Everything our consultants learn while running databases for customers: Oracle, PostgreSQL, SQL Server, MySQL, MariaDB, MongoDB and Delphix. Expect hands-on posts about installation, day-to-day administration, backup and recovery, performance tuning, replication and upgrades.
In a previous blog, I went through the full procedure of renaming a GoldenGate extract from the adminclient. I included all necessary steps to avoid missing transactions. Doing this by hand is completely fine, but if you do it often, or want to remove the risk of a typo on an SCN, I have another solution for you. In this…
Column order does not affect equality seeks in SQL Server. Measured on 5M rows, then proven inside the B-tree pages.
In a previous post, I shared the OGGRestAPI Python client I built for the GoldenGate REST API. Since then, I kept using it on production deployments, fixing it and adding new features along the way. It felt like the right time to stop asking people to copy a .py file into their project, so I published it to PyPI. You…
UUIDv7 places its timestamp first, but SQL Server compares uniqueidentifier
values starting from the last bytes. Measured on 25,000 inserts: no gain over NEWID().
In this blog, I will present the new features introduced with the latest release (2.6.0) of the MongoDB DMK. The DMK is a set of standardized tools that aims at easing the work of DBAs by having dbi’s best practices embedded in common scripts across all the database servers of an organization. dbi services provides the DMK (Database Management Kit)…
Throughout my consulting missions, I have often been asked to rename GoldenGate extracts. While this is not a difficult task, it should still be done correctly to avoid missing transactions. In this blog, I will explain how to rename a GoldenGate extract from the adminclient. If you often rename extracts, or want to remove the risk of a typo on…
Upgrading GoldenGate when the source is DB2 for z/OS is not quite the same exercise as upgrading a GoldenGate installation for Oracle. Most of what I described in my generic blogs about planning a GoldenGate upgrade and migrating from Classic to Microservices Architecture is still valid. However, there is an extra layer to deal with. It has to do with…
SSMA fails with ORA-00904 on Oracle SET UNUSED columns. Fix it with a custom select aliasing NULL, no source DDL required.
In a previous blog, I presented how to set up a distribution path between two GoldenGate deployments both secured with NGINX. The method I used there was purely through the Web UI. But GoldenGate also exposes a full REST API, and everything you can do in the UI can be done through the API as well, which is useful for…
I already covered out-of-place patching from the web UI, but patching tasks should be automated, and clicking through the same screens for every deployment can get repetitive. Let’s do the exact same out-of-place patch of a GoldenGate Microservices Architecture deployment, this time entirely with the REST API. Every step below shows two ways to make the same call: Installing the…
When doing complex operations with GoldenGate, checking for long running transactions is mandatory if you don’t want to miss transactions. Let’s look at two ways of retrieving such information, first with the adminclient, and then with the REST API. When and why should I worry about long running transactions ? In a standard extract life-cycle, you should not be worrying…
During a recent performance review on a SQL Server 2019 instance (AlwaysOn Failover Cluster Instance, bare-metal), one number stood out. This post follows the investigation: from a latency figure in a DMV, down the I/O path to a RAID controller setting nobody had ever chosen. The starting point: one number from a health check The I/O statistics of the instance…
