I recently wanted to work on Metric Extensions automation, and realized the task was a bit more complicated than I thought. My original idea was to look into the emcli verb list, but I was unlucky. In fact, emcli does not allow you to retrieve information about Metric Extensions. I had to dig further, looking into the Enterprise Manager SYSMAN…
Documentum is a powerful but also complex software. Therefore, debugging performance issues often comes down to being able to implement and review various traces. In this blog, I will talk about how you can detect and analyze slow SQL queries from a Documentum Server. Several years ago, I wrote a blog post about DFC traces. It included the setup and…
In a Documentum upgrade project from 20.x to 23.4 earlier this year, I faced an issue which prevented the installation/upgrade of D2. The problem was located inside the D2-DAR while it was trying to update the workflow trackers, which failed because of an ORA-01427 error. The exact error displayed was this one: Before that happened, I successfully upgraded 7 or…
Azure Database watcher is a managed monitoring service designed to provide insights and diagnostics for Azure databases and Azure Managed Instance. It helps database administrators and developers track performance, detect anomalies and troubleshoot issues efficiently. By collecting telemetry data, logs and metrics, Azure Database watcher enables proactive monitoring and alerting, ensuring database health and optimal performance. Moreover, Database watcher is…
In this blog I want to introduce some of the new features of the Oracle 23c developer edition. It will be only a selection of some of the main features. It is not the intention to give you a thorough picture of all the features in this blog. I have tested some of the essential ones (in my opinion) on…
For a customer, I had to check if partitioning improves performance of massive and concurrent inserts. The goal is to execute several Inserts in parallel via dbms_parallel_execute package (my previous blog “parallelize your Oracle Insert with DBMS_PARALLEL_EXECUTE” explains how to use dbms_parallel_execute). The idea is to insert more than 20 millions of rows in 2 tables : One table not…
One of the challenge of all PL/SQL developers is to simulate the Production activity in a Non Prod. environment like for example different Insert executed by several sessions. Different tools exist like Oracle RAT (Real Application Testing) but under license or you can create your own PL/SQL package using DBMS_SCHEDULER or DBMS_PARALLEL_EXECUTE packages. The aim of this blog is to…
The DUAL table is automatically created by Oracle and contains one column (DUMMY) and one row (x value). This table is often used by SQL developer in PL/SQL code (Package, Functions, Trigger) to initialize variables storing technical information such as for example SYSDATE, USER or HOSTNAME. Querying DUAL table is generally faster as we can see below: SQL> select sysdate…
By Franck Pachot . I’ve recently looked at Grafana. Pros: it is really nice, I mean aesthetically. If you want to build a dashboard for your boss, or put it on a large screen in the open space, that’s beautiful. Cons: not mature. I’m working for years with technology that works. When I have a problem, I find the solution…
By Franck Pachot . Looking at database performance has always been necessary to optimize the response time or throughput, but when it comes to public cloud where you are charged by resource usage, performance tuning is critical for cost optimization. When looking at host metrics, you see only the symptoms and blindly guess at some solutions: add more vCPU if…
By Franck Pachot . I have posted, a long time ago, about Google Spanner (inserting data and no decimal numeric data types) but many things have changed in this area. There is now a NUMERIC data type and many things have improved in this distributed SQL database, improving a bit the SQL compatibility. gcloud I can use the Cloud Shell,…
By Franck Pachot . In the previous post I described the PartiSQL SELECT for DynamoDB and mentioned that a SELECT without a WHERE clause on the partition key may result in a Scan, but the result is automatically paginated. This pagination, and the cost of a Scan, is something that may not be very clear from the documentation and I’ll…
