Understanding why Varnish decided to clean the memory

[Cherian Thomas]

Hi all,

Screenshot of all the varnish metrics: http://d.pr/i/MtwCJx

Every once in a while varnish throws all the objects in the cache out and I
have to re-warm it despite a year of TTL for all the objects and a large
grace period. This happened yesterday at roughly 3:45 AM.

What am I doing wrong?

Other machine metrics: http://d.pr/i/0j01vC
- Cherian
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