<div dir="ltr">Hi Charles,<div><br></div><div>So, if I'm reading this right, there's no discrepancy. Varnish will malloc the full storage (malloc), and will mmap a file the size of the full storage (file). So even though the storage is not used, it's allocated.</div><div><br></div><div>Does it make sense, or did I miss something?</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>-- <br></div>Guillaume Quintard<br></div></div></div>
<br><div class="gmail_quote">On Mon, Jul 10, 2017 at 1:23 PM, Bender, Charles <span dir="ltr"><<a href="mailto:charles@beachcamera.com" target="_blank">charles@beachcamera.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">There is a large discrepancy between Varnish resident memory reported by top vs reported by varnishstat. Varnish is configured with both malloc and file storage; 20G malloc and 75G file storage.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">These are the startup parameters-<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">VARNISH_STORAGE="memcache=<wbr>malloc,20G -s filecache=file,/mnt/xvdf1/<wbr>varnish/varnish_storage.bin,<wbr>75G"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">After running for a few days top is reporting more than twice amount of memory used for varnishd process than varnishstat.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">From top-<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND <wbr> <wbr> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> 1083 varnish 20 0 82.235g 0.014t 7.765g S 75.7 51.4 2159:07 varnishd <wbr> <wbr> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">From varnishstat-<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">SMA.memcache.g_bytes <wbr> <wbr> 5.20G 39.65K . 5.20G 5.20G 5.20G<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">SMA.memcache.g_space <wbr> <wbr> 14.80G -39.65K . 14.80G 14.80G 14.80G<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">SMF.filecache.g_bytes <wbr> <wbr> 7.78G 27.97K . 7.78G 7.78G 7.78G<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">SMF.filecache.g_space <wbr> <wbr> 67.22G -27.97K . 67.22G 67.22G 67.22G<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">This is the relevant part of the VCL regarding storage backend selection-<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">sub vcl_backend_response {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> # define separate cache storage groups<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> if (bereq.http.host ~ "^(encore|thereal|static)\.(<wbr>beachcamera|buydig)\.com") {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.storage_hint = "filecache";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.http.X-Cache-Storage = "disk";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> } elsif (bereq.url ~ "(?i)\.(jpg|jpeg|gif|ico|pdf|<wbr>swf|png|zip)") {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.storage_hint = "filecache";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.http.X-Cache-Storage = "disk";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> } elsif (bereq.url ~ "(?i)product\-image\.aspx") {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.storage_hint = "filecache";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.http.X-Cache-Storage = "disk";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> } else {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.storage_hint = "memcache";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <wbr> set beresp.http.X-Cache-Storage = "memory";<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> }<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Can post entire VCL if needed.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Would think that since varnishstat reports 5.20G RAM used the resident memory should be around 6-7G, 14G seems excessively high. File storage should use minimal resident memory, correct?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Varnish was installed from Varnish Cache 4.1 repo. No VMODs loaded except std and directors. Using latest 4.1.7<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Anything else you need please let me know.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><u></u> <u></u></span></p>
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