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>Since these tunables are not dynamically adjustable, we manually patched the running process to avoid sleeping in this case.

Holy crap. You wrote a jump into an active process' memory space?

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While I have hot-patched program text on production machines many times in my career, in this case it was a bit simpler in that we were dynamically changing the value of a variable. The effect was instant; our chat logs from the time captured our visceral reaction to the resulting performance improvement.[1]

[1] https://twitter.com/bcantrill/status/628320729898045440

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