string

See Also
For more information, see the chapter on checking filesystem integrity in the System
Administration Guide, Volume I.
"E"
ENOMEM The available data space is not
large enough to accommodate the shared
memory segment
Cause
ENOMEM errors occur after 80 segments have been allocated by Lotus Notes.
Action
The design and implementation of Solaris ISM (Intimate Shared Memory) is what
caused the ENOMEM failures, from the Lotus Notes application, besause of the limit
reached on the number of shared memory segments that can be attached to a
particular process.
The limit occurs because all shared memory segments are attached in the Intimate
Shared Memory (ISM) mode courtesy of a system variable they have set in the
system file called shmsys:share_page_table.
When a shared memory segment is attached in ISM mode, the OS locks that segment
into physical memory and arranges the virtual/physical address mappings such that
only one copy of the mapping information is shared amongst all attaching processes.
To accomplish this, the OS requires the virtual starting address of the segment be
aligned on a 16 Meg (hex 0x1000000) = 16777216-bytes address boundary.
The NULL address lets the system decide what virtual address the segment should
be attached at. The system also assigns addresses 0x3000000 apart unless forced to
attach addresses at 0x1000000 apart.
Doing a few calculations, a sun4d could create and attach up to 220 1-Meg ISM
segments and a sun4m could create and attach up to 235 1-Meg ISM segments,
providing the segments were 0x1000000 apart.
Given that ISM is what causes the limit, what can we do about it?
58 Solaris Common Messages and Troubleshooting Guide ♦ October, 1998