On Feb 17, 2013, at 11:45 AM, Kevin Callahan wrote: > On Feb 17, 2013, at 7:45 AM, LuKreme <krem...@kreme.com> wrote: > >> Kevin Callahan opined on Saturday 16-Feb-2013@23:05:10 >>> My iMac takes about an hour to prepare, backup and cleanup. >>> This happens every hour. >>> Oh - add spotlight indexing to that. >> >> This is very odd. Backups should not take more than a few (3-4) minutes >> unless there is a massive amount of data changed. How much data is being >> backed up each time (Console will tell yu if you don’t happen to see it). > > Yeah, it baffles me how much I see being backed up during times when I've > felt very little should have changed on my system.
> Just now, it backed up 22 MB pretty quickly, but the cleanup took a fairly > long time. I don't know the internals of the OS X backup system, but I know the internals of a few others. From its performance on my own system, I presume it keeps a modest list of stuff that got changed between backups so that it doesn't have to scan the whole file system every hour. I would also presume that this would be tied in somehow with the Spotlight mechanism, as much the same mechanism is required for both jobs. The first thing I would do is clobber all my Spotlight indexes and get them rebuilt -- see if that suddenly gets things working faster AFTER the next scheduled backup. Also, I know that whenever I launch an app that uses an SQLite database (Sequel Pro, MailSteward, a couple others), the database file immediately gets marked as modified, even if all I wanted to do was fetch from it. If the database is huge (e.g., MailSteward), just looking up an old email will schedule the entire multi-gigabyte file for a backup. Does Xcode use SQL databases, or do you have some other app that does? -- Macs R We -- Personal Macintosh Service and Support in the Wickenburg and far Northwest Valley Areas. http://macsrwe.com _______________________________________________ MacOSX-talk mailing list MacOSX-talk@omnigroup.com http://www.omnigroup.com/mailman/listinfo/macosx-talk