4 ms·

A few other tools I use are atop (more detailed top info, with logging), iostat (harddrive io) and vmstat (memory and cpu details).

by bcl 15y ago

ootachi 15y ago
Also don't forget Cachegrind. Cachegrind is amazing and runs entirely from user space.
- lutorm 15y ago
  cachegrind is extremely useful, but unfortunately it seems that it's not updated with the current generation processors. Every time I run it, it complains about "unrecognized architecture" or something similar.
dkarl 15y ago
Do you know of any manual or book-style treatment about using those tools for investigating the performance of Linux systems? Every once in a while I have to look at performance problems on Linux systems, but I always start from zero. I need a place where I can study the topic and refresh myself when necessary, because I'm apparently not capable of mastering it via occasional piecemeal experience.
- ghshephard 15y ago
  The closest I've found (and spent 10s, if not hundred+ hours reading) are: System Performance Tuning, 2nd Edition (O'Reilly System Administration) by Gian-Paolo D. Musumeci [1] and the somewhat dated (and Solaris centric) Sun Performance and Tuning: Java and the Internet (2nd Edition) [2] I'd love to hear that there were better book out there - if anyone has read either of those two, and has found a better one, I'll be one-clicking it in 30 seconds. [1] http://www.amazon.com/System-Performance-Tuning-OReilly-Administration/dp/059600284X/ref=sr_1_1?s=books&ie=UTF8&qid=1304012614&sr=1-1 http://www.amazon.com/System-Performance-Tuning-OReilly-Admi... [2] http://www.amazon.com/Sun-Performance-Tuning-Java-Internet/dp/0130952494/ref=sr_1_8?s=books&ie=UTF8&qid=1304012614&sr=1-8 http://www.amazon.com/Sun-Performance-Tuning-Java-Internet/d...
sciurus 15y ago
As a sysadmin. I don't love any other tool nearly as much as I love atop. It comes close to making all other interactive general-purpose performance monitoring tools redundant. The logging, too, is fantastic. There's nothing like looking through the graphs of my metrics gathered by collectd, wondering why a certain spike or pattern occurred, and being able to step through previous days per-process resource usage via atop and figure it out. There's a great introduction to it at https://lwn.net/Articles/387202/ https://lwn.net/Articles/387202/
bostonvaulter2 15y ago
You should try htop and iotop as well. Although atop is generally better for more sysadmin-type things than htop is.

A few other tools I use are atop (more detailed top info, with logging), iostat (harddrive io) and vmstat (memory and cpu details).

by bcl 15y ago

A few other tools I use are atop (more detailed top info, with logging), iostat (harddrive io) and vmstat (memory and cpu details).

ootachi 15y ago

Also don't forget Cachegrind. Cachegrind is amazing and runs entirely from user space.

lutorm 15y ago
cachegrind is extremely useful, but unfortunately it seems that it's not updated with the current generation processors. Every time I run it, it complains about "unrecognized architecture" or something similar.

dkarl 15y ago

Do you know of any manual or book-style treatment about using those tools for investigating the performance of Linux systems? Every once in a while I have to look at performance problems on Linux systems, but I always start from zero. I need a place where I can study the topic and refresh myself when necessary, because I'm apparently not capable of mastering it via occasional piecemeal experience.

ghshephard 15y ago
The closest I've found (and spent 10s, if not hundred+ hours reading) are: System Performance Tuning, 2nd Edition (O'Reilly System Administration) by Gian-Paolo D. Musumeci [1] and the somewhat dated (and Solaris centric) Sun Performance and Tuning: Java and the Internet (2nd Edition) [2] I'd love to hear that there were better book out there - if anyone has read either of those two, and has found a better one, I'll be one-clicking it in 30 seconds. [1] http://www.amazon.com/System-Performance-Tuning-OReilly-Administration/dp/059600284X/ref=sr_1_1?s=books&ie=UTF8&qid=1304012614&sr=1-1 http://www.amazon.com/System-Performance-Tuning-OReilly-Admi... [2] http://www.amazon.com/Sun-Performance-Tuning-Java-Internet/dp/0130952494/ref=sr_1_8?s=books&ie=UTF8&qid=1304012614&sr=1-8 http://www.amazon.com/Sun-Performance-Tuning-Java-Internet/d...

sciurus 15y ago

As a sysadmin. I don't love any other tool nearly as much as I love atop. It comes close to making all other interactive general-purpose performance monitoring tools redundant. The logging, too, is fantastic. There's nothing like looking through the graphs of my metrics gathered by collectd, wondering why a certain spike or pattern occurred, and being able to step through previous days per-process resource usage via atop and figure it out. There's a great introduction to it at https://lwn.net/Articles/387202/ https://lwn.net/Articles/387202/

bostonvaulter2 15y ago

You should try htop and iotop as well. Although atop is generally better for more sysadmin-type things than htop is.