask your database experts about it.
I predict that after you spend all the money to install Oracle and hire consultants to make it replicate the DB2/400 database, your performance problem will be worse.
panks
Posts:1
Registered: 5/31/06 Re: How to Integrate real time data between 2 database servers
May 31, 2006 11:55 PM (reply 2 of 2)
Yeajh I now that its not a XML solution.
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Is it possible to use MQ products??
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Duplicate post
Read and Follow the Forum Rules

Best Policy to run open queries on LIVE Database

Hi Experts,
There are users who has RO access on Live database , they run open queries on Live database. Sometimes we have faced some issues on Live Database due to open queries and we can not restrict them to run as well. So would like to get your suggestion
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Shivraj Patil.

What issue do you have? One option is tuning the query, means create proper indexes to speed up the query..
But the user may run heavy query even being unaware that system consumes resources, for example
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SELECT
p.ProductId,
p.ProductNumber,
p.ReorderPoint,
th.TransactionId,
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PARTITION BY
p.ProductId
ORDER BY
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ORDER BY
th.Quantity DESC
) AS OrderQtyRank
FROM bigProduct AS p
INNER JOIN bigTransactionHistory AS th ON
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WHERE
p.ProductId BETWEEN 1001 AND 5001
GO
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
Improves MS SQL Database Performance
SQL Server Integration Services:
Business Intelligence

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We are wanting to set up a SQL server to store the data from TestStand.
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Hi,
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ood starting point: http://www.microsoft.com/sql/evaluation/compare/benchmarks.asp
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To be more specific.
I'd choose a modern Intel-based system like P4-3MHz (that have virtual multiprocessors) with at least 512 MB RAM and a RAID5 hard disk storage system (not nercessarily SCSII) with at least 3 single HDs. Use a 100 MB LAN connection at least, best with a switch. Don't forget backup!
Check also the pages of your preferred database provider.
I am on a starting point here too. We have chosen mySQL, which runs (at least now) on the very same machine where TS & LV are running. We plan to test this setup with increasing burden to get a practical assumption of the HW requirements. The planned final setup will have up to 5 test stations and 5 query stations. We'll run about 50 rather complex tests of about 4 hours each that operate in parallel on the test stations.
HTH and
Greetings from Germany
Uwe

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<opm:field table="TRIP" name="START_TIME" xsi:type="opm:column"/>
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<opm:field table="TRIP" name="EXPIRY_TIME" xsi:type="opm:column"/>
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</toplink:object-persistence>
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<?xml version="1.0" encoding="UTF-8"?>
<toplink:object-persistence version="Oracle TopLink - 10g Release 3 (10.1.3.1.0) (Build 061004)"
xmlns:opm="http://xmlns.oracle.com/ias/xsds/opm" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
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</opm:queries>
<toplink:does-exist-query xsi:type="toplink:does-exist-query">
<toplink:existence-check>check-database</toplink:existence-check>
</toplink:does-exist-query>
<toplink:read-all-query xsi:type="toplink:read-all-query">
<toplink:reference-class>ExpiredTripPoller.Trip</toplink:reference-class>
<toplink:container xsi:type="toplink:list-container-policy">
<toplink:collection-type>java.util.Vector</toplink:collection-type>
</toplink:container>
</toplink:read-all-query>
</opm:querying>
<opm:attribute-mappings>
<opm:attribute-mapping xsi:type="toplink:direct-mapping">
<opm:attribute-name>id</opm:attribute-name>
<opm:field table="TRIP" name="ID" xsi:type="opm:column"/>
<opm:attribute-classification>java.math.BigDecimal</opm:attribute-classification>
</opm:attribute-mapping>
<opm:attribute-mapping xsi:type="toplink:direct-mapping">
<opm:attribute-name>lpn</opm:attribute-name>
<opm:field table="TRIP" name="LPN" xsi:type="opm:column"/>
<opm:attribute-classification>java.lang.String</opm:attribute-classification>
</opm:attribute-mapping>
<opm:attribute-mapping xsi:type="toplink:direct-mapping">
<opm:attribute-name>startTime</opm:attribute-name>
<opm:field table="TRIP" name="START_TIME" xsi:type="opm:column"/>
<opm:attribute-classification>java.sql.Timestamp</opm:attribute-classification>
</opm:attribute-mapping>
<opm:attribute-mapping xsi:type="toplink:direct-mapping">
<opm:attribute-name>expiryTime</opm:attribute-name>
<opm:field table="TRIP" name="EXPIRY_TIME" xsi:type="opm:column"/>
<opm:attribute-classification>java.sql.Timestamp</opm:attribute-classification>
</opm:attribute-mapping>
<opm:attribute-mapping xsi:type="toplink:direct-mapping">
<opm:attribute-name>status</opm:attribute-name>
<opm:field table="TRIP" name="STATUS" xsi:type="opm:column"/>
<opm:attribute-classification>java.math.BigDecimal</opm:attribute-classification>
</opm:attribute-mapping>
</opm:attribute-mappings>
<toplink:descriptor-type>independent</toplink:descriptor-type>
<toplink:caching>
<toplink:cache-type>weak-reference</toplink:cache-type>
<toplink:always-refresh>true</toplink:always-refresh>
</toplink:caching>
<toplink:remote-caching>
<toplink:cache-type>weak-reference</toplink:cache-type>
</toplink:remote-caching>
<toplink:instantiation/>
<toplink:copying xsi:type="toplink:instantiation-copy-policy"/>
<toplink:change-policy xsi:type="toplink:deferred-detection-change-policy"/>
<toplink:tables>
<toplink:table name="TRIP"/>
</toplink:tables>
</opm:class-mapping-descriptor>
</opm:class-mapping-descriptors>
</toplink:object-persistence>
On deployment, this version of the BPEL process behaved as expected - only modifying the records with EXPIRY_TIME less thatn the literal time specified. (Also, I can't really pass in the time as a parameter as this is a polling model).
Can anyone shed any light on what is happening or suggest how I might go about polling in the desired way?
Cheers

