Basic minecraft server startup script for Windows with a bunch of configurable command-line arguments and easy JVM auto-optimization. Debug mode argument set fully compatible with IDE of your choice for plugin / server development.

start_mc.cmd

@ECHO OFF
setlocal enableDelayedExpansion enableExtensions

REM @filename start_mc.cmd
REM @author loopyd &lt;<a href="mailto:[email protected]">[email protected]</a>&gt; LupineDream
REM @link <a href="https://gist.github.com/loopyd">gist.github.com/loopyd</a>
REM @description Use is always free, with credit! \
REM \
REM You may use this script at your leasure for testing purposes. \
REM \
REM You are not to remove these comments from this file if you so choose to use \
REM my code, please give credit where it is do by abiding by this simple request! \
REM Thank you~!

REM Changelog:
REM    1.0.0 initial copypasta
REM    1.0.1 fixed typos
REM    1.0.2 fix argument shifting
REM    1.0.3 fix argument validation
REM    1.1.0 added usage manual
REM    1.1.1 fix -oa flag

REM ***** Parse command line options

set "options=-jdk:"%PROGRAMFILES%\AdoptOpenJDK\jdk-8.0.212.04-hotspot\bin" -mcjar:"server.jar" -appdir:"%~dp0" -xms:"1G" -xmx:"2G" -debug: -normal: -loop: -ogc: -ot: -oc: -oa: -oof: -lru:"10000" -ccs:"2048m" -gct:"10" -gcmax:"150" -gcmin:"15" -tmax:"15" -tmin:"8" -ttarget:"90" -help: "

for %%O in (%options%) do for /f "tokens=1,* delims=:" %%A in ("%%O") do set "%%A=%%~B"
:loop
if not "%~1"=="" (
  set "test=!options:*%~1:=! "
  if "!test!"=="!options! " (
      echo. Error: Invalid option %~1
  ) else if "!test:~0,1!"==" " (
      set "%~1=t"
  ) else (
      setlocal disableDelayedExpansion
      set "val=%~2"
      call :escapeVal
      setlocal enableDelayedExpansion
      for /f delims^=^ eol^= %%A in ("!val!") do endlocal&endlocal&set "%~1=%%A" !
      shift
  )
  shift 
  goto :loop
)
goto :endArgs
:escapeVal
set "val=%val:^=^^%"
set "val=%val:!=^!%"
exit /b
:endArgs

REM ***** Validate command line options

IF DEFINED -help (
  goto :displayuse
)
IF DEFINED -debug (
  IF DEFINED -normal (
    echo. Incompatible options: -debug -normal
    set "errorflag=t"
  )
  IF DEFINED -oc (
    echo. Incompatible option: -oc
    echo. Cannot apply optimizations in debug run mode.
    set "errorflag=t"
  )
  IF DEFINED -ot (
    echo. Incompatible option: -ot
    echo. Cannot apply optimizations in debug run mode.
    set "errorflag=t"
  )
  IF DEFINED -ogc (
      echo. Incompatible option: -ogc
    echo. Cannot apply optimizations in debug run mode.
    set "errorflag=t"
  )
  IF DEFINED -oa (
      echo. Incompatible option: -oa
    echo. Cannot apply optimizations in debug run mode.
    set "errorflag=t"
  )
  IF DEFINED -oof (
    echo. Incompatible option: -oof
    echo. Cannot apply optimizations in debug run mode.
    set "errorflag=t"
  )
)

IF DEFINED -oof (
  IF DEFINED -oc (
    echo. Incompatible option: -oc
    echo. Redundant option -oc conflicts with option -oof
    set "errorflag=t"
  )
  IF DEFINED -ot (
    echo. Incompatible option: -ot
    echo. Redundant option -ot conflicts with option -oof
    set "errorflag=t"
  )
  IF DEFINED -ogc (
    echo. Incompatible option: -ogc
    echo. Redundant option -ogc conflicts with option -oof
    set "errorflag=t"
  )
  IF DEFINED -oa (
    echo. Incompatible option: -oa
    echo. Redundant option -oa conflicts with option -oof
    set "errorflag=t"
  )
  IF NOT DEFINED errorflag (
    SET "-ogc=t"
    SET "-ot=t"
    SET "-oc=t"
    SET "-oa=t"
  )
)

