ActivityPods、気になってはいるのだけど、これが怖くて足がすくんでいる（？）
https://docs.activitypods.org/tutorials/deploy-your-own-pod-provider/#maintainance
> It is required to regularly compact the datasets generated by Fuseki, otherwise they may grow very large. Unfortunately, due to the extension we developed to handle WAC permissions, it is required to stop Fuseki, compact it and launch it again.