Hi all,

Attempting to create a shared memory db using 4.4.16 on a Linux
2.4.21-20.ELsmp. I'm getting an dbenvp->open() error.

The set_errfile shows:
SharedMemoryCache: shmget: key: 667: unable to create shared system
memory region: Invalid argument
SharedMemoryCache: PANIC: Invalid argument
SharedMemoryCache: unable to join the environment

the open() is called as follows:
first set_shm_key(602) is called
dbenvp->open(fullName.c_str(),
DB_CREATE,DB_INIT_LOCK,DB_INIT_LOG,DB_INIT_MPOOL,D B_INIT_TXN,DB_SYSTEM_MEM,DB_REGISTER,DB_THREAD,DB_ RECOVER,
S_IRWXU );

% ipcs

------ Shared Memory Segments --------
key shmid owner perms bytes nattch
status
0x0000029a 1572865 mez 600 24576 0

Any help would be greatly appreciated and yes, I'm a berkeley newbie.

Looks like the problem stemmed from the set_cachesize value not being a
power of 2. Also the cxx call must include the power sign eg 2^18
works where 262144 does not.