IF NOT DEFINED -oc (
  IF NOT "!-lru!"=="10000" (
    echo. Incompatible option: -lru 
    echo. Option -lru requires: -oc OR -oof
    set "errorflag=t"
  )
  IF NOT "!-ccs!"=="2048m" (
    echo. Incompatible option: -ccs 
    echo. Option -ccs requires: -oc OR -oof
    set "errorflag=t"
  )
)

IF NOT DEFINED -ogc (
  IF NOT "!-gct!"=="10" (
    echo. Incompatible option: -gct
    echo. Option -gct requires: -ogc OR -oof
    set "errorflag=t"
  )
  IF NOT "!-gcmax!"=="150" (
    echo. Incompatible option: -gcmax
    echo. Option -gcmax requires: -ogc OR -oof
    set "errorflag=t"
  )
  IF NOT "!-gcmin!"=="15" (
    echo. Incompatible option: -gcmin
    echo. Option -gcmin requires: -ogc OR -oof
    set "errorflag=t"
  )
)

IF NOT DEFINED -ot (
  IF NOT "!-tmin!"=="8" (
    echo. Incompatible option: -tmin
    echo. Option -tmin requires: -ot OR -oof
    set "errorflag=t"
  )
  IF NOT "!-tmax!"=="15" (
    echo. Incompatible option: -tmax
    echo. Option -tmax requires: -ot OR -oof
    set "errorflag=t"
  )
  IF NOT "!-ttarget!"=="90" (
    echo. Incompatible option: -ttarget
    echo. Option -tmin requires: -ot OR -oof
    set "errorflag=t"
  )
)

IF "!errorflag!"=="t" (
    echo.
    echo. FATAL: Cannot continue, displaying help
    echo.
    goto :displayuse
)

REM ***** Set JVM params
set "B_JAVA_HOME=!JAVA_HOME!"
set "B_APP_HOME=!APP_HOME!"
set "JAVA_HOME=!-jdk!"
set "APP_HOME=!-appdir!"

REM ***** Main
:serverloop
echo.
echo. ---------------------------------------------------------------------------
echo. JDK Home Directory: !-jdk!
echo. Running in directory: !-appdir!
IF DEFINED -debug (
  echo. Mode:    Debug
) ELSE (
  echo. Mode:    Normal
)
echo. ---------------------------------------------------------------------------
call :runserver
echo.
IF DEFINED -loop (
  echo. -----------------------------------------------------------------------
  echo. Loop mode active, the server will restart in 5 seconds.
  echo. Press Q to cancel this operation and quit the script.
  echo. -----------------------------------------------------------------------
  choice /N /T 5 /C QC /D C >nul
  IF !ERRORLEVEL! EQU 1 GOTO :serverdone
  IF !ERRORLEVEL! EQU 2 GOTO :serverloop
) else (
  echo. JVM process exited
  echo. -----------------------------------------------------------------------
)

:serverdone
set "JAVA_HOME=!B_JAVA_HOME!"
set "APP_HOME=!B_APP_HOME!"
echo.
echo. Thanks for using start_mc.cmd !
echo.
goto :eof

:runserver

set "runstr="%JAVA_HOME%\java.exe""

IF DEFINED -debug (
  set "runstr=!runstr! -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005"
  set "runstr_str=echo. Starting Minecraft JVM with remote debugger socket (IntelliJ, atom, etc)..."
) ELSE IF DEFINED -normal (
  set "runstr=!runstr! -server"
  set "runstr_str=echo. Starting Minecraft JVM in server/production mode..."
) ELSE (
  set "runstr=!runstr! -server"
  set "runstr_str=echo. Starting Minecraft JVM in default mode..."
)

set "runstr=!runstr! -Xms!-xms! -Xmx!-xmx!"

IF DEFINED -ogc (
  set "runstr=!runstr! -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:MaxGCPauseMillis=!-gcmin! -XX:GCPauseIntervalMillis=!-gcmax! -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:ParallelGCThreads=!-gct!"
)

IF DEFINED -oc (
  set "runstr=!runstr! -XX:ReservedCodeCacheSize=!-ccs! -XX:+UseCodeCacheFlushing -XX:SoftRefLRUPolicyMSPerMB=!-lru!"
)

IF DEFINED -ot (
  set "runstr=!runstr! -XX:+UseNUMA -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=!-tmin! -XX:TargetSurvivorRatio=!-ttarget! -XX:MaxTenuringThreshold=!-tmax!"
)

