Use monotonic clock so postgres timeouts are unaffected by system clock changes #141
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Time.nowis not a reliable way to measure elapsed time. If a system clock adjustment coincides with a lock being held, then the timeout actually used may not be the same astimeout_seconds.The monotonic clock measures elapsed time more accurately. The monotonic time is the time since the computer started up, and it is always moving forward.
This change should only affect postgres advisory locks as mysql does not use this method for its timeout behavior.