random beeps during backup

griffin tucker <[email protected]>
Newsgroups gmane.comp.sysutils.backup.rdiff-backup.general
Message-ID <CAKJX5A4vv0czWzdTALYUj1MEWBQmCFDYGvVS_b3=NwxhR+jZ=w@mail.gmail.com> 
my debian testing virtual machine randomly beeps, sometimes really
long beeps, when running rdiff-backup after a long time (overnight)
and only when interacting with the installation while it's still
running

nothing in /var/log/messages

rdiff-backup doesn't report any errors (empty log file)

i've limited it's processor count to 2 and re-run it, and there's no
beeping anymore

i'm just wondering, can i cap rdiff-backup's cpu usage to a percentage
so i can utilise all cores but not experience system instability?

otherwise, can i cap rdiff-backup's thread count?
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