Abnormal delays in download

Pierre Couderc pierre at couderc.eu
Sun Aug 1 20:38:48 UTC 2021

On 8/1/21 3:32 AM, Maxim Dounin wrote:
> Hello!
> On Fri, Jul 30, 2021 at 10:40:00AM +0200, Pierre Couderc wrote:
>> I am trying to download a 12M pdf file and it takes more than 4 minutes
>> with http nginx while it takes a few seconds with scp.
>> I have asked detailed log here https://paste.debian.net/1206029/
>> I see timeouts but I am not able to interpret them correctly.
>> nginx is in lxd container in a nearly not used  server (htop load
>> average 0.08 ...).
>> I use nearly defaut debian configuration of nginx.
> The logs provided suggest that the client is limiting download
> rather than nginx.  Further, the client seems to do at least 17
> various range requests to the file which is being downloaded, thus
> downloading many more than the file itself, but this is probably
> not the issue.  Rather, the issue seems that the client does not
> proceed with the file download while doing these requests.
> Try disabling Firefox PDF Viewer to see if it helps (Preferences
> -> General -> Applications -> Portable Document Format (PDF), set
> to "Save File", see [1]).  Alternatively, try using curl (or wget,
> or fetch, or whatever you prefer) to download the file instead of
> trying to view it in the browser.
> [1] https://support.mozilla.org/en-US/kb/view-pdf-files-firefox-or-choose-another-viewer#w_disable-the-built-in-pdf-viewer-and-use-another-viewer
Thank you very much, I had not the idea it could be a client such as 
firefox, which I suppose bulletproof...

So I followed your idea and tried with wget : about  2 minutes 40s..

This is too much long too as with scp (in wifi at 2meters from the 
server) it is only 3 seconds... ;)

Log is here (shorter ;) : https://paste.debian.net/1206278/

Thank you again...


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