41–50 of 84 posts
The link redirects to the blog frontpage for me, but https://media.netflix.com/en/tech-blog/linux-performance-ana... works.
Hmm, that java process has 0.227 TB of mapped virtual memory and 3090% CPU..
You sound like you doubt the readings. This is netflix, I assume they have some pretty hefty kit backing up their service. For a massive server the CPU reading might not be unusual. Maybe it has 32+ CPU cores and a multi-threaded java app is spinning most of them. Also remember that on a heavily loaded system the task that is reading CPU use is itself competeing for time. Timing issues and other monitoring vagueries…
For a massive server the CPU reading might not be unusual. Maybe it has
32+ CPU cores and a multi-threaded java app is spinning most of them.
The %CPU column is the total across all CPUs;
1591% shows that that java processes is consuming almost 16 CPUs.The link redirects to the blog frontpage for me, but https://media.netflix.com/en/tech-blog/linux-performance-ana... works.
Odd, that URL messes up the pre tags when I load it in Chrome or Firefox (desktop). http://techblog.netflix.com/2015/11/linux-performance-analys... looks right.
edit: old version is (PDF) http://www.brendangregg.com/Articles/Netflix_Linux_Perf_Anal...
Just curious though, anyone know of a similar type of writeup or post regarding windows?
I have an MSSQL box I want to kill with fire - but I would like to be able to measure its perf with as much insight as I might on a comparable linux box.
What is the best way to measure disk IO perf on a windows box, specifically?
Anybody got a different source? Apparently I'm not allowed to watch netflix at work (or view their blog).
Here is another quick performance view. Install atop a better top replacement and watch for anything showing up in red colors.
I'd love to be able to identify the root cause of the instance locking up. It seems like this article is more about the commands you'd run to assess the health of an active/working EC2 instance and not one that you're unable to SSH into. Any idea on how to identify the problem with my EC2 instance?
> Pidstat is a little like top’s per-process summary, but prints a rolling summary instead of clearing the screen. This can be useful for watching patterns over time, and also recording what you saw (copy-n-paste) into a record of your investigation. top has a batch mode: "top -b" will print all processes periodically to the terminal, without starting the curses-style UI, providing the same "rolling summary".