[CentOS] Semaphore setup on database???

we are tried setup CENTOS 4.6 with Informix Dynamic server version 10 UC8 on DELL 6800.
   
  The problem we have is while doing bdatabase backup (ontape), we have error happen.  I guess the error come from "semaphoe".  server semaphore are:
   
  # sysctl -a|grep sem
kernel.sem = 250        32000   128  128
  # sysctl -a|grep shm
vm.hugetlb_shm_group = 0
kernel.shmmni = 4096
kernel.shmall = 4194304
kernel.shmmax = 2147483648
   
  Does anyone has ideal what semaphore should setup in Informix?
   
  Thanks.

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