Supposedly it's an issue with a logging (not sure if archiving or wood chopping type of logging tho) mod. Silverleaf is encountering the same issue, but besides restarting the run without that mod, our glorious admin hasn't found another solution.
Is there any additional information available? The only "logging" as in "archiving" mod I know is Chronicler and that works fine on all five official servers without issues - that doesn't use the game db for any saving, though and hence couldn't explain OPs "database is growing very quickly" thing. Custom mod?