在Dble中选择wrapper作为管理dble进程的工具，其大概配置都属于固定的部分，只有其中的JVM参数是用户可以和需要通过修改来达成配置目的的 JVM参数都统一配置在以下的部分配置模块中，additional之后的标号可以根据现实情况进行添
wrapper.java.additional.1=-DDBLE_HOME=.
wrapper.java.additional.2=-server
wrapper.java.additional.3=-XX:+AggressiveOpts
wrapper.java.additional.4=-Dfile.encoding=UTF-8
wrapper.java.additional.5=-Dcom.sun.management.jmxremote
wrapper.java.additional.6=-Dcom.sun.management.jmxremote.port=1984
wrapper.java.additional.7=-Dcom.sun.management.jmxremote.authenticate=false
wrapper.java.additional.8=-Dcom.sun.management.jmxremote.ssl=false
wrapper.java.additional.9=-Dcom.sun.management.jmxremote.host=127.0.0.1
wrapper.java.additional.10=-Xmx4G
wrapper.java.additional.11=-Xms1G
wrapper.java.additional.12=-XX:MaxDirectMemorySize=2G
wrapper.java.additional.13=-XX:+PrintHeapAtGC
wrapper.java.additional.14=-XX:+PrintGCDateStamps
wrapper.java.additional.15=-Xloggc:./logs/gc_%t_%p.log
wrapper.java.additional.16=-XX:+PrintGCTimeStamps
wrapper.java.additional.17=-XX:+PrintGCDetails
wrapper.java.additional.18=-XX:+HeapDumpOnOutOfMemoryError
wrapper.java.additional.19=-XX:HeapDumpPath=./logs/
大部分以上的配置都没有特殊的意义，仅仅是一般的JVM配置，关于JVM调优的部分需要以现实情况进行操作，在此仅介绍几个特殊情况
-
MaxDirectMemorySize需要根据机器的情况进行提前适配，不然会导致服务无法正常启动 具体的细节为需要大于bufferPoolPageNumber*bufferPoolPageSize，这两个选项在server.xml中配置
bufferPoolPageNumber 的默认配置是20 × 机器CPU线程数(注意这里I5和I7的CPU可能会返回不同的结果)
bufferPoolPageSize 的默认配置是 4 × 512 ×1024
以下为建议值：
dble总内存=0.6 * 可用物理内存(刨除操作系统,驱动等的占用)
Xmx = 0.4 * dble总内存
MaxDirectMemorySize = 0.6 * dble总内存另外，在1.3_server.xml中的bufferPoolPageNumber 和bufferPoolPageSize 受MaxDirectMemorySize影响。
建议 和bufferPoolPageSize设置为2M，bufferPoolPageNumber 设置为 取整(MaxDirectMemorySize * 0.8 /bufferPoolPageSize) -
为了调试方便在debug模式下存在三个可用的XA事务调试JVM参数
-DPREPARE_DELAY=10
-DCOMMIT_DELAY=10
-DROLLBACK_DELAY = 10
单位分别是秒，当且仅当DEBUG模式下，在XA事务发生三段提交或者回滚之前会发生延迟，单位为秒
注：大部分情况下这个参数用以进行测试和本地调试
#********************************************************************
# Wrapper Properties
#********************************************************************wrapper.java.mainclas
# Java Application
wrapper.java.command=java
wrapper.working.dir=..
# Java Main class. This class must implement the WrapperListener interface
# or guarantee that the WrapperManager class is initialized. Helper
# classes are provided to do this for you. See the Integration section
# of the documentation for details.
wrapper.java.mainclass=org.tanukisoftware.wrapper.WrapperSimpleApp
set.default.REPO_DIR=lib
set.APP_BASE=.
# Java Classpath (include wrapper.jar) Add class path elements as
# needed starting from 1
wrapper.java.classpath.1=lib/wrapper.jar
wrapper.java.classpath.2=conf
wrapper.java.classpath.3=%REPO_DIR%/*
# Java Library Path (location of Wrapper.DLL or libwrapper.so)
wrapper.java.library.path.1=lib
# Java Additional Parameters
#wrapper.java.additional.1=
wrapper.java.additional.1=-DDBLE_HOME=.
wrapper.java.additional.2=-agentlib:jdwp=transport=dt_socket,server=y,address=8088,suspend=n
wrapper.java.additional.3=-server
wrapper.java.additional.4=-XX:MaxPermSize=64M
wrapper.java.additional.5=-XX:+AggressiveOpts
wrapper.java.additional.6=-Dfile.encoding=UTF-8
wrapper.java.additional.7=-Dcom.sun.management.jmxremote
wrapper.java.additional.8=-Dcom.sun.management.jmxremote.port=1984
wrapper.java.additional.9=-Dcom.sun.management.jmxremote.authenticate=false
wrapper.java.additional.10=-Dcom.sun.management.jmxremote.ssl=false
wrapper.java.additional.11=-Dcom.sun.management.jmxremote.host=127.0.0.1
wrapper.java.additional.12=-Xmx4G
wrapper.java.additional.13=-Xms1G
wrapper.java.additional.14=-XX:MaxDirectMemorySize=2G
# Initial Java Heap Size (in MB)
#wrapper.java.initmemory=3
# Maximum Java Heap Size (in MB)
#wrapper.java.maxmemory=64
# Application parameters. Add parameters as needed starting from 1
wrapper.app.parameter.1=DbleStartup
wrapper.app.parameter.2=start
#********************************************************************
# Wrapper Logging Properties
#********************************************************************
# Format of output for the console. (See docs for formats)
wrapper.console.format=PM
# Log Level for console output. (See docs for log levels)
wrapper.console.loglevel=INFO
# Log file to use for wrapper output logging.
wrapper.logfile=logs/wrapper.log
# Format of output for the log file. (See docs for formats)
wrapper.logfile.format=LPTM
# Log Level for log file output. (See docs for log levels)
wrapper.logfile.loglevel=INFO
# Maximum size that the log file will be allowed to grow to before
# the log is rolled. Size is specified in bytes. The default value
# of 0, disables log rolling. May abbreviate with the 'k' (kb) or
# 'm' (mb) suffix. For example: 10m = 10 megabytes.
wrapper.logfile.maxsize=0
# Maximum number of rolled log files which will be allowed before old
# files are deleted. The default value of 0 implies no limit.
wrapper.logfile.maxfiles=0
# Log Level for sys/event log output. (See docs for log levels)
wrapper.syslog.loglevel=NONE
#********************************************************************
# Wrapper Windows Properties
#********************************************************************
# Title to use when running as a console
wrapper.console.title=Dble-server
#********************************************************************
# Wrapper Windows NT/2000/XP Service Properties
#********************************************************************
# WARNING - Do not modify any of these properties when an application
# using this configuration file has been installed as a service.
# Please uninstall the service before modifying this section. The
# service can then be reinstalled.
# Name of the service
wrapper.ntservice.name=dble
# Display name of the service
wrapper.ntservice.displayname=Dble-server
# Description of the service
wrapper.ntservice.description=The project of Dble-server
# Service dependencies. Add dependencies as needed starting from 1
wrapper.ntservice.dependency.1=
# Mode in which the service is installed. AUTO_START or DEMAND_START
wrapper.ntservice.starttype=AUTO_START
# Allow the service to interact with the desktop.
wrapper.ntservice.interactive=false
wrapper.ping.timeout=120
configuration.directory.in.classpath.first=conf