Re: Amanda-induced sluggishness on Mac OS X?
On Sun, 15 Feb 2004, Kirk Strauser wrote: > I use Amanda to backup an iMac running Mac OS X (10.2). The backup runs > perfectly, but the machine is horribly unresponsive while tar is running, > both during the estimate and dump stages. Renice'ing the tar processes > doesn't seem to help, so I'm guessing that it might be an IDE DMA thing, > although I don't know my way around Mac hardware well enough to know. > > Has anyone else seen this, and hopefully found a way to lessen the impact? Yes, we've seen it, too. Have not (yet) dug into it to try to figure out what's going on. The machine we've noticed it on is a Powerbook. -Mitch
Re: Amanda-induced sluggishness on Mac OS X?
On Sun, Feb 15, 2004 at 09:56:40PM -0600, Kirk Strauser wrote: > I use Amanda to backup an iMac running Mac OS X (10.2). The backup runs > perfectly, but the machine is horribly unresponsive while tar is running, > both during the estimate and dump stages. Renice'ing the tar processes > doesn't seem to help, so I'm guessing that it might be an IDE DMA thing, > although I don't know my way around Mac hardware well enough to know. > > Has anyone else seen this, and hopefully found a way to lessen the impact? Can you tell if it is cpu or i/o bound? For example, do you have "top" or some other utility to say if a high percent of cpu is being used and by what application(s)? Or might it be the IDE drive as you suggest. You might see a delay when switching to a different shell window (as things are brought back from swap space) are but then it seems to run pretty normal. If something like a big dd or cat takes most of the cpu, on Solaris that can be a quick and dirty indication that the IDE drive is not using DMA. -- Jon H. LaBadie [EMAIL PROTECTED] JG Computing 4455 Province Line Road(609) 252-0159 Princeton, NJ 08540-4322 (609) 683-7220 (fax)
Amanda-induced sluggishness on Mac OS X?
I use Amanda to backup an iMac running Mac OS X (10.2). The backup runs perfectly, but the machine is horribly unresponsive while tar is running, both during the estimate and dump stages. Renice'ing the tar processes doesn't seem to help, so I'm guessing that it might be an IDE DMA thing, although I don't know my way around Mac hardware well enough to know. Has anyone else seen this, and hopefully found a way to lessen the impact? -- Kirk Strauser In Googlis non est, ergo non est. pgp0.pgp Description: PGP signature
