The OpenEdge DBA Files

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Business Continuity

The Cure for Chaos: Is DIY Worth the Time, Effort and Risk?

Now more than ever, the marketplace is flooded with tools that can support, automate, and/or analyze practically any aspect of your application lifecycle. Many of these tools are widely adopted and open source (read: common and free). Does common mean best-of-breed? Is stringing together free (often unsupported) open source solutions a prudent strategy for managing enterprise applications?

Should you DIY?

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New DBA Series: Please Don't CRASH Your Database AGAIN!!

Read on for more soul crushing, database corrupting, career killing ways to CRASH your OpenEdge database!

Linux "Out of Memory Killer"

A Linux self-preservation mechanism, the OoMK terminates a process when memory is over-committed. Unsurprisingly, the OoMK kills the process consuming the most memory, which, most likely, is the database broker process.

A quick Google search will turn up numerous interesting articles on how to avoid this situation, including ways to tune "oom_adj". In practice, though, it is unlikely that your database will be spared and you are better off making sure that you have ample memory to handle the expected workload on your server. 

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User Died, DB Crashed, Business MAD!

Anyone who has been around the OpenEdge world for a while has had to face the dreaded “User died holding shared memory latch. ABNORMAL SHUTDOWN” crash. While this sometimes happens as a result of a Progress OpenEdge bug, more often than not it’s a human error. Here are three key points to understand in order to minimize the chance of crashing your database when trying to terminate a shared memory client.

 

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