Shared memory question

[Ramones]

Hi gurus

I have a client that is having problems in access shared memory and getting an shmget error with errno = EINVA.
The size of the segment is not greater than system imposed maximum.
What could be the problem then?


Thanks in advance,
R

[James R. Ferguson]

Hi Ramones:

Is this a 32-bit or a 64-bit process and/or are a mixture of both in play?

See the manpages for 'shmget' and the reasons for errno=EINVAL.

http://docs.hp.com/en/B3921-60631/shmget.2.html

Regards!

...JRF...

[Steven E. Protter]

Shalom,

How much memory is the progam asking for. HP-UX divides memory into certain areas which may be smaller than the value you think the maximum is.

Also if overall system memory is not high enough this could also effect the maximum memory available. Other processes may have the memory locked.

SEP

[Don Morris_1]

Nope, memory exhaustion won't give EINVAL. James linked in the man page -- the cases it describes for EINVAL are it (I started enumerating them and then cross checked and realized there aren't any the man page didn't describe just as well/better than I likely can anyway).

Memory exhaustion is ENOMEM, btw -- regardless of it being physical or virtual memory exhaustion.