I'm running Regionerator on Paper 1.16.5, it ran on a 72gb world, but the size of the world hasn't changed. (I have seen the size from online panels and ubuntu commands)
This is the log since the plugin was loaded
[21:45:05] [Server thread/INFO]: [Regionerator] Enabling Regionerator v2.3.0
[21:45:05] [Server thread/WARN]: [Regionerator] Loaded class com.sk89q.worldguard.protection.regions.ProtectedRegion from WorldGuard v7.0.4+f7ff984 which is not a depend, softdepend or loadbefore of this plugin.
[21:45:05] [Server thread/WARN]: [Regionerator] Loaded class com.sk89q.worldedit.math.BlockVector3 from FastAsyncWorldEdit v1.16-581;dd65cff which is not a depend, softdepend or loadbefore of this plugin.
[21:45:05] [Server thread/INFO]: [Regionerator] Enabled protection hook for WorldGuard
[21:45:05] [Server thread/INFO]: [Regionerator] Deletion run scheduled for world
[21:45:05] [Server thread/INFO]: world: checked 0, deleted 0 regions & 0 chunks
[21:45:05] [Server thread/INFO]: Cycle for world_the_end is ready to start.
[21:45:05] [Server thread/INFO]: Cycle for world_nether is ready to start.
[21:45:05] [Server thread/INFO]: TheNithEga issued server command: /back
[21:45:07] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 200, deleted 5 regions & 1193 chunks
[21:45:07] [Async Chat Thread - #180/INFO]: ? Saint_Nick12 ?
[21:45:07] [Async Chat Thread - #180/INFO]: DoggoDelWakkanda ? no
[21:45:08] [Server thread/INFO]: CM_ENIMOLZ_TROL issued server command: /cmi tpaccept EdoFishy
[21:45:08] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 320, deleted 5 regions & 3274 chunks
[21:45:08] [Server thread/INFO]: itz_thomm issued server command: /donate Gxbbx
[21:45:08] [Server thread/INFO]: Heron4gf issued server command: /regionerator resume
[21:45:08] [Server thread/INFO]: lorienzooooo_08 issued server command: /home
[21:45:09] [Server thread/INFO]: Gxbbx issued server command: /cmi donate accept itz_thomm
[21:45:10] [Server thread/INFO]: TheNithEga issued server command: /home CheCasa
[21:45:11] [Async Chat Thread - #180/INFO]: DoggoDelWakkanda ? gperche??
[21:45:13] [Server thread/INFO]: 2 2
[21:45:13] [Async Chat Thread - #180/INFO]: ? BlackSturm_ ?
[21:45:13] [Server thread/INFO]: Heron4gf issued server command: /regionerator
[21:45:14] [Server thread/INFO]: FireOnMinecraft issued server command: /back
[21:45:14] [Server thread/INFO]: dumbotro issued server command: /shop
[21:45:15] [Server thread/INFO]: Saint_Nick12 issued server command: /dvote difficile
[21:45:15] [Server thread/INFO]: lorienzooooo_08 lost connection: Disconnected
[21:45:15] [Server thread/INFO]: [-] lorienzooooo_08
[21:45:16] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 1300, deleted 24 regions & 6804 chunks
[21:45:17] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 1420, deleted 27 regions & 7126 chunks
[21:45:18] [Async Chat Thread - #180/INFO]: ? Saint_Nick12 ?
[21:45:19] [Server thread/INFO]: alberosaggio issued server command: /dispose
[21:45:20] [Server thread/INFO]: Heron4gf issued server command: /regionerator
[21:45:20] [Server thread/INFO]: mrkewinyt issued server command: /dvote normale
[21:45:22] [Server thread/INFO]: itz_thomm issued server command: /dvote difficile
[21:45:22] [Server thread/INFO]: Heron4gf issued server command: /spark tps
[21:45:23] [Async Chat Thread - #180/INFO]: ? BlackSturm_ ?
