Last updated: 4 May 2022
Mapit Caches
Mapit uses Django’s in-built middleware to cache responses to memcached. Mapit instances use a shared memcached instance.
Clear the shared cache
SSH onto a mapit instance
Connect via Telnet to memcached instance:
telnet mapit-memcached 11211
- Enter the following:
flush_all
You may need to clear the cache after updating the Mapit database with new data. As each Mapit instance has it’s own database, make sure to clear the cache after you’ve updated all Mapit instances.
Limitations of caching
Currently Django will only caches responses from the /postcode endpoints and not /area. This is due to /area responses being streaming responses.
Bypassing the cache
Cache keys are based on the URI of the request, therefore you can avoid the cache by adding a unique query string. For example /postcode/sw71ne?nocache=<random>.