[mythtv-commits] Re: Ticket #551: Scheduler consuming all CPU cycles and disk bandwidth (via mysql).

[MythTV]

#551: Scheduler consuming all CPU cycles and disk bandwidth (via mysql).
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 Reporter:  anonymous  |        Owner:  gigem
     Type:  defect     |       Status:  new  
 Priority:  critical   |    Milestone:  0.19 
Component:  mythtv     |      Version:  head 
 Severity:  medium     |   Resolution:       
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Comment (by danielk):

 (In [7911]) References #551.

 Implements a suggestion by gigem to break up the AddNewRecords
 query by 'record' rows. This doesn't make the total query take any
 less time, but allows us to throttle back a little on how quickly
 we demand the data from the DB. As suspected the problem is that
 mysql is running at the same priority as the recording thread,
 so if it is running all out for 20-30 seconds at a go, the
 recorder doesn't get a chance to write enough data to disk.

 This adds a 50 ms sleep between each record row, but this can
 be changed by changing the 'sleepTime' variable in AddNewRecords().
 I don't know yet if this is big enough or bigger than it needs to
 be, so try increasing it if you still have problems, and lowering
 if you do not.

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Ticket URL: <http://cvs.mythtv.org/trac/ticket/551>
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