Difference between revisions of "Centos"
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Then add the following to /etc/fstab: | Then add the following to /etc/fstab: | ||
* /swapfile swap swap defaults 0 0 | * /swapfile swap swap defaults 0 0 | ||
| + | ==Kernel Parameters for Oralce== | ||
| + | * Put in /etc/sysctl.conf | ||
| + | <pre>kernel.sem = 250 32000 100 128 | ||
| + | |||
| + | net.ipv4.ip_local_port_range = 9000 - 65500 | ||
| + | net.core.rmem_default = 262144 | ||
| + | net.core.rmem_max = 4194304 | ||
| + | net.core.wmem_default = 262144 | ||
| + | net.core.wmem_max = 1048576 | ||
| + | fs.aio-max-nr = 1048576 | ||
| + | |||
| + | fs.file-max = 6815744</pre> | ||
| + | ==Changing hard & soft file limits== | ||
| + | * Edit /etc/security/limits.conf | ||
Revision as of 07:00, 27 January 2011
bugs
NFS mount permission denied
Error:
[root@traderdirect ~]# mount 10.93.138.18:/nfs-shares /mounts/tdstorage/ mount: 10.93.138.18:/nfs-shares failed, reason given by server: Permission denied
Solution: /bin/mount -t nfsd nfsd /proc/fs/nfsd See: this bug report
General
Add Swap
TO add a 4 gig swap:
- dd if=/dev/zero of=/swapfile bs=1M count=4096
- mkswap /swapfile
- swapon /swapfile
Then add the following to /etc/fstab:
- /swapfile swap swap defaults 0 0
Kernel Parameters for Oralce
- Put in /etc/sysctl.conf
kernel.sem = 250 32000 100 128 net.ipv4.ip_local_port_range = 9000 - 65500 net.core.rmem_default = 262144 net.core.rmem_max = 4194304 net.core.wmem_default = 262144 net.core.wmem_max = 1048576 fs.aio-max-nr = 1048576 fs.file-max = 6815744
Changing hard & soft file limits
- Edit /etc/security/limits.conf