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That's OS caching, not MySQL. In general, a "cache" is designed to release the space when someone needs it. So having lots of space consumed by a cache is not the same as "running out of RAM". Specifically, MySQL seems to be using a meager 1GB of the 8GB. See Wilson's requests for more on what we can point at to say that you are not in ...


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Your htop screenshot is very difficult to read. Unfortunately, capturing text does not help as the colors are significant. See also: What exactly do the colors in htop status bars mean? For the benefit of the less-sighted: the Mem line is 12 lines of green used, 1 of blue buffers, and 70 of yellow/orange cache. 950M used of 7.6GB. No swap. This use of all ...


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