Maximizing Vault Performance
A large number of documents in a project degrades performance. More projects with fewer documents (fewer than 1000 or 2000 documents per project) results in better performance.
Clients can hide projects to improve performance.
If you operate over a network, network performance affects PDMWorks performance. PDMWorks cannot make a slow network faster.
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The larger the vault to slower it will be to upgrade the files or reboot the server and rebuild the vault - I know a 10GB vault takes almost an hour to rebuild the tree.