[21:45:24] [Server thread/INFO]: alberosaggio issued server command: /shop
[21:45:27] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 2460, deleted 46 regions & 10488 chunks
[21:45:27] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 2480, deleted 47 regions & 10488 chunks
[21:45:27] [Server thread/INFO]: [ShopGUIPlus] alberosaggio sold all 18 x Diorite for $36 to blocks shop
[21:45:28] [Server thread/INFO]: [ShopGUIPlus] alberosaggio sold all 50 x Andesite for $100 to blocks shop
[21:45:30] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 2800, deleted 51 regions & 12666 chunks
[21:45:30] [Server thread/INFO]: Saint_Nick12 issued server command: /back
[21:45:31] [User Authenticator #256/INFO]: UUID of player lorienzooooo_08 is ab21c2d5-7e30-316e-8458-b0303c1e1cc3
[21:45:31] [Server thread/INFO]: lorienzooooo_08[/185.11.195.245:41130] logged in with entity id 29763541 at ([world]-29938.720980198832, 73.0, 34748.672221622575)
[21:45:32] [Server thread/INFO]: alberosaggio issued server command: /shop
[21:45:34] [Server thread/INFO]: Heron4gf issued server command: /spark tps
[21:45:35] [Server thread/INFO]: itz_thomm issued server command: /rt world
[21:45:36] [Server thread/INFO]: [ShopGUIPlus] alberosaggio sold all 52 x Redstone for $156 to minerali shop
[21:45:36] [Server thread/INFO]: [Matrix] EdoFishy is phase into block (Phase)
[21:45:36] [Server thread/INFO]: Heron4gf issued server command: /regionerator
[21:45:36] [Server thread/INFO]: [Matrix] EdoFishy is phase into block (Phase) #2
[21:45:37] [Server thread/INFO]: DoggoDelWakkanda issued server command: /rt world
[21:45:40] [Server thread/INFO]: alberosaggio issued server command: /home
[21:45:46] [Server thread/INFO]: Franze issued server command: /shop
[21:45:48] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? BlackSturm_ 1v1 come ti ho detto si o no non ne do possibilit? simili
[21:45:49] [Async Chat Thread - #180/INFO]: BlackSturm_ ? [item] vendo
[21:45:49] [Server thread/INFO]: [ShopGUIPlus] Franze sold all 1293 x Sugar Cane for $1,293 to food shop
[21:45:53] [Server thread/INFO]: Heron4gf issued server command: /regionerator
[21:45:54] [Server thread/INFO]: mrkewinyt issued server command: /back
[21:45:54] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 5460, deleted 92 regions & 27101 chunks
[21:45:56] [Async Chat Thread - #180/INFO]: BlackSturm_ ? arenapvp.
[21:45:58] [Server thread/INFO]: BlackSturm_ issued server command: /warp arenapvp
[21:45:59] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 5920, deleted 99 regions & 28917 chunks
[21:46:00] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 6100, deleted 108 regions & 29655 chunks
[21:46:00] [Server thread/INFO]: [Matrix] EdoFishy is phase into block (Phase)
[21:46:01] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? no
[21:46:02] [Server thread/INFO]: itz_thomm issued server command: /tpahere Gxbbx
[21:46:03] [Async Chat Thread - #180/INFO]: BlackSturm_ ? chiarenapvp
[21:46:04] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 6500, deleted 115 regions & 31294 chunks
[21:46:05] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? o rt o nulla
[21:46:09] [Server thread/INFO]: TheNithEga issued server command: /msg DoggoDelWakkanda te la incanto se mi dici il nuovo metodo di soldi
[21:46:09] [Async Chat Thread - #180/INFO]: BlackSturm_ ? nulla
[21:46:13] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 7460, deleted 130 regions & 34658 chunks
[21:46:13] [Server thread/INFO]: [Matrix] EdoFishy is phase into block (Phase) #2
[21:46:14] [Server thread/INFO]: DoggoDelWakkanda issued server command: /r gia fatto
[21:46:15] [Server thread/INFO]: CM_ENIMOLZ_TROL issued server command: /rt world
[21:46:15] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 7700, deleted 136 regions & 36064 chunks
[21:46:16] [Async Chat Thread - #180/INFO]: BlackSturm_ ? non mi faccio fottere di nuovo
[21:46:18] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 7960, deleted 139 regions & 38214 chunks
[21:46:19] [Server thread/INFO]: gabrox issued server command: /home
[21:46:20] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 8160, deleted 147 regions & 39147 chunks
[21:46:20] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 8180, deleted 148 regions & 39147 chunks
[21:46:20] [Server thread/INFO]: TheNithEga issued server command: /msg DoggoDelWakkanda ok
[21:46:25] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? conta che se ti killo ti rid? il loot e sei mio ally dato che hai fatto pvp onesto
[21:46:27] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 8860, deleted 166 regions & 42052 chunks
