piotr.sikora at frickle.com
Tue Mar 30 06:43:31 MSD 2010
> He's referring to a cache stampede, when an item in the proxy cache
> expires and multiple threads simultaneously try to repopulate it causing
> load spikes and possible locking conditions.
nginx changes status of expired cache items to "UPDATING" for the period of
time when it fetches new copies. Combine this with "proxy_cache_use_stale
updating" and "dogpiling" shouldn't be a problem.
Piotr Sikora < piotr.sikora at frickle.com >
More information about the nginx