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Linux Process Snapper - Tanel Poder Consulting

Linux Process Snapper (pSnapper, psn) is part of my open source 0x.tools suite of tools for Linux performance troubleshooting and always-on profiling of production systems. pSnapper is a Linux /proc profiler that works by sampling Linux task states and other metrics from /proc/PID/task/TID pseudofiles. pSnapper is designed to be a low-tech passive profiler, it does not attach to your program to sl

dann 2020/04/30

linux

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RAM is the new disk – and how to measure its performance – Part 2 – Tools - Tanel Poder Consulting

RAM is the new disk – and how to measure its performance – Part 2 – Tools [ part 1 | part 2 | part 3 ] In the previous article I explained that the main requirement for high-speed in-memory data scanning is column-oriented storage format for in-memory data. SIMD instruction processing is just icing on the cake. Let’s dig deeper. This is a long post, you’ve been warned. Test Environment I will cove

dann 2015/09/21

performance

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Oracle In-Memory Column Store Internals – Part 1 – Which SIMD extensions are getting used? - Tanel Poder Computer Geekery

dann 2015/04/19

oracle

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Peeking into Linux kernel-land using /proc filesystem for quick’n’dirty troubleshooting - Tanel Poder Consulting

Peeking into Linux kernel-land using /proc filesystem for quick’n’dirty troubleshooting This blog entry is about modern Linuxes. In other words RHEL6 equivalents with 2.6.3x kernels and not the ancient RHEL5 with 2.6.18 kernel (wtf?!), which is the most common in enterprises unfortunately. And no, I’m not going to use kernel debuggers or SystemTap scripts here, just plain old “cat /proc/PID/xyz” c