To supplement what Blake said, I remember watching this awesome video about Push at Facebook: https://www.facebook.com/video/video.php?v=10100259101684977 https

To supplement what Blake said, I remember watching this awesome video about Push at Facebook: https://www.facebook.com/video/video.php?v=10100259101684977 https://www.facebook.com/video/video.php?v=10100259101684977 They push changes daily, and if anything, according to the video, they say they stay away from major pushes on Friday because weekend traffic is significantly lower and some problems may not manifest under the reduced load before it hits the fan on Monday.