Hi friends,
I have installed informix IDS 9.21 FC7 version .
configured all the files ONCONFIG and sqlhosts and /etc/services.
but when i run "oninit -iv"
i am getting this shared memory error.

19:06:16 Event alarms enabled. ALARMPROG = '/informix/ids921fc7/etc/log_full.'
19:06:16 Booting Language <c> from module <>
19:06:16 Loading Module <CNULL>
19:06:16 Booting Language <builtin> from module <>
19:06:16 Loading Module <BUILTINNULL>
19:06:23 Informix Dynamic Server 2000 Version 9.21.FC7 Software Serial Num6
19:06:23 Informix Dynamic Server 2000 Stopped.

19:06:23 mt_shm_remove: WARNING: may not have removed all/correct segments

19:06:16 Event alarms enabled. ALARMPROG = '/informix/ids921fc7/etc/log_full.'
19:06:16 Booting Language <c> from module <>
19:06:16 Loading Module <CNULL>
19:06:16 Booting Language <builtin> from module <>
19:06:16 Loading Module <BUILTINNULL>
19:06:23 Informix Dynamic Server 2000 Version 9.21.FC7 Software Serial Num6
19:06:23 Informix Dynamic Server 2000 Stopped.

$oninit -iv

This action will initialize Informix Dynamic Server 2000;
any existing Informix Dynamic Server 2000 databases will NOT be accessible -
Do you wish to continue (y/n)? y
Checking group membership to determine server run modesucceeded
Reading configuration file '/informix/ids921fc7/etc/yennora.onconfig'...succeedd
Creating /INFORMIXTMP/.infxdirs ... succeeded
Creating infos file "/informix/ids921fc7/etc/.infos.onlineipc_yn" ... "/informid
Writing to infos file ... succeeded
Checking config parameters...succeeded
Allocating and attaching to shared memory...succeeded
Creating resident pool 126016 kbytes...succeeded
Creating buffer pool 127998 kbytes...succeeded
Creating buffer pool 6 kbytes...succeeded
Initializing rhead structure...succeeded
Initializing ASF ...succeeded
Initializing Dictionary Cache and SPL Routine Cache...succeeded
Bringing up ADM VP...succeeded
Creating VP classes...succeeded
Onlining 1 additional cpu vps...succeeded
Onlining 12 IO vps...succeeded
Forking main_loop thread...succeeded
Initializing DR structures...succeeded
Forking 1 'ipcshm' listener threads...succeeded
Forking 1 'soctcp' listener threads...succeeded
Starting tracing...succeeded
Initializing 12 flushers...succeeded
oninit: Not enough room in ROOT DBspace.
Requested 130932K, ONCONFIG value 'ROOTSIZE' 128000K.
oninit: Fatal error in shared memory initialization
$

please can any one help in this

Appreciate your help.

Thanks
Sundar

From the error messages, it looks like your rootsize is too small. Try increasing your ROOTSIZE parameter in your onconfig file to 256000 and try again.