11gR2 Installation on RHEL 5

	11gR2 Installation on RHEL 5
No	Steps	Details
	Hardware Requirement
1	Atleast 4 GB RAM is required	grep MemTotal /proc/meminfo
2	Swap Space	grep SwapTotal /proc/meminfoPropotional to the sysem’s physical RAM 8 to 32GB = 1.5*RAM
3	Disk Space Requirement	1. 1024 MB in /tmp - 2. Approx.4.4 GB of disk space for the oracle software 3. 1.7 GB for the preconfigured Database(optional)
	Kernal Requirement
1	System should be running in following kernal version or more than that 2.6.18-92	uname -r
	Installing Required Packages
1	Make sure installing all the packages including the dependanace packages	binutils-2.17.50.0.6 compat-libstdc++-33-3.2.3 compat-libstdc++-33-3.2.3 (32 bit) elfutils-libelf-0.125 elfutils-libelf-devel-0.125 gcc-4.1.2 gcc-c++-4.1.2 glibc-2.5-24 glibc-2.5-24 (32 bit) glibc-common-2.5 glibc-devel-2.5 glibc-devel-2.5 (32 bit) glibc-headers-2.5 ksh-20060214 libaio-0.3.106 libaio-0.3.106 (32 bit) libaio-devel-0.3.106 libaio-devel-0.3.106 (32 bit) libgcc-4.1.2 libgcc-4.1.2 (32 bit) libstdc++-4.1.2 libstdc++-4.1.2 (32 bit) libstdc++-devel 4.1.2 make-3.81 numactl-devel-0.9.8.x86_64 sysstat-7.0.2
	Set Kernal Parameters
1	Add the following lines in the file /etc/sysctl.conf sysctl -p	kernel.shmall = Physical Memory / page size [ getconf PAGE_SIZE=4 ] kernel.shmmax = 1/2 of the RAM  [Should not greater than 4GB] kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 fs.file-max = 512 * Processes [Min 6815744] fs.aio-max-nr = 1048576 net.ipv4.ip_local_port_range = 9000 65500   [Must match Exactly] net.core.rmem_default = 262144 net.core.rmem_max = 4194304 net.core.wmem_default = 262144  net.core.wmem_max = 1048576 aio-max-nr = 1048576
	/proc/sys/kernel/sem	semmsl = 250 semmns = 32000 semopm = 100 semmni = 128
	Create groups and user
1	Create Oracle Groups and User	# groupadd oinstall # groupadd dba # useradd -g  oinstall  -G dba oracle # password oraclecreate directory and give the ownership# mkdir  -p /u01/app/oracle # chown -R oracle:oinstall /u01/app/oracleIf the oracle user exists, but its primary group is not oinstall or it is not a member of the dba group, then enter the following command: # /usr/sbin/usermod -g oinstall -G dba oracle
	Set the session Limits for the oracle user
1	Set Shell Limits for the oracle User. Assuming that the “oracle” Unix user will perform the installation,add these lines  /etc/security/limits.conf	oracle  soft    nproc    2047 oracle  hard   nproc    16384 oracle  soft    nofile    1024 oracle  hard    nofile    65536
2	add tohe following lines in /etc/pam.d/login	Add the following linesession required pam_limits.so
3	Add the follwing lines to the /etc/profile	if [ $USER = "oracle" ]; then  if [$SHELL = "/bin/ksh" ]; then      ulimit -u 16384       ulimit -n 65536   else      ulimit -u 16384 -n 65536  fi fi
	gcc –version g++ –version  Should return 4.1.x	4.1.2
	Installation
1	Login as oracle user	./runIntaller
		Screen Shots


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