March 2007
Intermediate to advanced
326 pages
9h 3m
English
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Diagnostic Tests
The thread dumps on the front-end applications servers revealed a similar pattern across all the DRPs. A few threads were busy making a call to the back end, and most of the others were waiting for an available connection to call the back end. The waiting threads were all blocked on a resource pool, one that had no timeout. If the back end stopped responding, then the threads making the calls would never return, and the ones that were blocked would never get their chance to make their calls. In short, every single request-handling thread, all 3,000 of them, were tied up doing nothing, perfectly explaining our observation of low CPU usage: all 100 DRPs were idle, waiting forever for an answer that would never come.
Figure 33. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.