[mythtv-users] recording not starting on time - one cause
gull at gull.us
Sun Dec 16 21:50:46 UTC 2007
On Dec 16, 2007, at 1:09 PM, Chris Isip wrote:
> In my effort to get rid of the ivtv buffers full errors in dmesg, I
> have made a couple of conclusions. Running optimize_mythdb.pl and
> backing up the mythtv database will result in this error.
> Furthermore, backing up the myth database with mysqldump causes the
> server to be unresponsive for the duration of the backup which means
> no playback possible on any frontends and no recording will start.
Yes, both of these things lock the tables so they aren't changed
during the operation. (Changing the tables during a backup, for
example, would result in an inconsistent backup.)
If the time mysqldump takes is a problem, you might want to use
mysqlhotcopy instead. It makes a backup by copying the table files.
The database still has to be locked, but for a much shorter time. The
disadvantage is it's not portable like a mysqldump backup. If you
have to reload the backup, you need to do it on the same version of
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