Lag time for overwritten Word documents to update

I wonder if anyone could help point me to factors that might mean that it takes days for an overwritten file (a Word document in the latest case) to show the updated version to download in preview and live (when it is already showing in the details screen). The editors I work with have reported ths quite a few times, even viewing the pages with /_nocache doesn't help. But eventually it seems to update (this example Word document has taken almost a week.


Any ideas of where I should be looking for the cause of this issue?



Many thanks in advance for any suggestions.



Alison

Start with checking any caching settings

Are these files using __data URLS, meaning that Apache is serving them? Or are you facing Matrix to serve them?

http://www.bodleian.ox.ac.uk/__data/assets/pdf_file/0004/65848/admissions-form-A.pdf


The former it looks like… A cache in Matrix?



Thanks for this.



A

[quote]
http://www.bodleian.ox.ac.uk/__data/assets/pdf_file/0004/65848/admissions-form-A.pdf



The former it looks like… A cache in Matrix?



[/quote]



Ok, so it is apache serving the files.



I don't really think this is anything more than just local browser caching. So, if you upload a new file, the user might still have that old file in their browser cache. So really, they need to clear that, and then download the new file.