[mythtv-commits] Ticket #3361: Improve Preview Generation

MythTV mythtv at cvs.mythtv.org
Sat Dec 8 17:46:55 UTC 2007


#3361: Improve Preview Generation
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 Reporter:  danielk  |        Owner:  danielk
     Type:  task     |       Status:  new    
 Priority:  minor    |    Milestone:  unknown
Component:  mythtv   |      Version:  head   
 Severity:  low      |   Resolution:         
  Mlocked:  0        |  
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Comment(by sphery <mtdean at thirdcontact.com>):

 The attached patch, mythtv-find_file_for_preview_gen.patch , modifies the
 Storage Group changes committed in [15029] based on the suggestion from
 Chris Pinkham at http://www.gossamer-
 threads.com/lists/mythtv/dev/303576#303576 .  I think the changes are as
 he suggested and fit in well with the preview generator changes in
 [15029], but I'm happy to make additional changes as necessary.

 Without the patch, going to the MythWeb Recorded Programs page takes
 forever and results in a huge CPU usage spike (mythbackend was running at
 100% on my Athlon XP 2400+ (load average > 6) for so long that I just
 restarted it; on Chris Petersen's quad-core (Core 2?) backend, it was
 taking 400% and recovered after a few minutes).  Individual preview
 generation jobs seem to work without too much issue before the patch;
 however, requesting a large number of previews simultaneously overwhelms
 mythbackend because of the recursive, recursive searches.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/3361#comment:7>
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