PaperMC/patches/server/0077-Sanitise-RegionFileCache-and-make-configurable.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Antony Riley <antony@cyberiantiger.org>
Date: Tue, 29 Mar 2016 08:22:55 +0300
Subject: [PATCH] Sanitise RegionFileCache and make configurable.
RegionFileCache prior to this patch would close every single open region
file upon reaching a size of 256.
This patch modifies that behaviour so it closes the the least recently
used RegionFile.
The implementation uses a LinkedHashMap as an LRU cache (modified from HashMap).
The maximum size of the RegionFileCache is also made configurable.
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
index eaf22cec54b512e0f57606f50627d5fe9b39bd5c..5a35e5040726a981ae91f018f05b91c178a54ba0 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
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@@ -36,7 +36,7 @@ public class RegionFileStorage implements AutoCloseable {
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if (regionfile != null) {
return regionfile;
} else {
- if (this.regionCache.size() >= 256) {
+ if (this.regionCache.size() >= io.papermc.paper.configuration.GlobalConfiguration.get().misc.regionFileCacheSize) { // Paper - configurable
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((RegionFile) this.regionCache.removeLast()).close();
}