[21:46:28] [Server thread/INFO]: FireOnMinecraft issued server command: /msg BlackSturm_ vacci nudo
[21:46:28] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 8980, deleted 168 regions & 44591 chunks
[21:46:29] [Server thread/INFO]: DoggoDelWakkanda issued server command: /tpahere Saint_Nick12
[21:46:36] [Server thread/INFO]: TheNithEga issued server command: /home farm
[21:46:37] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 9940, deleted 189 regions & 51956 chunks
[21:46:38] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? se invece non lo vuoi fare allora rip
[21:46:39] [Server thread/INFO]: DoggoDelWakkanda issued server command: /cmi tpahere Saint_Nick12 -cancel-
[21:46:39] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 10160, deleted 195 regions & 54311 chunks
[21:46:40] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 10220, deleted 197 regions & 54362 chunks
[21:46:42] [Async Chat Thread - #180/INFO]: BlackSturm_ ? NO
[21:46:43] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 10540, deleted 205 regions & 55465 chunks
[21:46:45] [Async Chat Thread - #180/INFO]: BlackSturm_ ? mi hai gia ucciso in 2v1
[21:46:48] [Async Chat Thread - #180/INFO]: BlackSturm_ ? se volevi facevi 1v1
[21:46:49] [Async Chat Thread - #180/INFO]: BlackSturm_ ? non 2v1
[21:46:50] [User Authenticator #257/INFO]: UUID of player XxPiedino1kMxX is e03c6440-fb17-3e7b-98e8-83cf722230b5
[21:46:50] [Server thread/INFO]: XxPiedino1kMxX[/185.116.2.60:41160] logged in with entity id 29818014 at ([world]-54323.69999998808, 12.0, -68052.85424707232)
[21:46:50] [Async Chat Thread - #180/INFO]: ELITE *GFireG ? Saint_Nick12 parole sante che poi non si rispettano
[21:46:51] [Async Chat Thread - #180/INFO]: EdoFishy ? ao chi cazzo scambia un ripristino mannaggia a nico
[21:46:51] [Server thread/INFO]: gabrox issued server command: /shop
[21:46:52] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? vuoi che esce mrkewinyt?
[21:46:54] [Server thread/INFO]: [ShopGUIPlus] gabrox sold all 320 x Lapis Lazuli for $1,280 to minerali shop
[21:46:58] [Async Chat Thread - #180/INFO]: DoggoDelWakkanda ? io EdoFishy
[21:46:59] [Async Chat Thread - #180/INFO]: BlackSturm_ ? questo dimostra quanto sei sleale d Saint_Nick12.
[21:46:59] [Async Chat Thread - #180/INFO]: XxPiedino1kMxX ? io edo
[21:47:00] [Server thread/INFO]: gabrox issued server command: /shop
[21:47:01] [Async Chat Thread - #180/INFO]: BlackSturm_ ? questo dimostra quanto sei sleale d Saint_Nick12.
[21:47:01] [Server thread/INFO]: itz_thomm issued server command: /msg XxPiedino1kMxX vendi mending?
[21:47:02] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 12500, deleted 242 regions & 68344 chunks
[21:47:03] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 12580, deleted 244 regions & 68592 chunks
[21:47:03] [Server thread/INFO]: [ShopGUIPlus] gabrox sold all 80 x Lapis Lazuli for $320 to minerali shop
[21:47:06] [Server thread/INFO]: dumbotro issued server command: /shop
[21:47:07] [Server thread/INFO]: BlackSturm_ issued server command: /rt world
[21:47:08] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 13060, deleted 252 regions & 69899 chunks
[21:47:09] [Server thread/INFO]: TheNithEga issued server command: /back
[21:47:09] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? BlackSturm_ vuoi fare un 2v2?
[21:47:10] [Async Chat Thread - #180/INFO]: DoggoDelWakkanda ? devi aspettare mi sto facendo 100k
[21:47:12] [Async Chat Thread - #180/INFO]: XxPiedino1kMxX ? si thomm
[21:47:16] [Server thread/INFO]: BlackSturm_ issued server command: /home
[21:47:18] [Server thread/INFO]: gabrox issued server command: /shop
[21:47:19] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 14100, deleted 270 regions & 74994 chunks
[21:47:19] [Async Chat Thread - #180/INFO]: BlackSturm_ ? con chi cazzo?
[21:47:20] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 14200, deleted 274 regions & 75077 chunks
[21:47:20] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 14280, deleted 277 regions & 75305 chunks
[21:47:21] [Server thread/INFO]: EdoFishy issued server command: /msg DoggoDelWakkanda cosa vuoi per ripristino
[21:47:22] [Server thread/INFO]: [ShopGUIPlus] gabrox sold all 245 x Redstone for $735 to minerali shop
[21:47:22] [Server thread/INFO]: FireOnMinecraft issued server command: /dispose
[21:47:22] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? io e mrkewinyt contro tu e FireOnMinecraft
[21:47:25] [Server thread/INFO]: itz_thomm issued server command: /msg XxPiedino1kMxX 10 diamanti come sempre?
