Database Administration & Monitoring

The Option -applyRU of runInstaller

By Mouhamadou Diaw RU, MRP should be applied to database home as soon as possible. Usually we often nstall the base version and after install the RU on top on the base version For example(…)

Oracle 21c Gradual Password Rollover : Tracking old password usage

By Mouhamadou Diaw In a previous blog, I talked about the new feature in Oracle 21c, which allows an old and new password to be valid during a period of time. This(…)

TimescaleDB

Introduction TimescaleDB is a “time-series” database (TSDB). This kind of databases are optimized for storing, manipulating and querying time-series data. But… what is time-series data ?Time-series data is a collection of metrics (regular) or measurements(…)

Migrating Non-CDB to Multitenant

By Mouhamadou Diaw Dealing these last days to database migration with a customer, I write this blog to describe the main tasks The context is to migrate databases to a new infrastructure. Below the configuration(…)

PostgreSQL 16: More I/O statistics

PostgreSQL is already tracking various kinds of statistics which can help in identifying bottlenecks. Some of these statistics are available in the the pg_statio_* catalog views: postgres=# select viewname from pg_views where viewname like '%statio%'; viewname -------------------------- pg_statio_all_sequences pg_statio_all_tables(…)

Migration with Data Guard: Oracle on Windows AWS to Oracle Cloud Infrastructure (OCI)

Oracle offers a number of methods to migrate Oracle databases to the Oracle Cloud Infrastructure (OCI). From Data Pump through RMAN, Data Guard and even Golden Gate there should be a solution for just about everyone. However, most of(…)

Upgrade OEM 13c from R4 to R5

By Mouhamadou Diaw Upgrading Enterprise Manger Cloud Control can be tricky. In this blog I am describing an upgrade I did for a client. The source version is OEM13c R4 And the target version(…)

How to submit a talk for a conference

I already did some talks at conferences and I had already the honor to select talks for a conference. During this talk selection I found some excellent examples on how to do to a proposal, but unfortunately also some(…)

SQL Server: Heap page deallocation and IndexOptimize

Introduction HEAP tables are a type of data structure that, unlike a clustered index table, does not have a specific ordering of its rows, making them faster to insert and delete data. They are often used for temporary(…)

PostgreSQL 16: reserved_connections

The maximum number of connections that PostgreSQL will allow, is controlled by the max_connections parameter. By default this allows a maximum of one hundred connections: postgres=# show max_connections; max_connections ----------------- 100 (1 row) In reality not one(…)