papermc/patches/server/0825-Do-not-overload-I-O-threads-with-chunk-data-while-fl.patch
Finn Künstner a284e40c70
Updated Upstream (Bukkit/CraftBukkit) (#6848)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
9b45fa2f #667: Allow setting BrewEvent results
8c776ddc SPIGOT-6762: ChatPaginator.wordWrap only transfers one modifier
da372966 SPIGOT-4590, SPIGOT-6769: Clarify DamageCause documentation

CraftBukkit Changes:
cef1fda3 #947: Add missing spawn eggs for SpawnEggMeta
eb9a0f34 #945: Allow setting BrewEvent results
2021-10-31 08:34:10 +01:00

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2.3 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sat, 16 Oct 2021 01:36:00 -0700
Subject: [PATCH] Do not overload I/O threads with chunk data while flush
saving
If the chunk count is high, then the memory used by the
chunks adds up and could cause problems. By flushing
every so many chunks, the server will not become
stressed for memory. It will also not increase the total
time to save, as flush saving performs a full flush at
the end anyways.
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 4b1797659f6bb5913b105641ecaac38954ce8bc0..65090afbb510231c05db3132ba416502d188f1c0 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -950,6 +950,16 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
// Paper end
protected void saveAllChunks(boolean flush) {
+ // Paper start - do not overload I/O threads with too much work when saving
+ int[] saved = new int[1];
+ int maxAsyncSaves = 50;
+ Runnable onChunkSave = () -> {
+ if (++saved[0] >= maxAsyncSaves) {
+ saved[0] = 0;
+ com.destroystokyo.paper.io.PaperFileIOThread.Holder.INSTANCE.flush();
+ }
+ };
+ // Paper end - do not overload I/O threads with too much work when saving
if (flush) {
List<ChunkHolder> list = (List) this.updatingChunks.getVisibleValuesCopy().stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).collect(Collectors.toList()); // Paper
MutableBoolean mutableboolean = new MutableBoolean();
@@ -972,6 +982,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}).filter((ichunkaccess) -> {
return ichunkaccess instanceof ImposterProtoChunk || ichunkaccess instanceof LevelChunk;
}).filter(this::save).forEach((ichunkaccess) -> {
+ onChunkSave.run(); // Paper - do not overload I/O threads with too much work when saving
mutableboolean.setTrue();
});
} while (mutableboolean.isTrue());