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Full Discussion: WAS 6.1 ND/Lawson ERP/HP-UX 11.23 PA-RISC - unable to attach shared memory segment
Operating Systems HP-UX WAS 6.1 ND/Lawson ERP/HP-UX 11.23 PA-RISC - unable to attach shared memory segment Post 302249963 by mrvitas on Wednesday 22nd of October 2008 12:12:51 PM
Old 10-22-2008
max proc /threads or shmmax
Thank you for the advice. We have reviewed these settings. Here's the kicker, however - another installation, same OS level and patches, same memory, identical kernel params exhibits no errors. So, could this error be a symptom of shared memory? I found an article on HP's site regarding shared memory fragmentation and the inability of a 32-bit app to secure the segment it needs. Could this be my culprit? If not, I'll lookt into increasing max proc /threads and shmmax. Thanks again!
 

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LEARN ABOUT HPUX

shmem

shmem(5)							File Formats Manual							  shmem(5)

NAME

       shmem - enable or disable System V shared memory

DESCRIPTION

       The tunable is obsolete.  The System V IPC shared memory subsystem is always enabled.

       Shared  memory is an efficient InterProcess Communications (IPC) mechanism.  One process creates a shared memory segment and attaches it to
       its address space.  Any processes looking to communicate with this process through the shared memory segment, then attach the shared memory
       segment	to  their  corresponding  address spaces as well.  Once attached, a process can read from or write to the segment depending on the
       permissions specified while attaching it.

WARNINGS

       Installation of optional kernel software, from HP or other vendors, may cause changes to tunable  parameter  values.   After  installation,
       some  tunable  parameters may no longer be at the default or recommended values.  For information about the effects of installation on tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR

       was developed by HP.

SEE ALSO

       shmmax(5), shmmni(5), shmseg(5).

							     Tunable Kernel Parameters							  shmem(5)
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