Proxy Cache Configuration

proxy-cache.conf

# Allow only one request at a time to populate a new cache element, duplicate requests will wait
# for 5s or the time set with proxy_cache_lock_timeout if set.
proxy_cache_lock on;

# Allow background cache update for request, serve stale during update.
# NOTES
# - requires enabling serve stale on update with proxy_cache_use_stale directive
#   containing the "updating" parameter.
proxy_cache_background_update on;

# Conditions allowing stale responses.
proxy_cache_use_stale error
                      timeout
                      invalid_header
                      updating
                      http_500
                      http_502
                      http_503
                      http_504;

# Ignore Cache Control headers
# NOTES
# - Allow nginx to control cache.
proxy_ignore_headers X-Accel-Expires Expires Cache-Control;

# Product Availability Responses Cache Zone
proxy_cache_path /var/cache/nginx/availability levels=1:2 keys_zone=availability:1m max_size=10m inactive=5m use_temp_path=off;