SQL Server: Fix – Msg 1204, Level 19, State 4 – The instance of the SQL Server Database Engine cannot obtain a LOCK resource at this time…

This is an error that does not happen often. In fact, I came across this for the first time when one of my co-workers Inken HOEIJMANS asked me about this. With her permission, I am reproducing her code solution here. Thank you Inken! She was trying to run a MERGE statement using a large source … Continue reading SQL Server: Fix – Msg 1204, Level 19, State 4 – The instance of the SQL Server Database Engine cannot obtain a LOCK resource at this time…

SQL Server: Fix: Transaction (Process ID) was deadlocked on lock | communication buffer resources with another process and has been chosen as the deadlock victim. Rerun the transaction

I have a nightly SQL Agent job that aggregates backup information from system views to power a Power BI dashboard that the DBA's review periodically for database backup failures. It is actually a PowerShell job that runs every night in parallel to collect the data from hundreds of instances (both SQL Server and Oracle). As … Continue reading SQL Server: Fix: Transaction (Process ID) was deadlocked on lock | communication buffer resources with another process and has been chosen as the deadlock victim. Rerun the transaction

Eating An Elephant – How To Work With Huge Datasets In Oracle And SQL Server

Simplifying complex problems is difficult but when done, the rewards are definitely worth it. How I single-handedly managed to migrate 55 Billion rows in 4000+ tables: Last year, I created PowerPump a PowerShell based data copy server which continuously migrated 4000+ Oracle tables to SQL Server. It was no simple task given that I had … Continue reading Eating An Elephant – How To Work With Huge Datasets In Oracle And SQL Server

Oracle – Why Is Toad Asking Me To Commit/Rollback A SELECT With No Transaction?

Commit or rollback a SELECT, really? Occasionally, you would be working with your favorite Oracle tool and when you are ready to close the tool, it will prompt you to either commit or rollback your work. “What work?”, you wonder. The problem is, you have only done SELECT’s. Why is it prompting you to commit … Continue reading Oracle – Why Is Toad Asking Me To Commit/Rollback A SELECT With No Transaction?

Oracle – Is my APPEND Hint Being Ignored? How To Find Out?

Why is the APPEND hint so great? In a prior post, we extolled the virtues of the APPEND hint (AKA Direct Path Insert). It is a great option to use • UNDO usage is negligible. It is only generated for index maintenance and meta data changes. The keyword is index maintenance – indexes generate UNDO. … Continue reading Oracle – Is my APPEND Hint Being Ignored? How To Find Out?