title: ROLLBACK when I upload file more 100M to S3 via server EC2
body: <p>I can upload video less than 100M via EC2 to S3. But when I try to upload file more then 100M I have this problem:</p>
  
  <p>The tail of production.rb: </p>
  
  <pre><code>[dbe91a4c-0c42-48c2-8165-ae9f71cc39c4] Command :: file -b --mime '/tmp/RackMultipart20180220-14826-1x1yb8.mp4'
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4] [paperclip] Trying to link /tmp/RackMultipart20180220-14826-1x1yb8.mp4 to /tmp/b93945416b51d7b7076bcf9f697819dd20180220-14826-5mkak1.mp4
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4] [paperclip] Trying to link /tmp/b93945416b51d7b7076bcf9f697819dd20180220-14826-5mkak1.mp4 to /tmp/1c3b7d3617b75c8c2177c1dfde03e9ce20180220-14826-kklptr.mp4
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4] Command :: file -b --mime '/tmp/1c3b7d3617b75c8c2177c1dfde03e9ce20180220-14826-kklptr.mp4'
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4]    (0.1ms)  BEGIN
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4] [paperclip] Trying to link /tmp/b93945416b51d7b7076bcf9f697819dd20180220-14826-5mkak1.mp4 to /tmp/1c3b7d3617b75c8c2177c1dfde03e9ce20180220-14826-bw0wgm.mp4
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4] Command :: file -b --mime '/tmp/1c3b7d3617b75c8c2177c1dfde03e9ce20180220-14826-bw0wgm.mp4'
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4]    (0.1ms)  ROLLBACK
  [dbe91a4c-0c42-48c2-8165-ae9f71cc39c4]   Rendering videos/new.slim within layouts/application
  </code></pre>
  
  <p>And in file <code>/tmp/</code></p>
  
  <pre><code>total 809304
  drwxrwxrwt  8 root   root        4096 Feb 20 13:15 ./
  drwxr-xr-x 23 root   root        4096 Feb 13 14:54 ../
  -rw-------  4 ubuntu ubuntu 133547466 Feb 20 13:09 1c3b7d3617b75c8c2177c1dfde03e9ce20180220-14826-bw0wgm.mp4
  -rw-------  4 ubuntu ubuntu 133547466 Feb 20 13:09 1c3b7d3617b75c8c2177c1dfde03e9ce20180220-14826-kklptr.mp4
  -rw-------  4 ubuntu ubuntu 133547466 Feb 20 13:09 b93945416b51d7b7076bcf9f697819dd20180220-14826-5mkak1.mp4
  drwxrwxrwt  2 root   root        4096 Feb 13 14:54 .font-unix/
  -rwx------  1 ubuntu ubuntu        93 Feb 20 12:04 git-ssh-where-film-production-dunice.sh*
  drwxrwxrwt  2 root   root        4096 Feb 13 14:54 .ICE-unix/
  -rw-------  1 ubuntu ubuntu 279808355 Feb 20 12:50 puma20180220-11196-cyloww
  -rw-------  1 ubuntu ubuntu  14679270 Feb 20 12:50 RackMultipart20180220-11196-1t5jbyk.mp4
  -rw-------  4 ubuntu ubuntu 133547466 Feb 20 13:09 RackMultipart20180220-14826-1x1yb8.mp4
  drwx------  3 root   root        4096 Feb 14 06:41 systemd-private-8b23ec1f7e8644498bf0091b6fd675d2-systemd-timesyncd.service-xl7iRW/
  drwxrwxrwt  2 root   root        4096 Feb 13 14:54 .Test-unix/
  drwxrwxrwt  2 root   root        4096 Feb 13 14:54 .X11-unix/
  drwxrwxrwt  2 root   root        4096 Feb 13 14:54 .XIM-unix/
  </code></pre>
  
  <p>I upload files via Paperclip. Locally it works without problem.</p>
  
  <p>This command 
  <code>file -b --mime '/tmp/1c3b7d3617b75c8c2177c1dfde03e9ce20180221-12338-1xbpmbo.mp4'</code></p>
  
  <p>return this:</p>
  
  <pre><code>application/octet-stream; charset=binary
  </code></pre>