IF DEFINED -oa (
  set "runstr=!runstr! -XX:+UseBiasedLocking -XX:+UseFastAccessorMethods -XX:+UseCompressedOops -XX:+OptimizeStringConcat -XX:+AggressiveOpts -Dfml.ignorePatchDiscrepancies=true -Dfml.ignoreInvalidMinecraftCertificates=true"
)
set "runstr=!runstr! -jar "!APP_HOME!\!-mcjar!" nogui"

!runstr_str!
!runstr!

set "runstr="
set "runstr_str="
exit /b

:displayuse
echo. start_mc - Easily start your minecraft server!
echo.
echo. version:   1.1.1
echo. author:    loopyd ^<[email protected]^> 
echo.
echo.     Usage: start_mc.cmd { Start options } { Path options } { Memory allocation options } 
echo.                         { Optimization options } { ...Tweakers paradise... }
echo.
echo.     Start options:
echo.
echo.         -debug   Starts the server with a JVM remote debugger attached for your favorite IDE.
echo.                  Cannot be used with -normal
echo.         -normal  Starts the server with a normal set of production arguments
echo.                  Cannot be used with -debug
echo.         -loop    Forces the server into a loop, at the end of the loop, the user gains the option
echo.                  to cancel out of the loop within 5 seconds by pressing CTRL+C.
echo.
echo.     Path options:
echo.
echo.         -jdk:"path"       Specify a path to your jdk runtime executable using this option.
echo.                           Default: "^%PROGRAMFILES^%\AdoptOpenJDK\jdk-8.0.212.04-hotspot\bin"
echo.         -mcjar:"file.jar" Specify the name of your minecraft server jar 
echo.                           Default: "server.jar"
echo.         -appdir:"path"    Specify the directory where your server's files are stored.
echo.                           The default is the current directory.
echo.
echo.     Memory allocation options:
echo.
echo.         -xms:"value"      How much memory the JVM should allocate at the minimum.
echo.                           Default: "1G"
echo.         -xmx:"value"      How much memory the JVM should allocate at the maximum.
echo.                           Default: "2G"
echo.
echo.     Optimization options:
echo.         -ogc     Will start Minecraft with optimized garbage collector.
echo.         -ot      Will start Minecraft with NUMA Tenuring optimizations.
echo.         -oc      Will start Minecraft with caching optimizations.
echo.         -oa      Will start Minecraft with some additional JVM optimizations (misc.)
echo.         -oof     Will start Minecraft with all optimizations!
echo.                  Has the same effect as "-ogc -ot -oc -oa".
echo.
echo. ************************************** TWEAKERS PARADISE ******************************************
echo.
echo.     These options have conveniently set defaults.  However, if you're a tweaker, I've got you
echo.                  covered with overrides.  Let those endless forum arguments continue !
echo.
echo.     Garbage collector optimization tweaks:                                          ( -ogc option )
echo.         -gct:"value"      Garbage collector threads
echo.                           Default: "10"
echo.         -gcmin:"value"    Minimum interval (in milliseconds) between garbage collector checks.
echo.                           Default: "15"
echo.         -gcmax:"value"    Maxmimum interval (in milliseconds) between forced cleanups.
echo.                           Default: "150"
echo.
echo.     Cache optimization tweaks:                                                      ( -oc option  )
echo.         -lru:"value"      Soft-reference LRU policy
echo.                           Default: "10000"
echo.         -ccs:"value"      Code cache prerequisate size
echo.                           Default: "2048m"
echo.
echo.     Tenuring optimization tweaks:                                                   ( -ot option  )
echo.         -tmin:"value"    Minimum tenuring survival ratio
echo.                          Default: "8"
echo.         -tmax:"value"    Maximum tenuring survival ratio
echo.                          Default: "15"
echo.         -ttarget:"value" Target tenuring survival slice (percentage)
echo.                          Default: "90"
echo.
echo. *************************************************************************************************   
echo. 
echo. This script was designed in a hurry!  Please forgive any bugs.  Its intent is to provide an easy
echo. solution for developers and homebrew Minecraft server admins.  It has not been tested in a
echo. production environment, but probably provides everything you'd damn well need to.
echo.
echo. I am not responsible for any damages that may incur *emotional or otherwise :^^)* for the use
echo. of this script.  Please keep your diamond swords out of my nether portal, its not kosher!
echo.
echo. Luv,
echo.    ~HeavyPaws
echo.
echo. Usage manual                                                                          End of file.
echo.
goto :eof


:eof
exit