Category Archives: IT Operational Excellence

Scaling your apache to handle more requests

Intro I was running an apache instance very happily with mostly default options until the day came that I noticed it was taking seconds to serve a simple web page – one that it used to serve in 50 ms … Continue reading

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Screaming Streaming on the Raspberry Pi

Intro The Raspberry Pi plus camera is just irresistible fun. But I had a strong motivation to get it to work the way I wanted it to as well: a First robotics team that was planning on using it for … Continue reading

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The IT Detective Agency: since when can a powered off PC do dynamic DNS updates?

Intro The IT Detectives are back after a short lull during which no great mysteries needed expert resolution – you knew that situation couldn’t last too long. The following tale was relayed to me, I unfortunately cannot claim to have … Continue reading

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The IT Detective Agency: Roku player can’t connect to Internet

Intro I bought a used Roku player, just to try it out. Things didn’t go right at first. The details Setting it up, I got to the point where it tests its Internet connection. There are three status lights. The … Continue reading

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The IT Detective Agency: the case of the Sales and Use tax software

Intro I have to give credit to my colleague “Ben” for cracking this case, which left me scratching my head. Users at drjohns were getting new Windows 7 PCs and some of the old software wasn’t going to run on … Continue reading

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The IT Detective Agency: the case of the Adobe form network issue

Intro Sometimes IT is called in to fix things we know little or nothing about. We may fix it, still not know anything, except what we did to fix it, and move on. Such is the case here with a … Continue reading

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The IT Detective Agency: intermittent web page not found error

Intro One of the high arts of IT is system integration, and an important off-shoot of this is acquisitions. We are involved in integrating a new location, which, unfortunately, we do not yet have full access to. The local networking … Continue reading

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The IT Detective Agency: SAP Afaria communication to APNS failed

Intro IT is often called in and expected to produce results when only vague or partial information is presented. This is especially so when integrating commercial software. The Issue We were looking to implement SAP SUP (Sybase Unwired Platform). Part … Continue reading

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The IT Detective Agency: Cognos stopped working

Intro Here’s another in our continuing exciting IT drama. A user reports that her Cognos app stopped working. She’s in charge of the Cognos application servers, I run the Cognos gateway on a Linux server. I have almost no working … Continue reading

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The IT Detective Agency: the case of the messages from mars

Intro Today we got a “funny” message on our SLES 11 server in the /var/log/warn file. You might think that Martians have landed! The Details Specifically this: Nov 9 10:54:19 drjohn24 kernel: [72397.088297] martian source 10.120.2.24 from 10.0.0.3, on dev … Continue reading

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