Console logs look like this:
27.01 01:46:33 [Server] Server thread/WARN [FML]: Galacticraft Planets loaded a new chunk [-5, -11] in dimension -30 (planet.asteroids) while populating chunk [-5, -12], causing cascading worldgen lag. 27.01 01:46:33 [Server] Server thread/WARN [FML]: Please report this to the mod's issue tracker. This log can be disabled in the Forge config. 27.01 01:46:33 [Server] Server thread/WARN [FML]: Galacticraft Planets loaded a new chunk [-5, -8] in dimension -30 (planet.asteroids) while populating chunk [-5, -9], causing cascading worldgen lag. 27.01 01:46:33 [Server] Server thread/WARN [FML]: Please report this to the mod's issue tracker. This log can be disabled in the Forge config. 27.01 01:46:34 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 41% 27.01 01:46:34 [Server] Server thread/WARN [FML]: Galacticraft Planets loaded a new chunk [-2, -10] in dimension -30 (planet.asteroids) while populating chunk [-2, -11], causing cascading worldgen lag. 27.01 01:46:34 [Server] Server thread/WARN [FML]: Please report this to the mod's issue tracker. This log can be disabled in the Forge config. 27.01 01:46:35 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 59% 27.01 01:46:36 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 76% 27.01 01:46:37 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 94% 27.01 01:46:37 [Server] Server thread/INFO [Sponge]: Loading world [DIM-28] (moon.moon) 27.01 01:46:37 [Server] Server thread/INFO [minecraft/AdvancementList]: Loaded 846 advancements 27.01 01:46:37 [Server] Server thread/INFO [minecraft/AdvancementList]: Loaded 217 advancement trees
27.01 01:46:37 [Server] Server thread/INFO [Sponge]: Loading world [DIM-28] (moon.moon) 27.01 01:46:37 [Server] Server thread/INFO [minecraft/AdvancementList]: Loaded 846 advancements 27.01 01:46:37 [Server] Server thread/INFO [minecraft/AdvancementList]: Loaded 217 advancement trees 27.01 01:46:37 [Server] Server thread/INFO [twilightforest]: Loaded a world with the tfEnforcedProgression game rule not defined. Defining it. 27.01 01:46:37 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing start region for level -28 (DIM-28) 27.01 01:46:37 [Server] Server thread/WARN [FML]: Galacticraft Core loaded a new chunk [-12, -11] in dimension -28 (moon.moon) while populating chunk [-12, -12], causing cascading worldgen lag. 27.01 01:46:37 [Server] Server thread/WARN [FML]: Please report this to the mod's issue tracker. This log can be disabled in the Forge config. 27.01 01:46:38 [Server] Server thread/WARN [FML]: Galacticraft Core loaded a new chunk [-10, -11] in dimension -28 (moon.moon) while populating chunk [-11, -11], causing cascading worldgen lag. 27.01 01:46:38 [Server] Server thread/WARN [FML]: Please report this to the mod's issue tracker. This log can be disabled in the Forge config. 27.01 01:46:38 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 29% 27.01 01:46:39 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 67% 27.01 01:46:40 [Server] Server thread/INFO [minecraft/MinecraftServer]: Preparing spawn area: 90% 27.01 01:46:41 [Server] Server thread/WARN [minecraft/MinecraftServer]: Can't keep up! Did the system time change, or is the server overloaded? Running 10315ms behind, skipping 206 tick(s)