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sample_load - a load logger
sample_load is a highly configurable load-logger. It has some features I desperately needed when I was involved in the development of a the "www.geldshop.nl"-website.sample_load takes a sample of the load-average of your system with a configurable interval. You can also set the minimum load for which samples should be logged. The maximum load (again; configurable) indicates at what load sample_load should terminate itself.
The the layout of the timestamp can be anything what the "strftime" C-function lets you define.
From version 2.0, sample_load can also log the amount of memory in use (physical/swap). sample_load has a configurable buffer-size, this is to prevent artificially higher load because of frequent open/write/close filesystemcalls.
Version 3.0 has a new option enabling the logging of the process that used the most cpu-time. sample_load can now also automatically shoot a process using too much cpu-time or memory (all configurable).
Users of version 3.x: please update to 3.6! 3.0/.5 contains a bug causing random processes to be killed!
Support: none. But you could give it a try on irc. Connect to irc.openprojects.net, channel 'sample_load'.
Thanks to Nexus B.V. for allowing me to place this application on my site under the GPL-license.
License: GPL
The sourcecode of this program can be downloaded via this link: sample_load-3.8.tgz.
Using internet explorer and trying to download sample_load.tgz? Press the right button on the file, pick "save as..." and enter "sample_load-3.8.tgz". That should do it.
Do you like this program? You can find my C.V. here :o)
For some serious performance analasys under Linux, have a look at atsar.
History
| Date | Version | Changes |
| January 19, 2005 | 3.8 | SQL output did not work for all databases. Fixed. |
| August 2, 2004 | 3.7 | Logging of process that used the most cpu-time did not work. Fixed. |
| October 27, 2000 | 3.65 | No longer uses /dev/tty, uses /dev/stdout instead so piping works again. |
| October 23, 2000 | 3.6 | Fixed bug causing processes to be killed, even when option was disabled. Please update to this version! |
| October 18, 2000 | 3.5 | The program now can log into a SQL-database. The package finally includes a man-page (sort of :-]). |
| October 16, 2000 | 3.0 | Added logging of proces which uses the most cpu-time, added kill-option for processes using too much memory or cpu-time |
| September ??, 2000 | 2.1 | Memory-amount logging can now optionally be done in KB/MB/GB. |
| September 11, 2000 | 2.0 | Added logging of memory-in-use (physical/swap), fixed bug where outputfile had to exist |
| July 31, 2000 | 1.0 | Initial release |
| Slackware packages |
P.s.: have a look at 'atsar'. It is a port of the famous 'sar'-tool to Linux. It is essential when doing performance analysis. You can find it here: ftp.atcomputing.nl/pub/tools/linux/.
Suggestions are welcome! Please use this form.