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[Q] Linux kernel 2.4 + informix database ...



HI ?

I  must setting Linux and IIF200 on DELL PowerEdge 6400 server .
This server has 6Gbyes main memory,
      120Gbyes hard disk.

first i have install Redhat 6.2 official.
and i have upgraded kernel 2.4 from kernel 2.2.16 . ( because for awaring
6Gbyes main memory at Linux)
last i have installed IIF2000 .

I want to setting this system like this :
    main memory 6Gbytes awaring.
    Informix using more than 2Gbytes shared memory.

i have some problems.

default , 4G main memory awared at  Kernel 2.2.16 .
             but informix can use only 700Mbytes shared memory .
             caused error shared memory when setting more than 700Mbytes.(at
onconfig file)

6G main memory awared at Kernel 2.4
            but informix can use only 700Mbyes shared memory.
            caused error shared memory when setting more than 700Mbytes.(at
onconfig file)

6G main memory awared at compiled Kernel 2.4 with kernel parameter setting(
SHMMNI,SHMMAX,SEMMNI......)
            informix can not create any shared memory.
I guess per process has limit  shared memory size .
that size is smaller than 1Gbytes.
Someone says no limit shared memory size per process , but i think it is not correct .

I don't know what to do ....

thank .