Oracle

Oracle 20c : The new PREPARE DATABASE FOR DATA GUARD

By Mouhamadou Diaw As you may know, Oracle 20c is in the cloud with new features. The one I have tested is the PREPARE DATABASE FOR DATA GUARD. This command configures a database for use as a primary database(…)

SQLNET.EXPIRE_TIME and ENABLE=BROKEN

By Franck Pachot . Those parameters, SQLNET.EXPIRE_TIME in sqlnet.ora and ENABLE=BROKEN in a connection description exist for a long time but may have changed in behavior. They are both related to detecting dead TCP connections with keep-alive probes. The former(…)

odacli create-database extremely slow on ODA X8-2 with 19.5

Introduction ODA X8-2, in the S, M or HA flavour, is the new database appliance from Oracle. But as a brand new product, you can experience troubles due to the lack of maturity. This time, it concerns database creation that(…)

How SQL Server MVCC compares to Oracle and PostgreSQL

By Franck Pachot . Microsoft SQL Server has implemented MVCC in 2005, which has been proven to be the best approach for transaction isolation (the I in ACID) in OLTP. But are you sure that writers do not block readers(…)

Running SQL Server on the Oracle Free tier

By Franck Pachot The Oracle Cloud is not only for Oracle Database. You can create a VM running Oracle Linux with full root access to it, even in the free tier: a free VM that will be always up, never(…)

NVMe the afterburner for your database

Over 1 million IOPS (@8 KByte) and more than 26 GByte/s (@1MByte): Read more to see all impressive benchmark figures from a server with 14 NVMe drives and read why this is still not the best you could get...

Should I go for ODA 19.5 or should I wait until 19.6?

Introduction As you may know, Oracle Database 19c is available for new (X8-2) or older Oracle Database Appliances since several weeks. Current version is 19.5. But when you go to the official ODA documentation , it(…)

ROLLBACK TO SAVEPOINT;

By Franck Pachot . I love databases and, rather than trying to compare and rank them, I like to understand their difference. Sometimes, you make a mistake and encounter an error. Let's take the following example: create table DEMO (n(…)

Make Oracle database simple again!

Introduction Let’s have a look at how to make Oracle database as simple as it was before. Oracle database is a great piece of software, yes it’s quite expensive, but it’s still the reference and most of the companies can(…)

Dbvisit 9: Adding datafiles and or tempfiles

By Mouhamadou Diaw One question I was asking is if the standby_file_management parameter is relevant in a Dbvisit environment with Oracle Standard Edition. I did some tests and I show here what I did. We suppose that the Dbvisit(…)