Last night while on Crackpack I noticed the TPS was sitting at 4 tps. I ran a profile on the server but nothing showed up. I then checked the cofh tps to see where the lag was coming from and it pointed to the deep dark. At that time I went to investigate the chunk which was being reported and found a interesting ender quarry setup. -8 magmatic dynamos -ender quarry -speed 2 upgrade -hole ungrade -enerchest -ender fluxducts -some enderio item conduits The way these were set up looked normal and I didn't think it could be a problem, I disabled this setup and instantly the TPS went from 4 to 19. I then spoke with the player about the setup and suggested he used a tesseract for power and item transfer instead of the enderchest and magmatic dynamos. After this it seemed to have fixed the tps and the rest of the night it was fine. Weird part is that his setup was the main cause of the TPS issues but it didn't show up on the profile of the server I ran.
This happens more often than you would think, I think the actual cause of this was chunk leak and the Ender Quarry storing location data in RAM, breaking the EQ caused it to free up RAM, therefore increasing tps since java now didn't have to dispose of it, it was probably a BIG enderquarry, that's why
really? that's weird, normally it'd be a ton of RAM being released so that java's garbage collector doesn't have to run so often (by stopping the server, then running, because that's how java java's), hmmm, i'll have to look into it after i fool around with recreating minecraft 1.10 in C#
Could be the combination of the items he used as well. Some mods do not play to nice together he was using like what 4-5+ different mods for that setup. Also the ender chest to send the items directly to the ME is always bad at high speeds like he was doing.