Originally Posted by Psychophan7
I don't think maintenance means cleaning and such. It could, but I don't think that's all it's for. Besides, even a hasty cleaning job might break something. Uh oh, you nudged that processor and broke 4 pins when you were cleaning the dust off of it!
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Maintenance usually means restarting the servers to flush out the memory cache and give the systems some cooling time since they are usually stacked in a room set to about 58-64 F. Heat dissipates into other servers, and over time even the cold environment doesn't help the systems from overheating.
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When the temperature of the conductor increases, the collisions between electrons and ions increase. Thus as a substance heats up because of electricity flowing through it (or by any heating process), the resistance will usually increase.
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Resistance over a transistor (the funky little object that makes all computers work, FYI), will ultimately result in defects across the hardware, usually resulting in crashes.