diff options
Diffstat (limited to 'Spigot-Server-Patches/0475-Set-cap-on-JDK-per-thread-native-byte-buffer-cache.patch')
-rw-r--r-- | Spigot-Server-Patches/0475-Set-cap-on-JDK-per-thread-native-byte-buffer-cache.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Spigot-Server-Patches/0475-Set-cap-on-JDK-per-thread-native-byte-buffer-cache.patch b/Spigot-Server-Patches/0475-Set-cap-on-JDK-per-thread-native-byte-buffer-cache.patch new file mode 100644 index 0000000000..5f8b1c974c --- /dev/null +++ b/Spigot-Server-Patches/0475-Set-cap-on-JDK-per-thread-native-byte-buffer-cache.patch @@ -0,0 +1,30 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Aikar <[email protected]> +Date: Mon, 4 May 2020 01:08:56 -0400 +Subject: [PATCH] Set cap on JDK per-thread native byte buffer cache + +See: https://www.evanjones.ca/java-bytebuffer-leak.html + +This is potentially a source of lots of native memory usage. + +We are clearly seeing native usage upwards to 1-4GB which doesn't make sense. + +Region File usage fixed in previous patch should of tecnically only been somewhat +temporary until GC finally gets it some time later, but between all the various +plugins doing IO on various threads, this hidden detail of the JDK could be +keeping long lived large direct buffers in cache. + +Set system properly at server startup if not set already to help protect from this. + +diff --git a/src/main/java/org/bukkit/craftbukkit/Main.java b/src/main/java/org/bukkit/craftbukkit/Main.java +index ac8f1681d91251ff84938f94fc59db97560000d6..9dd994f8b111cec2dfa30a962db8654a68c344b1 100644 +--- a/src/main/java/org/bukkit/craftbukkit/Main.java ++++ b/src/main/java/org/bukkit/craftbukkit/Main.java +@@ -20,6 +20,7 @@ public class Main { + + public static void main(String[] args) { + // Todo: Installation script ++ if (System.getProperty("jdk.nio.maxCachedBufferSize") == null) System.setProperty("jdk.nio.maxCachedBufferSize", "262144"); // Paper - cap per-thread NIO cache size + OptionParser parser = new OptionParser() { + { + acceptsAll(asList("?", "help"), "Show the help"); |