Стоит Oracle8.1.7.0 RH7.3 1Гб
В sysctl.conf прописал
kernel.shmmax = 536870912
Даю
[oracle@rez oracle]$ tstshm
Number of segments gotten by shmget() = 50
Number of segments attached by shmat() = 50
Segments attach at higher addresses
Maximum size segments are not attached contiguously!
(---И эта строчка наводит меня на нехорошие размышления---)

Segment separation = 2097152 bytes
Default shared memory address = 0x40607000
Lowest shared memory address = 0x40607000
Highest shared memory address = 0x41e07000
Total shared memory range = 27262976
Total shared memory attached = 104857600
Largest single segment size = 2097152
Segment boundaries (SHMLBA) = 4096 (0x1000)

Так ли это должно быть или иначе