Please take a look at this article which states SYSDATE is not supported in a
where clause.
http://www.oracle.com/technology/pub/articles/bpel_cookbook/qualcomm-bpel.html
Excerpt from the article:
Here are three important things you should do in implementing the above design:
Have the status of the record being processed stored in the database. The status includes the process state, next process attempt time, and processing attempt count.
Create an updatable view that exposes only records that are ready to be processed. A view is needed because the database adapter cannot handle a where clause that compares against SYSDATE.
Design logic that determines if a process instance that has faulted should be retried and when the retry should occur. This information will be updated in the database by use of a stored procedure. This can also be done with an update partner link and additional logic in BPEL.
mahalo,
a iii

Multiple Database Servers Question

Hi,
Please forgive this ignorant question, but can someone tell
me how one would go about using multiple database servers?
Just as there comes a time where one would need more than
one web server and would need to use a load balancing
solution, what happens when one would need more than one
Database Server?
How does one go about implementing that solution?
Is there some way to have two database servers carrying the
same information with some kind of load balancing solution
in front of it(?) or does one place some tables on one
Database
server, and other tables on the other database server?
(I have no clue as to how things would work.)
Thanks in advance,
Joe

Microsoft SQL allows for clustering of SQL databases, so for
instance two servers connected to a fileshare and a virtual address
shared across the two physical boxes. Database connections are made
to the virtual addres which will then be handled by the active
node. Becuase a database is ultimately a file(s) on a disk it can
only be attached to one node at a time so you end up with an
active/inactive cluster.

Current Patch Set for Oracle Database Release 11.2

Hi
I am upgrading oracle 10G to 11GR2 in AIX 5.3 Environment with SAP ECC6 , I have just just installled Oracle 11.2.0.1.0 according to the "Database Upgrade Guide -Upgrade to Oracle Database 11g Release 2 (11.2): UNIX". After database software installation , in upgrade manual in section 3.4.4 it says, you need to install current patch set for oracle database 11g R2 and referencing a SAP note 1431799.
I have just read note 1431799 which says Current Patch Set for Oracle Database Release 11.2 is not generally available for SAP customers until December 2010, also I donu2019t find the note 1522330 as mentioned in 1431799.
Please let me know how I can get current patch set to apply with Oracle 11.2.0.1.0 (Is it in SAP service market place?)
I also want to upgrade my installation to oracle 11.2.0.2, please let me know where I get the patch set to upgrade from 11.2.0.1.0 to 11.2.0.2,
or
I have to live with 11.2.0.1.0 and apply SAP Bundle Patch ( SBP)

Abu Al MAmun,
I understand from your posts that you recently upgraded to 11.2.0.2.
I am having the same difficulty, of finding the current patch set for 11.2. Could you please let me know how you worked around it?
Thanks,
Siri
Hello Everyone,
I did read the post on to how you have to install the current patch set for 11.2.
But honestly, it pretty much flew over my head.
I am trying to upgrade our SAP AIX 64 bit test system from Oracle 10.2.0.4 to 11.2.0.2.
And so far I have downloaded all the required sw for the upgrade, except for the current patch set 11.2.
This is what I have right now:
1) Oracle 11.2 AIX 64 bit upgrade sw - 51038805_part 1 to 51038805_part 7 and 51039800.
2) Database Patches -->Oracle 11.2.0.2 -->
All they have here is
a. Database RDMBS - SAP_112020_201012_AIX.zip and b. SAP_112020_201101_AIX.zip
b. OPatch - OPatch_11201_Generic_v3.zip and mopatch-2_1_6.zip
c. Database Vault - DV - >Generic - p9656644_112020_Generic.zip
If I am not wrong, the Database RDBMS files are nothing but the SAP Bundle Patches that have to be installed after installing the currrent patch set 11.2.0.2 using MOPatch.
But I did not find the currrent patch set 11.2.0.2.
Could someone please explain the process to me in detail? This being my first time , I am finding it a bit hard to catch up with some of the stuff.
Thank You!
Siri

Parallelism for Live Database Servers.

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