Últimos artigos
An OS process and DB session which won’t die: a systematic troubleshooting approach
This week, I lent a hand to a friend who had a session stuck in the database. By the time he got in touch, he’d already terminated the session in both the database and the Operating System. He mentioned that neither the database session nor the OS process had actually died. The database session was[…]
New exa-vm-rpt.sh for Virtualized Exadata environments
Hi folks, It’s been a while I’m only working and not publishing much content. Late 2024 and beginning for 2025 I started posting some videos in my YouTube channel, but even that came to a hiatus due to family and work demands. Today I’m releasing a new script that is based on Fred Denis’ exa-racklayout.sh[…]
Alternatives to Telnet for Testing Open Ports
In the world of networking, testing the availability and responsiveness of open ports is a crucial task. Traditionally, Telnet has been a go-to tool for such purposes, allowing users to connect to remote devices or servers. However, there are situations where Telnet might not be available or suitable for use. In those cases, several alternatives[…]
Script to calculate Average CPU Load from SAR
Just a simple script here to calculate average CPU load from SAR data: Execute it and you’ll see an output like this:
Exadata Cloud at Customer VM Cluster update failed using the OCI console: how to troubleshoot and resolve it
Hi people, It’s been 3 weeks since I updated the OS of the VMs of one of our client’s Exadata Cloud at Customer (ExaCC) in their DR site. The update was performed from Exadata image 19.2.x to 22.1.10.230422 using the OCI console without any issues. There was a huge leap in the image version because[…]
Oracle Autonomous Data Warehouse vs Snowflake Data Cloud: A brief overview
Introduction In today’s data-driven world, businesses need robust and scalable data warehousing solutions to stay ahead of the competition. Two key players in this domain are Oracle Autonomous Data Warehouse (ADW) and Snowflake Data Cloud. Both platforms offer unique features and capabilities for businesses looking to leverage the power of their data. In this blog[…]
Rolling forward an Oracle standby database in a DataGuard configuration with RMAN “recover from service”
Setup for this case: Two Gen2 Exadata Cloud At Customer X8 quarter rack (2 dbnodes + 3 cells): One ExaCC in NYC being the primary PRODDB is the primary RAC database running in 2 nodes in the NYC cluster. One ExaCC in SLC being the standby PRODDBB is the standby RAC database running in 2[…]
Sequences não garantem valores sequenciais no Oracle Database
Olá pessoal, hoje trago um conteúdo bastante fundamental e simples, mas que por muitas vezes é esquecido. Vez ou outra preciso discutir com desenvolvedores sobre a geração de valores sequenciais para os registros de uma tabela. Essa é uma discussão um tanto quanto cansativa, pois os desenvolvedores muitas das vezes optam por gerar esse número[…]
Ensuring Reliable Database Backups with Oracle Zero Data Loss Recovery Appliance
Organizations rely on their databases to store critical business data, making it essential to have a reliable backup solution in place. However, as databases grow larger and more complex, ensuring the recoverability of data becomes increasingly challenging. In this blog post, we’ll explore how large corporations overcame these challenges by implementing Oracle Zero Data Loss[…]
OGB Appreciation Day: Exadata Smart Scan
Hello folks, Let’s see how Smart Scan works. It has been a while I don’t write anything in the blog, but is always good to come back here and also participate on the OGB Appreciation Day, organized every year by Tim Hall from the Oracle Base. This year I decided to quickly write about Exadata[…]