How do I update a global variable?

In my django application I have a global variable 'gv' which is
accessed by different requests coming from the end users.

Now 'gv' holds a data of 2 MB size which needs to be update at regular
interval, pulling 2 MB data from the database for every request
doesn't make sense.

For this I have planned to use celery as a scheduler which will do the
update but looks like it runs as a different process and can't access
'gv'!
What could be possible ways where celery can update 'gv'? I can think
of calling a url from celery which updates 'gv' but not sure if this
is the right way of doing it.

Appreciate your responses

Thanks
Vishal

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