Some days ago I started a new server with Buildcraft 7, we have the issue now that always when the quarry sees fluids especially on oil the server starts lagging like hell, and the quarry is continuing destroying blocks but shows no animation anymore.

Would be good if it could be investigated, we use Buildcraft 7.0.8.

Weired thing is that the cpu and memory usage of the server is quite okay, but my memory usage went up to 100% of the client (500/500mb).

It is really weired, updated to 7.0.9, had no laggs today until the quarry reached this lava field:
http://pictures.esc-clan.net/upload2/lag.png

Since than it is quite laggy (even if i turn of the quarry), the used server ressources are still quite low.

I think maybe not the lava field is the reason, it could be more a nearby cruid oil field.

Yeah found out its definitly the case as soon as it hids the crude oil reservous its starting to lagg heavily.

This cruid oil stuff seeming to be like small caves with lots of oil, if a quarrie hits them the oil get spread over all the quarry size and this is causing the extreme laggs it seems like.

I think it can be closed here as I don't think the BC authors can do anything about this issue except letting wall around the oil resservous which would be a dirty solution^^.