解决 Maven Jetty 启动内存溢出

1、检查内存空间大小

[root@tech_002 ~]# grep MemTotal /proc/meminfo

MemTotal: 3041772 kB

2、查看交换分区swap

[root@tech_002 home]# grep SwapTotal

/proc/meminfo SwapTotal: 2031608 kB

3、假如交换分区空间不够，可以增加

创建/home/swap这么一个分区文件。文件的大小是5120000个block，一般情况下1个block为1K，所以这里空间是5G。

dd if=/dev/zero of=/home/swap bs=1024 count=5120000

5120000+0 records in

5120000+0 records out

5242880000 bytes (5.2 GB) copied, 39.3974 seconds, 133 MB/s

接着再把这个分区变成swap分区。

[root@tech_002 home]# /sbin/mkswap /home/swap

Setting up swapspace version 1, size = 5242875 kB

然后把它加到fstab里面

[root@tech_002 home]# echo "/home/swap swap swap defaults 0 0" >> /etc/fstab ; cat /etc/fstab

/dev/VolGroup00/LogVol00 / ext3 defaults 1 1

LABEL=/boot /boot ext3 defaults 1 2

tmpfs /dev/shm tmpfs defaults 0 0

devpts /dev/pts devpts gid=5,mode=620 0 0

sysfs /sys sysfs defaults 0 0

proc /proc proc defaults 0 0

/dev/VolGroup00/LogVol01 swap swap defaults 0 0

/home/swap swap swap defaults 0 0

4、linux.net527.cn/fuwuqiyingyong/Oracle/index.html'>oracle 11g 所必须的安装包

[root@tech_002 ~]# rpm -q binutils compat-libstdc++-33 elfutils-libelf elfutils-libelf-devel glibc glibc-common glibc-devel gcc- gcc-c++ libaio-devel libaio libgcc libstdc++ libstdc++-devel make sysstat unixODBC unixODBC-devel

binutils-2.17.50.0.6-6.el5

compat-libstdc++-33-3.2.3-61

compat-libstdc++-33-3.2.3-61

elfutils-libelf-0.125-3.el5

elfutils-libelf-0.125-3.el5

elfutils-libelf-devel-0.125-3.el5

glibc-2.5-24

glibc-2.5-24

glibc-common-2.5-24

glibc-devel-2.5-24

glibc-devel-2.5-24

gcc-4.1.2-42.el5

gcc-c++-4.1.2-42.el5

libaio-devel-0.3.106-3.2

libaio-devel-0.3.106-3.2

libaio-0.3.106-3.2

libaio-0.3.106-3.2

libgcc-4.1.2-42.el5

libgcc-4.1.2-42.el5

libstdc++-4.1.2-42.el5

libstdc++-4.1.2-42.el5

libstdc++-devel-4.1.2-42.el5

make-3.81-3.el5

sysstat-7.0.2-1.el5

unixODBC-2.2.11-7.1

unixODBC-2.2.11-7.1

unixODBC-devel-2.2.11-7.1

unixODBC-devel-2.2.11-7.1

5、配置内核参数

cat >> /etc/sysctl.conf <<EOF

kernel.shmall = 2097152

kernel.shmmax = 2147483648

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

fs.file-max = 65536

net.ipv4.ip_local_port_range = 1024 65000

net.core.rmem_default = 4194304

net.core.rmem_max=4194304

net.core.wmem_default = 262144

net.core.wmem_max = 262144

EOF

然后执行

[root@tech_002 etc]# /sbin/sysctl -p

net.ipv4.ip_forward = 0

net.ipv4.conf.default.rp_filter = 1

net.ipv4.conf.default.accept_source_route = 0

kernel.sysrq = 0

kernel.core_uses_pid = 1

net.ipv4.tcp_syncookies = 1

kernel.msgmnb = 65536

kernel.msgmax = 65536

kernel.shmmax = 68719476736

kernel.shmall = 4294967296

kernel.shmall = 2097152

kernel.shmmax = 2147483648

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

fs.file-max = 65536

net.ipv4.ip_local_port_range = 1024 65000

net.core.rmem_default = 4194304

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 262144

6、给系统添加oracle用户

groupadd oinstall

groupadd dba

useradd -g oinstall -G dba oracle

passwd oracle

7、添加参数

cat >> /etc/security/limits.conf <<EOF

oracle soft nproc 2047

oracle hard nproc 16384

oracle soft nofile 1024

oracle hard nofile 65536

EOF

cat >> /etc/pam.d/login <<EOF

session required /lib/security/pam_limits.so

session required pam_limits.so

EOF

cat >> /etc/profile <<EOF

if [ $USER = "oracle" ]; then

if [ $SHELL = "/bin/ksh" ]; then

ulimit -p 16384

ulimit -n 65536

else

ulimit -u 16384 -n 65536

fi

fi

EOF

8、创建目录

mkdir -p /oracle_11/app/

chown -R oracle:oinstall /oracle_11/app/

chmod -R 755 /oracle_11/app/

sudo mkdir /oracle_11/tmp

sudo chmod a+wr /oracle_11/tmp

9、修改用户的shell

more /home/oracle/.bash_profile

# .bash_profile

umask 022

TMP=/oracle_11/tmp

TMPDIR=/oracle_11/tmp

export TMP TMPDIR

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

export ORACLE_BASE=/oracle_11/app/oracle

export ORACLE_HOME=$ORACLE_BASE/product/11.1.0/db_1

export ORA_CRS_HOME=$ORACLE_BASE/crs

export ORACLE_PATH=$ORACLE_BASE/common/oracle/sql:.:$ORACLE_HOME/rdbms/admin

export ORACLE_SID=orcl

export PATH=$ORACLE_HOME/bin:$ORA_CRS_HOME/bin:${PATH}:$HOME/bin

export PATH=${PATH}:/usr/bin:/bin:/usr/bin/X11:/usr/local/bin

export PATH=${PATH}:$ORACLE_BASE/common/oracle/bin

export ORACLE_TERM=xterm

export TNS_ADMIN=$ORACLE_HOME/network/admin

export ORA_NLS10=$ORACLE_HOME/nls/data

export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/lib:/usr/lib:/usr/local/lib:$ORACLE_HOME/oracm/lib:$ORACLE_HOME/lib

export LIBPATH=$LIBPATH:$ORA_CRS_HOME/lib:$ORACLE_HOME/lib

export CLASSPATH=${CLASSPATH}:$ORACLE_HOME/rdbms/jlib:$ORACLE_HOME/jlib:$ORACLE_HOME/network/jlib:$ORACLE_HOME/JRE

export NLS_LANG=AMERICAN_AMERICA.ZHS16G

10、用Xstart连接centos的图形界面

解压数据库文件，安装数据库

#unzip linux.x64_11gR1_database.zip

#su - oracle

$export DISPLAY=192.168.93.202:0.0

$./runInstaller