On Tue, May 31, 2011 at 9:24 AM, Francois Pussault <fpussa...@contactoffice.fr> wrote: > Hi all, > > load is not realy a cpu usage %. > In facts it is sum of many % (cpu real load, memory, buffers, etc...)
No, it isn't. > we should consider load as a "host" ressources %... No, we shouldn't. The load average is a decaying average of the number of processes in the runnable state or currently running on a cpu or in the process of being forked or that have spent less than a second in a sleep state with sleep priority lower than PZERO, which includes waiting for memory resources, disk I/O, filesystem locks and a bunch of other things. You could say it's a very vague estimate of how much work the cpu might need to be doing soon, maybe. Or it could be completely wrong because of sampling bias. It's not very important so it's not really critical for the system to do a good job guessing this number, so the system doesn't really try too hard. This number may tell you something useful, or it might be totally misleading. Or both. //art //art
