title: MuMin Package - Dredge of Model still running 15 hours later
body: <p>I am running a dredge of a linear mixed effect model in the MuMin package in R, The model is quite big (see below)</p>
  
  <pre><code>&gt;     Monster &lt;- lmer(Fw.FratioFall ~ Average_mintemp_winter + (Average_mintemp_winter^2)
  &gt;                     + percentage_woody_coverage + (percentage_woody_coverage^2)
  &gt;                     + kmRoads.km2 + (kmRoads.km2^2) + Fracking 
  &gt;                     + WELLS_ACTIVED + (WELLS_ACTIVED^2) + BadlandsCoyote.1000_mi
  &gt;                     + (BadlandsCoyote.1000_mi^2) + cougar_presence + COYOTE_springsurveys
  &gt;                     + (COYOTE_springsurveys^2) + d3.1 + (d3.1^2) + WT_DEER_springsurveys
  &gt;                     + (WT_DEER_springsurveys^2) + WT_DEER_fallsurveys + (WT_DEER_fallsurveys^2) 
  &gt;                     + ELK_springsurveys + (ELK_springsurveys^2) + ELK_fallsurveys + (ELK_fallsurveys^2)     
  &gt;                     + (BadlandsCoyote.1000_mi*WELLS_ACTIVED) + (BadlandsCoyote.1000_mi*d3.1) 
  &gt;                     + (BadlandsCoyote.1000_mi*WELLS_ACTIVED*d3.1) 
  &gt;                     + (cougar_presence*percentage_woody_coverage) 
  &gt;                     + (COYOTE_springsurveys*WELLS_ACTIVED) 
  &gt;                     + (percentage_woody_coverage*cougar_presence*COYOTE_springsurveys)
  &gt;                     + (Average_mintemp_winter*COYOTE_springsurveys) 
  &gt;                     + (Average_mintemp_winter*BadlandsCoyote.1000_mi)
  &gt;                     + year + (1 | YEAR) + (year | StudyArea),  REML = F, data = mydata)
  </code></pre>
  
  <p>the Dredge function has been running now for 15 hours on an i7 processor and I am wondering if this is normal, what kind of time frame should I expect for a model this size?</p>
  
  <p>I have checked the logs and R hasnt crashed, the dredge is still running (it is producing "singular fit" models in abundance)</p>
  
  <pre><code>singular fit
  singular fit
  singular fit
  singular fit
  singular fit
  singular fit 
  </code></pre>
  
  <p>I tested a smaller model and the dredge function took approximately a minute </p>
  
  <p>Smaller model </p>
  
  <pre><code>&gt; sample &lt;- lmer(Fw.FratioFall ~ Average_mintemp_winter +
  &gt; (Average_mintemp_winter^2)  + year + (1 | YEAR) + (year | StudyArea), 
  &gt; REML = F, data = mydata)
  </code></pre>
  
  <p>Can anyone advise on time frames for a model dredge with the MuMin package. Thank you. </p>