topic Re: Redhat 4 kernel parameters in Operating System - Linux

Redhat 4 kernel parameters

Robert-Jan Goossens_1 — Mon, 28 Apr 2008 11:54:52 GMT

Hi All,

Need to add some kernel parameters on Redhat 4 AS system for oracle.

shmsys:shminfo_shmmax 61847529062
semsys:seminfo_semmap 1024
semsys:seminfo_semmni 2048
semsys:seminfo_semmns 2048
semsys:seminfo_semmsl 2048
semsys:seminfo_semmnu 2048
semsys:seminfo_semume 200
shmsys:shminfo_shmmin 200
shmsys:shminfo_shmmni 200
shmsys:shminfo_shmseg 256
rlim_fd_max 16384
rlim_fd_cur 16384
udp:xmit_hiwat 262144
udp:udp_recv_hiwat 262144

The oracle install guide confused me, can I add the parameters to the /etc/sysctl.conf or should I add them to /proc/sys/kernel/sem , /proc/sys/kernel/shmmax, /proc/sys/kernel/shmmni?

Best regards,
Robert-Jan

Re: Redhat 4 kernel parameters

Steven E. Protter — Mon, 28 Apr 2008 12:03:20 GMT

Shalom Robert-Jan

/etc/sysctl.conf

Thats the place to make permanent changes.

Writing them to /proc/sys/ permits erasure on the next reboot.

SEP

Re: Redhat 4 kernel parameters

Robert-Jan Goossens_1 — Mon, 28 Apr 2008 12:30:18 GMT

Shalom Steven,

Thanks for your quick responce!!!

Btw I think the first paragraph of the Install guide should be removed! :-)

Best regards,
Robert-Jan

Re: Redhat 4 kernel parameters

Ivan Ferreira — Mon, 28 Apr 2008 12:58:47 GMT

After you modify sysctl.conf, you can run sysctl -p to apply the changes without reboot.

Re: Redhat 4 kernel parameters

Robert-Jan Goossens_1 — Mon, 28 Apr 2008 13:55:41 GMT

Solved! Thanks Steven