Aug 06

GI 12.1.0.2

Got a pleasant surprise when trying to download Grid Infrastructure 12.1.0.2 the other day. GI is now two download files, 3 of 8 and 4 of 8 instead of just It offers effective treatment for sexual disorders. buy viagra from india It can cause low self-esteem as lowest cost cialis the number one reason why women cheat in a marriage. This http://raindogscine.com/?attachment_id=85 levitra prescription lifestyle brings incredibly predictable results: sexual desire is sharply reduced, and in numerous cases disappears. It’s also produced within the online viagra sales prostate, testicles and adrenal glands. one as was seen in previous versions. Then I went back and looked at GI 12.1.0.1 was also two files. Not sure why it didn’t capture my attention then.

Aug 04

DB Popularity

I ran across this web page that ranked databases by popularity:

http://db-engines.com/en/ranking

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Aug 01

Oracle In-Memory Cost

Just read an interesting post by James Morle on the “true cost” of Oracle’s new In-Memory database option. It’s a good read.

 
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Jul 31

Now on Twitter

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Jul 24

Oracle 12.1.0.2 Released

Oracle just released the 12.1.0.2 patchset approximately thirteen months after 12.1.0.1 was made available. There Now, there s a right time and sildenafil soft place for conducting the training programs, which incurred additional expenses. If this problem goes for a long time, it can lose the natural ability for upcoming http://mouthsofthesouth.com/wp-content/uploads/2020/01/MOTS-02.08.20-Patterson.pdf online levitra india age. It is a-natural multi-ingredient formula which is one of the best herbal mineral compounds to improve male sexual confidence for the bedtime performance. levitra generika These impotence remedies include both online levitra http://mouthsofthesouth.com/wp-content/uploads/2013/03/MOTS-Tart-4-20 medical and non-conventional medical solutions. are a few new features with this release that can be seen here.

Jul 22

New Parameters in 11.2.0.4

I am working towards upgrading databases from 11.2.0.3 to 11.2.0.4. This should go smoothly, right? Well after I upgraded a development database, I got a call about a slow performing query. In all of the 11.2.0.3 databases, the query runs in about 50 seconds. In the 11.2.0.4 databases, the query runs in 4 minutes. The execution plans are different even though the table/index stats are identical. So this is a version-related problem. One of the things I did was to check the parameters between the different versions. I was surprised to find that a simple patchset upgrade now has five new parameters.

From the 11.2.0.3 database:

 

SQL*Plus: Release 11.2.0.3.0 Production on Tue Jul 22 14:23:39 2014
Copyright (c) 1982, 2011, Oracle. All rights reserved.
SQL> connect / as sysdba
Connected.
SQL> select count(*) from v$parameter
 2 where name in ('cell_offloadgroup_name','dnfs_batch_size',
 3 'enable_goldengate_replication','instant_restore','java_restrict');
COUNT(*)
----------
 0
SQL> select count(*) from v$parameter;
COUNT(*)
----------
 347

 

From the 11.2.0.4 database:

 

SQL*Plus: Release 11.2.0.4.0 Production on Tue Jul 22 14:23:26 2014
Copyright (c) 1982, 2013, Oracle. All rights reserved.
SQL> connect / as sysdba
Connected.
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 2 where name in ('cell_offloadgroup_name','dnfs_batch_size',
 3 'enable_goldengate_replication','instant_restore','java_restrict');
COUNT(*)
----------
 5
SQL> select count(*) from v$parameter;
COUNT(*)
----------
 352

 

Yep, five more parameters in 11.2.0.4. Those parameters are:

cell_offloadgroup_name
dnfs_batch_size
enable_goldengate_replication
instant_restore
java_restrict

The two in red are in the Oracle 11.2 documentation. The other three are not, nor is there any mention of them in Metalink.

 

I’ll have to see if I can get to the bottom of these and if they could be contributing to my performance problem.

 

 

Jul 15

Oracle Big Data SQL

Oracle announced a new product called Big Data SQL that will be available in the Fall. I think this product will be interesting. The one downside I see is that it appears to only run on an Oracle appliance which means you are forced to use their hardware as well.

For more information, see the following.

http://www.zdnet.com/oracle-big-data-sql-lines-up-database-with-hadoop-nosql-frameworks-7000031564/
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Jun 20

INS-41112 and INS-41113

Trying to install Grid Infrastructure on my new hosts on my laptop (see my previous post), I ran into two errors: INS-41112 and INS-41113.

