[Varnish] #1617: Varnish 4 weird memory consumption / calculation

[Varnish]

#1617: Varnish 4 weird memory consumption / calculation
----------------------+--------------------
 Reporter:  whocares  |       Owner:
     Type:  defect    |      Status:  new
 Priority:  normal    |   Milestone:
Component:  varnishd  |     Version:  4.0.2
 Severity:  normal    |  Resolution:
 Keywords:            |
----------------------+--------------------

Comment (by whocares):

 Followed your suggestion and the numbers indeed look much nicer now. I'll
 let it run for a while an report back when I have better data.
 That said, I have to admit I'm curious: I've read the parameter list from
 top to bottom and back but never figured that fetch_chunksize would have
 such an influence on memory usage. Care to explain what happens there? For
 even if there'd be, say 1000 threads active at the same time I imagined
 that with a buffer size of 128k I'd "just" spend 128M of RAM for the
 different chunk buffers but not something in the GB ranges.

-- 
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1617#comment:2>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator