I have noticed this everytime the memory offload happens. This is not a crash or segfault; coz the service does not go down and it keeps in running which is also evident in the graphs shared earlier. I can see the same behaviour everytime when operating system swaps. Can you confirm if this is a ideal behaviour with varnish? <div><br></div><div><div><br><br>Regards,<br>
Anand<br>
<br><br><br>From: Lasse Karstensen <lkarsten@varnish-software.com><br>Sent: Tue, 18 Nov 2014 16:07:51 <br>To: Anand Shah <anand@rediff-inc.com><br>Cc: varnish-dev@varnish-cache.org<br>Subject: Re: Swap flushes all objects in cache<br>On Mon, Nov 17, 2014 at 01:05:22PM -0000, Anand Shah wrote:<br>
> Hello,When Linux pages outs data to disk; it destroys all cached<br>
> objects which is contrary to the architecture published by PHK.When<br>
> physical memory becomes scarce the Linux memory management subsystem<br>
> must attempt to free physical pages.<br>
[cut]<br>
<br>
Hi.<br>
<br>
Please consider adding line feeds to your future emails, everything on<br>
one line is very hard to read.<br>
<br>
Based on the attached graphs I'd expect this to be caused by Varnish<br>
asserting/crashing, or that the operating system's out-of-memory<br>
handling killed off the process.<br>
<br>
More information on Varnish troubleshooting:<br>
<br>
https://www.varnish-cache.org/docs/4.0/users-guide/troubleshooting.html<br>
<br>
<br>
-- <br>
Lasse Karstensen<br>
Varnish Software AS<br>
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