solaris的/etc/system里面, shmmax到底做什么事情?

asker160

set shmsys:shmnifo_shmmax=xxxxx
这句话是什么含义? 是设置某个进程的内存上限? 某个进程共享内存是使用上限?

icyfish28

shmsys:shminfo_shmmax (Solaris 9 Releases)
Obsolete in the Solaris 10 release.

Description
Maximum size of system V shared memory segment that can be created. This parameter is an upper limit that is checked before the application sees if it actually has the physical resources to create the requested memory segment.

Attempts to create a shared memory section whose size is zero or whose size is larger than the specified value will fail with an EINVAL error.

This parameter specifies only the largest value the operating system can accept for the size of a shared memory segment. Whether the segment can be created depends entirely on the amount of swap space available on the system and, for a 32-bit process, whether there is enough space available in the process's address space for the segment to be attached.

icyfish28

Refer to
Oracle Solaris Tunable Parameters Reference Manual

http://download.oracle.com/docs/cd/E19253-01/817-0404/index.html

asker160

shmsys:shminfo_shmmax (Solaris 9 Releases)
Obsolete in the Solaris 10 release.

Description
Max ...
icyfish28 发表于 2011-07-04 12:18

大虾，你这段话是用man看到的吗，为什么我看不到?
opensolaris 5.11

bash-3.00# man shmsys:shminfo_shmmax
No manual entry for shmsys:shminfo_shmmax.

bj161109