In addition to creating one to one mappings of Nintex and SharePoint content databases (Covered here: https://community.nintex.com/docs/DOC-1092). Workflow history lists can be created on a one to one basis for each workflow in the environment using the below steps:
Typically we start to see performance degradation when a Workflow History list reaches 2,000 – 4,000~ list items. Even if performance is not noticeably impacted by Workflow History list size, better performance can be achieved by keeping this list size minimal.
When a list has grown too large two approaches can be taken to address the situation:
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