Hi All,
First of all, here is what I am using: SCO UnixWare 7.1.1, IDS
7.3.1.
My problem is with shared memory. I have set all of the settings
according to the machine specific notes in the the release note except
for this part:

INFORMIX-OnLine Kernel Parameters:
=================================

SEMMNI: 150
SEMMNS: 60
SEMMSL: 150

Where do these get set?

I changed (as per IDS_7.3 in the release notes):
SHMMNI 200
SHMSEG: 15
SHMMAX: 536870912

and rebuilt the kernel and they all check out using idtune -g <name>.

The error I get in the online.log after onmonitor fails is:

15:46:18 shmat: [EMFILE][24]: out of shared memory segments, check
system SHMSEG

15:46:18 mt_shm_init: can't create virtual segment

Using ipcs and ipcrm I made sure that there were no blocks of shared
memory left hanging around from previous
attempts to initialize.
I have read through the install docs and most of what is relevant on
this group and, unless I missed something (which after the thousands
of lines I have read here I am sure that I have) I am lost as to how
to solve this.

Any suggestions would be greatly appreciated.


Thanks,

John M
mozurkewichj (AT) mps (DOT) k12.mi.us

Here are the settings you requested.
Through the IDS docs that I am using it says to make BUFFERS = 25000,
I tried that but the problem still persists.

NETTYPE ipcshm,1,13,NET
BUFFERS 200
SNVIRTSIZE 80000

Thanks,
John M

I found this post, which you aparently wrote... everything works now.

Thanks,


John M


You must tune kernel variable SHMMAX !
Default for SHMMAX is 128 kB on UW. Together with SHMSEG 6 you can
create 6 shm-segments of 128 KB each.

Increase SHMMAX to the max of 2147483647 and never think of it again:
/etc/conf/bin/idtune SHMMAX 2147483647

Check the other by informix recommended values to (SHM..., SEM...).

Then:
/etc/conf/bin/idbuild -B
shutdown -i6 -y

I found this post that you wrote... it took care of THAT problem anyway.
Thanks,

John M


You must tune kernel variable SHMMAX !
Default for SHMMAX is 128 kB on UW. Together with SHMSEG 6 you can
create 6 shm-segments of 128 KB each.

Increase SHMMAX to the max of 2147483647 and never think of it again:
/etc/conf/bin/idtune SHMMAX 2147483647

Check the other by informix recommended values to (SHM..., SEM...).

Then:
/etc/conf/bin/idbuild -B
shutdown -i6 -y

John M wrote:
But you said in your first post, you already increased SHMMAX and SHMSEG
and build a new kernel an rebooted, if I remember correct.

15 * 536.870.912 = - 7.5 GB -> much more than you need for you informix
config.

?????

Thanks for all of your help. I lowered the amount of initialy
reqquested shared memory and things seem to be working fine.


Thanks,
John M