Shorts notes on performance monitoring :
- Nagios : not a good idea. Nagios isn’t made for this even if there is a chapter about “Performance Data”, it is only seen as a side effect of service monitoring. ie : how did service monitoring perform.
- KSysguard : looks good : client/server application. Client uses KDE.
- Moodss : looks good too. Client/server application. Client uses TCL. Has some intelligent statistic processing.
- sysstat (sar/sadc) : command line tool. The standard way. Less invading than the others I guess. Only recently can the data be easily formated : sadf.
For MS-Windows, you can use perfmon : Performance monitor in the administrative tools.