The OP is looking at a query like the following and asking about which column groups might help the optimizer get the best plan:. Assuming there are no reasons to stop a particular column group from workingwe can look at the join from table A to table B: This means that one end of the join may have a selectivity that is hugely reduced because the column group has quantified the correlation, but the selectivity bin weevils bin bot maker codes for doubledown casino codes the other end is simply based on the two separate selectivities from a.
This is where a collateral point appears — there is bin weevils bin bot maker codes for doubledown casino codes opportunity for transitive closure that the human eye can see but the optimizer is not coded to manipulate. We have two predicates: Both left hand sides reference table C, both right hand sides reference table B — so if we now create a column group on c id, id2 and an additional column group on b id, id2 then we may give Oracle some better information about this join as well.
In fact, even if we create NO column groups at all this specific change may be enough to result in a change in the selectivity calculations with a subsequent change in cardinality estimate and execution plan. In this blog we are going to see how we can install and configure efm in a standby environment. We bin weevils bin bot maker codes for doubledown casino codes that the standby is already confugured and is running.
We also have not configured any VIP. I just use 3 virtual machines to test. Below the configuration we are using 3 servers with Oracle Linux 7. Note that you will need an Edb account. We will show the installation on only one node, but is the same for both nodes. The configuration of efm consists of editing 2 main configuration files: There are already two sample files that we can copy and then edit. First we need to encrypt the password of user efm and after we have to configure efm. Below we show the contents of our two configuration files On pgserver1 which is the primary efm.
I started on following order: Services can be configured to be started automatically when the server starts. Below an example on pgserverools.
The purpose of the witness is to do an automatic failover when the primary is down. In the alert log in our standby server pgserver1, we can see that that the database is converted to a primary one a few time after.
On the old primary pgserver2 we can see the contents of the file recovery. To rebuild our standby database we have to edit the recovery.
Note that a virtual IP can be also configured. The official documentation can help. Skip to main content. Aggregator [ latest ] [ categories ] List of Bloggers List of Blog Aggregators Please use the contact form to include your blog here, suggest a feed, or give feedback.
If your blog is aggregated on OraFAQ, you may want to display this image on your blog: Follow us on Twitter Aggregator feed: You are here Home. I am looking for a function to MD5 values for concatenated columns in the table. The intention is to use this column f Hi, I am working on 12cR1 version installed on my windows 8. Trying to learn EBR and bin weevils bin bot maker codes for doubledown casino codes want to create additional services so that I can connect to two different editions if required.
Using below command, but getting error. Oracale procedure execution is giving an error Tom Kyte - Thu, I have a stored procedure in oracle. Whenever i try to execute it its throwing me an error mentioned below: Error starting at line 5 in command: Line numbers in error messages do not match source lines Tom Kyte - Thu, Subscript beyond count ORA Rman backup Tom Kyte - Thu, I have a database - about 6.
There are basically three tablespaces other than the normal. One of the tables there has two blob columns - each in it's own tablesapce.
We share our skills to maximize your revenue! This MOOC has already run previously, but if you didn't have time to finish or didn't get a chance to participate previously, Column Groups Jonathan Lewis - Thu, The OP is looking at a query like the following and asking about which column groups might help the optimizer get the best plan: It has always been possible in Application Deisnger to specify upon which databases platforms each index should be built.
This is really a feature that is used by PeopleSoft development, rather than customers to deliver indexes that are more appropriate for a particular platform due to differences in the optimizer. Of course, this is a purely cosmetic problem, but one that can cause confusion in Application Designer. The first query reports on the indexes where the supported platform flags all have the same value and one of the unsupported platform flags are different.
Note that if you're using an auto-extensible Undo tablespace configuration, running the single block physical write tests might increase the size of your Undo tablespace - you have been warned. So far I've not tested this, so it might not work out as just described.
Usage Please note - the scripts are freely available and come with no warranty at all - so please use at your own risk. ZIP which contains all required scripts, and should simply be extracted into some directory. The benchmark scripts consist of four similar sets: Single block writes - optionally mixed with synchronous single block reads depends on object vs.
Multi block direct writes Each set consists of three scripts - an interactive guided script prompting for inputs used as parameters for the actual benchmark harness that in turn will launch another "slave" script as many times as desired to run the concurrent benchmark code.
There are in principle two different ways how the scripts can be used: It will drop and re-create a schema to be used for the benchmark and grant the minimum privileges required to create the bin weevils bin bot maker codes for doubledown casino codes and run the benchmark.
At the end of this interactive script it will connect as the user just created and run the benchmark. You can also use this script to clean-up afterwards, which is dropping the user created and stopping the script at that point. Each set of scripts consists of a third script which is the "slave" script being called as many times concurrently as specified to perform the actual benchmark activity. The scripts will generate objects, typically as part of the preparation steps before the actual concurrent benchmark activity starts, or in case of the multi block write test, the object creation is the actual benchmark activity.
Note that in Finally the benchmark script will clean up and drop the objects created for the benchmark. In principle the benchmark scripts should cope with all kinds of configurations: It might run on lower versions, too, but not tested, and of course 18c But since this is 1. Feedback and ideas how to improve are welcome. The "harness" scripts provide a suitable query in the script header to display the latency histogram information nicely.
EDB Failover Manager 3. EnterpriseDB Failover Manager efm So we also have installed openjdk 1. Please enter the password and hit enter: Please enter the password again to confirm: The encrypted password is: The list should include at least the membership coordinator's address.
Below bin weevils bin bot maker codes for doubledown casino codes example on pgserverools [root pgservertools efm It is safe to promote. Proceeding with promotion and will reconfigure original master. Run the 'cluster-status' command for information about the new cluster state. And if we run the cluster-status command during the switchover [root pgservertools efm Idle Node Status idle nodes ignored in XLog location comparisons: Address XLog Loc Info And we can see the promoting phase [root pgservertools efm And after a few time we can see that the new master is on pgserver2 [root pgservertools efm Connection refused Is the server running on host " Find the last time for consecutive rows by status Tom Kyte - Wed, Hello, I need some help with an Oracle Sql Query.
The main problem that i have it's that bin weevils bin bot maker codes for doubledown casino codes input data is variabl Tom Kyte - Wed, Hi Tom, I want to add space between number and a letter in a column.
I'm using a code similar to the following: So the following SQL commands correct all indexes.
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