fps spikes and freezing after last maintenance

has anyone else experienced this since last maintenance? or before it.

normally my wife's tree of savior would work just fine, but for a while it was starting to freeze slightly, and with last maintenance it got far worse, sometimes needing to fully restart the client to start working again.

memory wise everything seems to be ok, but disk wise it seems the tos client is writing alot of data into the disk compared to the usual ammount.

anyone knows what could be causing this or how it could be fixed?

http://i.imgur.com/AT1dije.png