When the server has like 18 players, auto-saving freezes all the player. And I think saving every 10 minutes is too frequent. Auto-save is a good feature but It's too much.
I could see 15, but keep in mind it is a modpack in an unstable environment and is prone to crashes, would you rather risk losing and having to redo 10 minutes of work, or 30?
The autosaves aren't really the issue. It is one of the mods data it tries to save causing the issue. We have opened issues with the mod authors to solve this. Sporefreak is correct on what he says.
i would at this point rather lose the data, its getting worse every time it happens. As a temporary fix, can we possibly reduce significantly the amount of saves that occur, before the server restarts again. When the auto-save starts, for the next 1-3 min. you are completely frozen, and with that happening every 5 min. is ruining the game.
Does this issue happen on both nodes now? I did see it only on node 1. How many players are online when it takes that long? Any specific player who is always online when it takes so long but not online during fast saves? Right now there are 8 players on node 2 and it takes 13 seconds.