Routine Falling Blocks Cleanup

# Description A datapack that runs every half hour to determine if there is an excessive number of falling_blocks (>100). If so, kills ALL of them immediately. **_This fixes the lag, but does not address the offending mod(s) or vanillaness that caused/causes it in the first place._** This was made in response to the _Meteors_ datapack spawning a ton of slow/none(?) decaying falling_blocks - (https://modrinth.com/datapack/meteors) . I'm not smart enough to put a watch timer on the methods of Meteors to clean up the mess in response to their events firing, so you'll lag until the cleanup runs. # Background While trying to resolve a performance problem with a huge mod pack (450+), I discovered that my world had a ton of entities through the Spark mod. Not a significant number of villagers or birds or zombies, but over 3500 falling_block entities were loaded! Just look at this lovely log line: BEFORE -> <details> <summary>Spoiler</summary> : Can't keep up! Is the server overloaded? Running 29013ms or 580 ticks behind </details> Confounded by the lack of documentation on this, I fumbled around with the Internets until I discovered https://www.reddit.com/r/admincraft/comments/muw8zk/new_lag_chunk_ban_exploit_with_sand/, where the author 'blockswerker' had a helpful command for dealing with falling block exploits in their unrelated server issue. So, I fired that command into the console and my lag instantly cleared. I mean, there's a tiny bit of lag here and there, but the results are conclusive... AFTER -> <details> <summary>Spoiler</summary> : Can't keep up! Is the server overloaded? Running 4260ms or 85 ticks behind (this is also while flying around in creative loading a lot of chunks while trying to get this mod running) Also, that's nearly 85% improvement! </details> The natural thing to do is to find a mod that solved this problem. Doesn't exist. I'm running a Fabric server, so no easy scheduler mod. Then I learned about datapacks and %*I&EUY$ this was an awful experience to get working with near-zero knowledge of how this stuff works. I imagine that with minor tweaking of the embedded commands, you can back-port or forward-port this to fit your needs. It's also an acceptable (not really a scheduler) tutorial on how to reliabily run commands using a infinite timer. So, this is my first 'mod' I guess for MC. Maybe there's a better way. I hope it helps. # Install 1. Before installing, either run a Spark profiler job and check your entities count for 'falling_blocks', or you can run these commands in sequence to verify you have a large quantity of 'falling_blocks' and need this tool. a: ``` scoreboard objectives add testEntityCount dummy ``` b: ``` scoreboard players set @s testEntityCount 0 ``` c: ``` execute as @e run scoreboard players add @p testEntityCount 1 ``` d: ``` tellraw @s ``` 2A. For single player or self-hosted LAN users: place into your 'saves/<your world>/datapacks' folder 2B. For dedicated servers, place into your server World/Datapacks folder --------------------------------------------------------- # More Sauce <details> <summary>Spoiler</summary> Since Modrinth doesn't have comments or DMs, I figure some of you might be interested in the mods and settings I have. I am running Minecraft 1.21.1, on a Ryzen 5800x 128GB RAM system, paired with a 4080. That's it. I allot 12GB to Java v22 - flags are: ``` -Xms12288M -Xmx12288M -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+ParallelRefProcEnabled -XX:+PerfDisableSharedMem -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1HeapRegionSize=24M -XX:G1HeapWastePercent=5 -XX:G1MaxNewSizePercent=40 -XX:G1MixedGCCountTarget=4 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1NewSizePercent=30 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:G1ReservePercent=20 -XX:InitiatingHeapOccupancyPercent=15 -XX:MaxGCPauseMillis=200 -XX:MaxTenuringThreshold=1 -XX:SurvivorRatio=32 -Dusing.aikars.flags=https://mcflags.emc.gs -Daikars.new.flags=true ``` Fabric Mods: - abandoned: Abandoned 1.0.2 - additionalstructures: Additional Structures 5.0.1-fabric - adorabuild_structures: AdoraBuild: Structures 2.10.1 - advancednetherite: Advanced Netherite 2.2.1-1.21.1 - alternate-current: Alternate Current 1.9.0 - anvianslib: Anvian's Lib 1.1 - appleskin: AppleSkin 3.0.6+mc1.21 - architectury: Architectury 13.0.8 - areas: Areas 6.1 - armorchroma: Armor Chroma 1.2.8 - async: Async 0.1.7+alpha.3-1.21.1 - atg: Attack Through Grass 2.0.3 - athena: Athena 4.0.1 - atmosfera: Atmosfera 2.2.0+mc1.21.1 - badoptimizations: BadOptimizations 2.2.1 - balm: Balm 21.0.41 - basicweapons: Basic Weapons 2.1.1+1.21.1 - beavermod: Eager Beavers 1.3.0 - betterf1: BetterF1 1.1 - betterf3: BetterF3 11.0.3 - betterfurnacesreforged: Better Furnaces Reforged