The typical Oracle installation will require more swap space on a system, due to prerequisite checks performed by the installer, than is typical available. The following procedure shows how to create additional swap in Unix or Linux.
1. Create a file on /u01 of 12gb with the dd command. NOTE: Repeat on each RAC node.
dd if=/dev/zero of=/u01/tempswap bs=1k count=12000000
Example:
[root@mylinux1 ~]# dd if=/dev/zero of=/u01/tempswap bs=1k count=12000000
12000000+0 records in
12000000+0 records out
12384000000 bytes (12 GB) copied, 64.2111 seconds, 255 MB/s
[root@mylinux1 ~]#
2. Then format your new file with the mke2fs command. NOTE: Repeat on each RAC node.
/sbin/mke2fs /u01/tempswap
Example:
[root@mylinux1 ~]# /sbin/mke2fs /u01/tempswap
mke2fs 1.39 (29-May-2006)
/u01/tempswap is not a block special device.
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
2003424 inodes, 4000000 blocks
200000 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4097835008
123 block groups
32768 blocks per group, 32768 fragments per group
12288 inodes per group
Superblock backups stored on blocks:
32768, 98304, 123840, 229376, 294912, 819200, 884736, 1205632, 2654208
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 29 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@mylinux1 ~]#
3. Make the additional swap space with the mkswap command. NOTE: Repeat on each RAC node.
/sbin/mkswap /u01/tempswap
Example:
[root@mylinux1 ~]# /sbin/mkswap /u01/tempswap
Setting up swapspace version 1, size = 12383995 kB
[root@mylinux1 ~]#
4. Make the swap space available to the OS with the command swapon. NOTE: This will have to be executed after every reboot. Repeat on each RAC node.
/sbin/swapon /u01/tempswap
Example:
[root@mylinux1 ~]# /sbin/swapon /u01/tempswap
[root@mylinux1 ~]#
Larry J. Catt, OCP 9i, 10g
oracle@allcompute.com
www.allcompute.com