[21:47:27] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 14900, deleted 290 regions & 76823 chunks
[21:47:29] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 15160, deleted 294 regions & 79311 chunks
[21:47:30] [Server thread/INFO]: dumbotro lost connection: Disconnected
[21:47:30] [Server thread/INFO]: [-] dumbotro
[21:47:30] [Server thread/INFO]: DoggoDelWakkanda issued server command: /r lo vendo a 1.5k
[21:47:30] [Async Chat Thread - #180/INFO]: BlackSturm_ ? no poi mi fate un orgia contro
[21:47:32] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? FireOnMinecraft tanto tu non mi killerai mai HAHAH
[21:47:32] [Server thread/INFO]: Spawned KillAura Npc for EdoFishy (100 ticks)
[21:47:34] [Server thread/INFO]: XxPiedino1kMxX issued server command: /msg itz_thomm si quanti ne voui?
[21:47:35] [Async Chat Thread - #180/INFO]: ELITE *GFireG ? xol cazzo
[21:47:36] [User Authenticator #257/INFO]: UUID of player EpicProttolo is 96071af0-98a1-420e-a8e3-dd441898f0eb
[21:47:36] [Server thread/INFO]: EpicProttolo[/178.19.145.75:41178] logged in with entity id 29898731 at ([pvp]-141.42708321753886, 53.0, -559.6103950355571)
[21:47:41] [Async Chat Thread - #180/INFO]: ELITE *gMonocicloBenz_ ? ma se ho killato a FireOnMinecraft HAHAH
[21:47:44] [Server thread/INFO]: itz_thomm issued server command: /msg XxPiedino1kMxX aspe che ne trovo altri e te li do
[21:47:47] [Async Chat Thread - #180/INFO]: EdoFishy ? ne prendo 3 doggo
[21:47:48] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 17020, deleted 330 regions & 90829 chunks
[21:47:49] [Server thread/INFO]: BlackSturm_ issued server command: /msg EpicProttolo fra tengo ancora mezzo server contro ;C
[21:47:51] [Server thread/WARN]: il_pazzone was kicked for floating too long!
[21:47:51] [Server thread/INFO]: il_pazzone lost connection: Flying is not enabled on this server
[21:47:52] [Server thread/INFO]: [-] il_pazzone
[21:47:52] [Server thread/INFO]: XxPiedino1kMxX issued server command: /msg itz_thomm quanti ne prendi
[21:47:55] [User Authenticator #257/INFO]: UUID of player il_pazzone is bcc591f9-6edb-44c1-86bb-0158c4235bd2
[21:47:55] [Server thread/INFO]: Gloax_YT issued server command: /lock 2 lorienzooooo_08
[21:47:55] [Server thread/INFO]: EdoFishy issued server command: /home
[21:47:55] [Server thread/INFO]: il_pazzone[/93.45.89.215:41196] logged in with entity id 29948577 at ([world]-46422.925813668575, 23.0, 52886.871013765965)
[21:47:56] [Server thread/INFO]: TheNithEga issued server command: /anvil
[21:47:57] [Async Chat Thread - #180/INFO]: ELITE *GFireG ? Saint_Nick12 zitta puttanella
[21:47:57] [Server thread/INFO]: BlackSturm_ issued server command: /R cmq uno di loro due tiene il tuo pick
[21:47:58] [Server thread/INFO]: EdoFishy issued server command: /spawn
[21:47:59] [Server thread/INFO]: FireOnMinecraft issued server command: /back
[21:48:01] [Server thread/INFO]: BlackSturm_ issued server command: /r io tengo solo il mio [item]
[21:48:02] [Server thread/INFO]: XxPiedino1kMxX issued server command: /msg EdoFishy a quanto te li fa doggo??
[21:48:02] [Server thread/INFO]: itz_thomm issued server command: /msg XxPiedino1kMxX almeno 1 stack
[21:48:06] [Server thread/INFO]: TheNithEga issued server command: /warp Farm
[21:48:07] [Async Chat Thread - #180/INFO]: ELITE *ErPazzone ? lag
[21:48:08] [Async Chat Thread - #180/INFO]: DoggoDelWakkanda ? oof
[21:48:11] [Server thread/INFO]: EpicProttolo issued server command: /r hai un armor?
[21:48:11] [Server thread/INFO]: gabrox issued server command: /donate DoggoDelWakkanda
[21:48:12] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] world: checked 19340, deleted 362 regions & 103954 chunks
[21:48:12] [Server thread/INFO]: XxPiedino1kMxX issued server command: /msg itz_thomm quanti mending preparo?
[21:48:13] [Async Chat Thread - #180/INFO]: ELITE *HELLO ? chi ha ripr?
[21:48:13] [Craft Scheduler Thread - 3170 - Regionerator/INFO]: [Regionerator] Regeneration cycle complete for world: checked 19488, deleted 363 regions & 104017 chunks
[21:48:13] [Async Chat Thread - #180/INFO]: EdoFishy ? a 1500