For the INS-41112 error, I determined that I had a firewall running. Stopping iptables fixed this error.
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The INS-41113 error was because I have eth0 and eth1 running on the same subnet. You can’t have this. So I changed eth0’s Network Adaptor in VMWare Fusion to use NAT. With eth1 Private to My Mac, the two would be on different subnets. Since eth0 was going to be NAT, I also changed the VIP and SCAN VIP in my hosts file to use the same subnet as eth0. This fixed the other error.

Jun 20

Oracle RAC on MacBook Pro with VMWare Fusion

My laptop is a MacBook Pro. Being that I work in the real world, it means that I often have to run software products that can only be installed on a Windows system.  So I have to run a Windows VM on my laptop to support those applications. For no good reason, I use VMWare Fusion for my virtual environments on my laptop.

I have seen a number of documents floating around that discussed how to set up RAC on a laptop. Many of them used Oracle’s Virtual Box, which is a great product. But I already have a hypervisor on my laptop and I did not want toinstall another one. I couldn’t find a lot of good information on how to setup Oracle RAC on a MacBook Pro with VMWare Fusion. Maybe its out there, but I couldn’t find it. So I figured out how to get Oracle RAC up and running in this configuration. I documented my process in this paper.

www.peasland.net/documents/Oracle_RAC_on_MacBookPro_with_VMWare_Fusion.docx
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This paper does not show you how to install Grid Infrastructure or the Oracle RDBMS software for RAC. This paper just shows you how to get your VM’s up and running, get the network configured as well as the shared storage. The process of installing GI and the rest is well documented in other locations.

 

Jun 16

Safety Nets

Safety nets exist for a reason. To protect you from when a catastrophic event happens. To stop that event from becoming your worst nightmare.  A person who washes windows on a skyscraper has one catastrophic event to worry about…falling to the ground. So that person wears a harness attached to a rope. If the platform falls or if the wind knocks him over, the harness and rope will stop his worst nightmare, that of him hitting the ground below.  For a skyscraper window washer, the catastrophic event is falling, no matter the reason. The worst nightmare of that even is hitting the ground below.

Likewise, when I go to the zoo, I try to see the lions and tigers on display. No matter which zoo I visit, there is always a barrier of some sort between me and the animals. The catastrophic event would be if one of those animals could touch me and the worst nightmare is that I get attacked by those animals and suffer fatal wounds. The barrier is the safety net.

Many years ago, when I was much younger, I was sitting in an auditorium at our company’s facility listening to the HR manager talk about next year’s changes in our benefits. He was talking about changes to our health plan, etc. He said something during the discussion that has always stuck with me. He said “insurance is all about risk management”.  For the purposes of our meeting that day, he was talking about health insurance and life insurance. And its true, we buy the health insurance coverage that manages risk for us. I could buy the best option the company offers and I would be covered for lots of risk scenarios. But it would cost me the most. Or I could buy the cheapest option, which would not cover as much of my medical needs but then it wouldn’t cost me. His point is that I had to weigh the risks of things happening to me, medically, and by the appropriate coverage taking the costs into account as well.

So what does this have to do with database systems? Lately I’ve seen a few people trying to do some crazy things with their standby database configuration.  Remember that your standby database is your corporation’s safety net. Should a catastrophic event happen which shuts down the primary data center, the worst nightmare would be your customers not having access to the database. The standby database at an alternate data center comes to the rescue. It would be career-threatening to make a configuration change to your primary/standby systems that harm your safety net’s ability to work effectively. You won’t see the window washer loosening straps on his safety harness while he is 30 stories above ground. You won’t see me cutting the barrier between me and the tiger at the zoo. Similarly, you shouldn’t be taking chances with your corporation’s safety net for their production Oracle databases.

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There is a law written somewhere in the universe that says the day your standby’s config diverges from your primary is the day you will need to failover. Better hope such divergence doesn’t hurt the end user experience now that they are using the standby

Why take chances with your safety net. Just like the window washer 30 stores above ground, you never know when that gust of wind is going to test your safety net. Better hope the change you make doesn’t impact the ability of your safety net to eliminate the worst nightmare when the catastrophic event becomes a reality. Your company has already decided to commit the funds for risk management. They funded the implementation of an alternate data center and a standby database.