On Tue, 2007-12-18 at 15:21 +0200, Dotan Shavit wrote: > > I don't think that swapping has anything to do with the IRQ behavior I'm > > seeing, > In that case, it probably is network related... > Can you provide more details regarding this? > > Is the Apache server you mentioned located on the same machine?
Indeed. > Are you connected to a private vlan (or seeing non relevant traffic)? Its infrastructure I don't really have access to so I wouldn't know, but I'm on a good switch (maybe with a vlan) and I don't see traffic that isn't meant for me. > Do you get this (a lot of time is spent in the "hard-IRQ" region) all the > time > or just when the server is accessed by it's clients? I'm always seeing some traffic, so its hard to say if I wouldn't see hard-IRQ when there aren't any clients. But interestingly enough a second identical machine which is currently doing nothing except maintaining a replica of the MySQL database on the first is also seeing high hard-IRQ counts. A third completely different computer on a different network with different work loads that also maintains a replica of the first MySQL database is also seeing high IRQ usage. > What is the difference between this machine and the other (I understand the > other machine works OK) ? Hardware wise and OS wise - nothing. Software wise there are many different things, but most prominently: * it doesn't see the same kind of traffic (which I currently don't think is the issue as the second server above doesn't see any traffic) * It doesn't replicate its databases. -- Oded ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
