World record! (2800 online users)

Hi there,

My objective is to migrate our current mail server under Windows to a new
machine with Linux.

New machine : Domino 653 on SLES 8.0 - HP DL760.

Running server load (R6 mail routing test) - server reach 2800 users
(during 5 hours), it's my world record.

I tried 3500 users but server crashed with error :
** Error attaching to shared memory
[loc=MapSharedRegion,errno=12,ptr=ffffffff] -- check OS kernel
configuration and Notes_SHARED_DPOOLSIZE environment variable.

Can someone reach more online users ? And if yes with which parameters ?

Script Parameter
NOTES_MAXSHAREDMEM      2140053504
NOTES_SHMMNI            8192
NOTES_SEM               250 18432 32 1024
NOTES_USERPROC          4096

Notes.ini Parameter
PercentAvailSysResources      N/A
ConstrainedSHMSizeMb    3048
Server_Max_Concurrent_Trans   200
NSF_DBCACHE_MaxEntries  1500
NSF_Buffer_Pool_size_MB 256


Thanks,
Jerome