allow for garbage collection algo preference

README.md

@@ -147,6 +147,7 @@ recommended for ease of configuration.
 | `GAME_VERSION`   | Game version to serve                        | [a-zA-Z0-9_]+     | `public`      |
 | `MAP_NAMES`      | Map Names (e.g. North;South)                 | map1;map2;map3    | Muldraugh, KY |
 | `MAX_RAM`        | Maximum amount of RAM to be used             | ([0-9]+)m         | 4096m         |
+| `GC_CONFIG`      | Specifices Java GC to use                    | ([0-9]+)m         | ZGC           |
 | `STEAM_VAC`      | Use Steam VAC anti-cheat                     | (true|false) | true          |
 | `USE_STEAM`      | Create a Steam Server, or a Non-Steam Server | (true|false) | true          |
 
@@ -217,6 +218,7 @@ The following are instructions for running the server using the Docker image.
        [--env=MAP_NAMES=<value>] \
        [--env=MAX_PLAYERS=<value>] \
        [--env=MAX_RAM=<value>] \
+       [--env=GC_CONFIG=<value>] \
        [--env=MOD_NAMES=<value>] \
        [--env=MOD_WORKSHOP_IDS=<value>] \
        [--env=PAUSE_ON_EMPTY=<value>] \

docker-compose.yaml

@@ -36,6 +36,7 @@ services:
       - "MAP_NAMES=Muldraugh, KY"
       - "MAX_PLAYERS=16"
       - "MAX_RAM=4096m"
+      - "GC_CONFIG=ZGC"
       - "MOD_NAMES="
       - "MOD_WORKSHOP_IDS="
       - "PAUSE_ON_EMPTY=true"

src/run_server.sh

@@ -106,6 +106,9 @@ function apply_postinstall_config() {
 
     # Set the maximum amount of RAM for the JVM
     sed -i "s/-Xmx.*/-Xmx$MAX_RAM\",/g" "$SERVER_VM_CONFIG"
+
+    # Set the GC for the JVM (advanced, some crashes can be fixed with a different GC algorithm)
+    sed -i "s/-XX\+UseZGC.*/-XX\+Use$GC_CONFIG\",/g" "$SERVER_VM_CONFIG"
 
     printf "\n### Post Install Configuration applied.\n"
 }
@@ -188,6 +191,9 @@ function set_variables() {
 
     # Set the Maximum RAM variable
     MAX_RAM=${MAX_RAM:-"4096m"}
+
+    # Sets GC
+    GC_CONFIG=${GC_CONFIG:-"ZGC"}
 
     # Set the Mods to use from workshop
     MOD_NAMES=${MOD_NAMES:-""}