EC2性能不一致？
我们启动了一个大型64位实例，但性能严重不足。像 ls、less 和 cat 这样的命令会花费非常长的时间，比如 10 秒。顶部显示负载超过 2，而实际上我们的 shell 上没有运行任何东西，至少我们没有运行过任何东西。
当我们启动第二个实例时，性能如预期的那样快。我们想知道其他人是否经历过这种类型的性能差异。这种情况多久发生一次？我们正在探索使用 EC2 作为计算集群，如果这种差异经常发生，将会非常不方便。
We launched a Large 64-bit instance and the performance was severely lacking. Commands like ls, less, and cat would take an absurd amount of time, like 10 seconds. A top revealed that the load was over 2 when in fact nothing was running on our shell, at least nothing that we had run.
When we launched a second instance, the performance was quick as expected. We are wondering if other people have experienced this type of performance variance. How often does this occur? We are exploring using EC2 as a compute cluster and this variance would be quite inconvenient if it happens often.
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是的，我已经经历过几次这样的事情了——至少有两三次。
我们通常会在 AWS 支持论坛上发表帖子，有时甚至会得到回复。我不确定 AWS 对论坛等的监控程度，但我认为除非我们不报告问题，否则它们不会得到修复。
通常的修复方法是终止该实例并启动另一个实例。
Yes, I've experienced this a couple of times - two or three times at least.
We usually open threads on the AWS support forum and sometimes even get a response. I'm not sure how much AWS monitors the forums, etc. but I think that unless we don't report the issues, they don't get fixed.
The usual fix is to terminate the instance and launch another.
我们遇到了这个问题，我不知道它是否与您的问题有关，但我注意到 Mingetty 进程正在消耗大量资源，我所做的是，我在 inittab 中注释掉了一些 tty，重新初始化并加载走了。我知道这听起来很愚蠢，但在新启动的实例中，这种情况发生了好几次。
we had this issues i don't know if it's related to your problem, but what i have noticed was that the mingetty process was consuming allot of resources, what i did was, i commented out a few tty's in inittab, reinitialized and load was gone. I know it sounds dumb, but it happened several times with fresh started instances.