[mythtv-commits] Ticket #2194: Patch to randomise mythfilldatabase times

[MythTV]

#2194: Patch to randomise mythfilldatabase times
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 Reporter:  willu.mailingLists at cse.unsw.edu.au  |       Owner:  ijr
     Type:  enhancement                         |      Status:  new
 Priority:  minor                               |   Milestone:     
Component:  mythtv                              |     Version:     
 Severity:  medium                              |  
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 Currently myth has a housekeeper thread that can run
 mythfilldatabase(mfd).  It carefully takes a pair of times in the
 preferences, and is supposed to be run between those times.  And it is -
 it is run as soon as the housekeeping thread runs between those times.
 For someone who keeps their my box on all the time, this leads to mfd
 running in the first 5 minutes of the 'available' time period every day.

 The [http://www.tvguide.org.au/ Australian Community TV Guide] was seeing
 load spikes in the first five minutes of popular hours.

 This patch modifies the housekeeper thread so that it spreads its load.
 It will randomise the time it calls mfd.  In particular, there is a small
 probability that mfd will be called each time the housekeeping thread
 wakes up.  If mfd hasn't been called by the last 30 mins of the available
 window then it is called.  The probability of being called is adjusted so
 that times are spread over the entire time range.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/2194>
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