From: Paul Reilly (pareilly@tcd.ie)
Date: Tue Sep 24 2002 - 11:51:01 EDT
Thanks to all for the quick responses.
The answer is to increase the 'shm_mni' attribute in the IPC subsystem.
Of course I looked at sys_attrs_proc and vm and general, just not ipc!
Responses follow:
-------------------------- start original quetsion ------------------------
Hi gurus,
I have a problem with an application in that it won't execute more than
about 127 times. I think the problem is allocating shared memory, as if
I run the shared memory excerciser "shmx" when near the 127 invocations,
it gives a fault,
shmx: Shmget[0] Fault: No space left on device
whereas on the same unloaded system 'shmx' works ok.
How do I increase the total available shared memory on a 5.1A system? In
4.0 there was a shmmni kernel parameter, but I can't see anything like
that in 5.1.
Any feedback appreciated !
Paul
-------------------------- end original quetsion ----------------------------
-------------------------------------------------------------------------------
From: Jan Mark Holzer
Subject: RE: Increasing Shared Memory: shmx ?
You may want to increase shm_mni in the ipc subsystem.
This parameter controls the maximum number of shared
memory regions that can be used on the system at one
time.
-------------------------------------------------------------------------------
From: "Ballowe, Charles"
Subject: RE: Increasing Shared Memory: shmx ?
there should be a shm_mni variable in the IPC section (dxkerneltuner
or sysconfig should be able to give you information about what it's
set to, sysconfigdb or dxkerneltuner to change it -- or edit your
/etc/sysconfigtab by hand, but that's not necessarily recommended)
man sys_attrs_ipc for information on the variables available in that
section -- note: the sys_attrs* pages are a great resource.
hope that helps
-charlie
-------------------------------------------------------------------------------
From: "Brusche, Johan"
Subject: RE: Increasing Shared Memory: shmx ?
Paul,
Please check the manpage sys_attrs_ipc and look for shm_mni.
Use the command "/sbin/sysconfig -q ipc shm_mni" to check for the
current setting.
sysconfig -Q, tells me you need to reboot to make a new value
in /etc/sysconfigtab effective.
Cheers,
Johan.
-------------------------------------------------------------------------------
From: James W. Caldwell
Subject: Re: Increasing Shared Memory: shmx ?
Look in dxkerneltuner under "ipc" for shm***, alternatively
edit /etc/sysconfigtab by hand and add the shm_*** entries
in the ipc area.
jim
k
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