Filipe Brandenburger wrote:
> 
> On Mon, Jul 6, 2009 at 23:57, Les Mikesell<lesmikesell AT gmail DOT com> 
> wrote:
>> The only thing that seems slightly strange in the graphs is the load average
>> going to 12 as the backups start and staying there a couple of hours.  
>> Normally
>> that's the average number of 'other' processes that are waiting for CPU but
>> otherwise runnable (i.e. not themselves blocked on i/o).
> 
> I used to think that, but in fact processes that are blocked in disk
> i/o (the ones in "D" state) do count in load average. So the load
> average of 12 in this case probably means processes writing to the
> disk.

That must be a Linux quirk (bug?) but it does explain some numbers I've 
seen.  Regardless, there shouldn't be that many things running.
> 
> Stephen, it seems strange to me that there are 8 BackupPC_nightly
> processes running, have you increased $Conf{MaxBackupPCNightlyJobs}
> from 2 to 8?
> 
> I would suggest you start by setting $Conf{MaxBackupPCNightlyJobs}
> back to 2 or even to 1. If you set it to 1 and it can't finish its job
> in 24h, then increase $Conf{BackupPCNightlyPeriod} to 2 or 4 so that
> only 1/2 or 1/4 of the pool is processed each night.

More importantly, BackupPC_nightly shouldn't overlap with backup jobs if 
possible.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com


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