Broken Linux Performance Tools 2016
Broken benchmarks, misleading metrics, and terrible tools. This talk will help you navigate the treacherous waters of Linux performance tools, touring common problems with system tools, metrics, statistics, visualizations, measurement overhead, and benchmarks. You might discover that tools you have been using for years, are in fact, misleading, dangerous, or broken. The speaker, Brendan Gregg, has
Linux Performance Analysis in 60,000 Milliseconds
You log in to a Linux server with a performance issue: what do you check in the first minute? At Netflix we have a massive EC2 Linux cloud, and numerous performance analysis tools to monitor and investigate its performance. These include Atlas for cloud-wide monitoring, and Vector for on-demand instance analysis. While those tools help us solve most issues, we sometimes need to login to an instanc
80+ Linux Monitoring Tools for SysAdmins
This post was originally published on the blog by Server Density, an infrastructure monitoring company that joined StackPath in 2018. It’s hard work monitoring and debugging Linux performance problems, but it’s easier with the right tools at the right time. This is why we decided to make the most comprehensive list of Linux monitoring tools on the Internet. To help you find the right tool, we sepa
How to Debug Anything
Does your code work? Probably not. The libraries you're using probably don't work either. If you're lucky, the OS does, but even then you'll probably find something wrong if you look hard enough. Debugging is the reason that the last 20% of shipping a product usually accounts for 80% of the time. And yet, there are a million blog posts and talks about writing code, but very few about figuring out
HDD負荷の原因となったプロセスを特定する : 電子の密林を開拓する
今回は、(CloudWatchではなくて) ふつーの Linux 的な方法で 負荷原因となっているプロセスを特定するための方法について調べます。 ・前提 複数のプログラムが動作している状況で、いずれかのプログラムがHDDを高頻度に利用し、サーバ負荷を高めている。この負荷原因となっているプログラムとプロセスを特定したい。 ここでは、「負荷試験用にEC2ラージインスタンスを用意し、sysbench を使ってソコソコ以上の HDD 負荷を発生させる」という状況を作っておきます。 今回は負荷試験が目的なので、負荷試験中でも快適な(?)操作が出来るように性能の高いEC2インスタンスにしてみました。 ・EC2インスタンス作成と準備 まずは EC2インスタンスを作成します。 HDDの負荷試験を行うので、EBSタイプでなく InstanceStore (ローカルの EphemeralDisk を使用する)
Four Linux server monitoring tools
Here is four strong monitoring tools i would like to present for you. htop - interactive process viewer You may know the standard tool for watching real time processes on your machine top. If not, run $ top to see it in action, and $ man top to read the manual. The htop is a widely extended version of top, with a big overview (eg. full commands, visualization, gui and ui), a mouse-clicking interac
Follow-up on "Linux server monitoring tools" - Hacker News suggestions in a list
This is a follow-up post on my previous post "Four Linux server moniting tools" which ended up on the frontpage of Hacker News for a pretty long time, and got a lot of great activity from a lot of people in the Hacker News community, and even people who has been developing on the mentioned tools. There was so many great suggestions, so i have decided to make a list of a few of the most mentioned u
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