Minimizing impact to users during data extract (to SVG)

From experience, doing a data extract (to SVG) while users are in the system works, but users report that X3 performs very poorly or not at all for the duration of the SVG. The 'spinning wheel' shows on screens when attempting to open / save records.

I've tried running SVG via;

- Development->Data Extract

- Query Management DOSSVG

1. Is this common knowledge, or is there a way to run an SVG without impacting users?

2. To speed up data extract, is there a way to exclude Audit tables from the data extract (aside from running data extract for one table at a time)?