Strange 302

[Nicholas_Maesepp at scee.net]

Hi All

 Been running varnish-3.0.2 revision 55e70a4 for a couple weeks using 
-smalloc and 6G. Got several of them and they run fine for a couple weeks 
and for the 2nd time now the first cache has stopped serving a key css 
file and returning a 302. I don't cache the css and I also don't implement 
any 302 redirects via varnish.

 GET 
http://www.example.com/r09_d71/static/includes/style/portal_combined_min.css 
HTTP/1.1" 302 210 "http:/www.example.com/" "Mozilla/5.0 (Windows NT 6.1; 
WOW64; rv:12.0) Gecko/20100101 Firefox/12.0"

After a restart of varnish only I get 
 
GET 
http://www.example.com/r09_d71/static/includes/style/portal_combined_min.css 
HTTP/1.1" 200 44805 "http://www.example.com/" "Mozilla/5.0 (Windows NT 
6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0"

I believe a few other image objects may also not load properly but it is 
hard to tell with a broken css and the interesting part is I don't cache 
the css whilst I do the images. 

I have made some tweaks(thanks internet), which I may not fully understand 
and worked fine in limited testing whilst giving performance improvements.

-p log_hashstring=off \
             -p shm_workspace=32768 \
             -p thread_pool_workspace=262144 \
             -p http_gzip_support=off \
             -p http_range_support=on \
             -p http_req_hdr_len=9072 \

Any ideas why I would get a 302? I track varnish memory using cloudwatch 
(in AWS) and at the time of restart it was at 65% and had been on the 
decline for a couple hours from 88%. The total Ram on the box is 7.5G so 
90% is about the limit varnish will hit. Have I not allowed enough RAM for 
worker threads?

# # The minimum number of worker threads to start
VARNISH_MIN_THREADS=30
#
# # The Maximum number of worker threads to start
VARNISH_MAX_THREADS=1000
#
# # Idle timeout for worker threads
VARNISH_THREAD_TIMEOUT=120



Cheers

Nick Maesepp










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