From 56bda46ddd9202d7d5485792fc2062fc69b6ed07 Mon Sep 17 00:00:00 2001
From: Greg Burri <greg.burri@gmail.com>
Date: Wed, 30 Jun 2021 08:29:28 +0200
Subject: [PATCH] Adjust the reported memory from the java process.

---
 Cargo.lock                          | 14 ++++++++++----
 backend/src/minecraft_controller.rs |  2 +-
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index a370b18..b2fdbf9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -526,7 +526,7 @@ dependencies = [
  "cached_proc_macro",
  "cached_proc_macro_types",
  "futures",
- "hashbrown",
+ "hashbrown 0.9.1",
  "once_cell",
 ]
 
@@ -988,6 +988,12 @@ version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
 
+[[package]]
+name = "hashbrown"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -1059,12 +1065,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.6.2"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "824845a0bf897a9042383849b02c1bc219c2383772efcd5c6f9766fa4b81aef3"
+checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
 dependencies = [
  "autocfg",
- "hashbrown",
+ "hashbrown 0.11.2",
 ]
 
 [[package]]
diff --git a/backend/src/minecraft_controller.rs b/backend/src/minecraft_controller.rs
index 8b06f66..7af13dd 100644
--- a/backend/src/minecraft_controller.rs
+++ b/backend/src/minecraft_controller.rs
@@ -144,7 +144,7 @@ pub fn get_minecraft_executable_information(world_path: &str, backup_path: &str,
 
         Some(
             MinecraftExe {
-                memory: process.memory(),
+                memory: process.memory() / 3, // Because the Java garbage collector ZGC reports three times more the real memory usage: https://stackoverflow.com/a/62934057/212675
                 load_average_5min: system.get_load_average().five / system.get_processors().len() as f64 * 100.,
                 uptime: std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_secs() - process.start_time(),
                 world_size,
-- 
2.43.0