<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Title" content="">
<meta name="Keywords" content="">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Helvetica Neue";
panose-1:2 0 5 3 0 0 0 2 0 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.msoIns
{mso-style-type:export-only;
mso-style-name:"";
text-decoration:underline;
color:teal;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
</head>
<body bgcolor="white" lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">I have caching turned off at the moment because of this (not a big deal -- the cache hit rate would be very low regardless).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It's a bit awkward to work around and this is the only case I can think of where varnish would cause a request that would otherwise succeed to fail.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I'm planning to have multiple caches (small object cache + large object cache for example) but this would not be possible if the response used chunked transfer encoding.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Setting nuke limit very high would work with chunked transfers but also makes it possible for a single response to evict everything else in the cache.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">james<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">varnish-misc <varnish-misc-bounces+jmathiesen=tripadvisor.com@varnish-cache.org> on behalf of Carlos Abalde <carlos.abalde@gmail.com><br>
<b>Date: </b>Monday, December 11, 2017 at 4:11 AM<br>
<b>To: </b>Radu Moisa <rmoisa@yahoo.com><br>
<b>Cc: </b>varnish-misc <varnish-misc@varnish-cache.org><br>
<b>Subject: </b>Re: Varnish sending incomplete responses when nuking objects<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal" style="margin-left:.5in">On 11 Dec 2017, at 07:51, Radu Moisa <<a href="mailto:rmoisa@yahoo.com">rmoisa@yahoo.com</a>> wrote:<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<div>
<div>
<div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Helvetica Neue",sans-serif">Hi!<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Helvetica Neue",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Helvetica Neue",sans-serif">Thanks a lot for the hint!<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Helvetica Neue",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Helvetica Neue",sans-serif">Just so that I understand it better, nuke_limit is the "Maximum number of objects we attempt to nuke in order to make space for a object body."<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Helvetica Neue",sans-serif">If I set it to something like 9999999, varnish will throw out only the number of objects needed to make room for the new request, not the nuke_limit number
of objects, right?<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in">Yes, that's right. While trying to store an object in the cache, if not enough free space is available, Varnish will nuke up to 'nuke_limit' objects. This will happen incrementally, while the object is being fetched
from the backend, stored in the cache, and eventually also being streamed to one or more clients. If the 'nuke_limit' is reached the object won't be cached and client responses will be closed (and therefore clients will end up with a truncated response).<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
<p class="MsoNormal" style="margin-left:.5in">Best, <o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in">--<br>
Carlos Abalde<o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
</div>
</div>
</body>
</html>