Perch dropouts when updating

Hi

I have a site that is growing quickly, database is around 200meg and about 100 individual pages with 2000 or so if you include the list and detail pages.

My client is constantly getting kick out of the perch admin whilst updating old content and adding new content.

There local internet speed is fine but they are on shared cloud hosting, Do you have any experiance on these sort of issues or do they need to move to a vps solution

Regards

Brett