From 0d795dbf31bfd057ffb8e290a2795924455290f1 Mon Sep 17 00:00:00 2001 From: md_5 Date: Sun, 12 Jan 2014 21:07:18 +1100 Subject: [PATCH] Improve AutoSave Mechanism The problem here is that MinecraftServer.save(..), will attempt to sleep whilst all pending chunks are written to disk. however due to various and complicated bugs, it will wait for an incorrect amount of chunks, which may cause it to sleep for an overly long amount of time. Instead we will mimic the save-all command in its behaviour, which is both safe and performant. Also, only save modified chunks, or chunks with entities after 4 auto save passes diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java index bcb6683..109b657 100644 --- a/src/main/java/net/minecraft/server/Chunk.java +++ b/src/main/java/net/minecraft/server/Chunk.java @@ -936,7 +936,7 @@ public class Chunk { if (this.r && this.world.getTime() != this.lastSaved || this.q) { return true; } - } else if (this.r && this.world.getTime() >= this.lastSaved + 600L) { + } else if (this.r && this.world.getTime() >= this.lastSaved + MinecraftServer.getServer().autosavePeriod * 4) { // Spigot - Only save if we've passed 2 auto save intervals without modification return true; } diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java index 3dd4201..4c254a7 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -651,7 +651,17 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs SpigotTimings.worldSaveTimer.startTiming(); // Spigot this.methodProfiler.a("save"); this.v.savePlayers(); - this.saveChunks(true); + // Spigot Start + // We replace this with saving each individual world as this.saveChunks(...) is broken, + // and causes the main thread to sleep for random amounts of time depending on chunk activity + // Also pass flag to only save modified chunks + server.playerCommandState = true; + for (World world : worlds) { + world.getWorld().save(false); + } + server.playerCommandState = false; + // this.saveChunks(true); + // Spigot End this.methodProfiler.b(); SpigotTimings.worldSaveTimer.stopTiming(); // Spigot } diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java index 5dc77b1..62ad47d 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java @@ -726,12 +726,17 @@ public class CraftWorld implements World { } public void save() { + // Spigot start + save(true); + } + public void save(boolean forceSave) { + // Spigot end this.server.checkSaveState(); try { boolean oldSave = world.savingDisabled; world.savingDisabled = false; - world.save(true, null); + world.save(forceSave, null); // Spigot world.savingDisabled = oldSave; } catch (ExceptionWorldConflict ex) { -- 2.1.0