software

iostat screenshots

Both runs have been done on a single 120GB 7200rpm IDE disk. Command used: iostat -x 5 (extended statistics, sample every 5 seconds).

[img_assist|nid=866|title=|desc=|link=none|align=none|width=510|height=202]

iostat - Linux I/O performance monitoring utility

iostat is a command line I/O performance monitoring utility. It is present in almost every major Unix flavor in use today, and here you can get the version for Linux.

It works on both 2.4 & 2.6. What makes it different from other Linux utilities, which mostly show only I/O transfer rates, is that you finally can get important information about disk utilization, number of requests, average queue size and disk & queue wait times. No serious sysadmin should be without it. Check the screenshots to learn more.

XMM screenshots

All screenshots were taken on my home workstation (Dual PIII 1GHz, 768MB RAM). Brown color represents kernel memory usage (miscellaneous caches), red is for active memory (page/buffer cache in use and mapped pages - applications), yellow is inactive page/buffer cache, green is free memory and finally orange color represents swap usage.

[img_assist|nid=6|title=|desc=|link=none|align=none|width=131|height=166]

XMM - Monitor Linux MM inactive/active lists graphically

This utility provides you with a neat X11 window to monitor memory utilization of your server or workstation. It is similar to the popular xmem utility but is IMHO slightly more appropriate for monitoring a modern Linux VM subsystem (2.4 kernel and up).

Subscribe to RSS - software