Some /dev/shm

[Binu_5]

Hi All

Can anybody give some information about
/dev/shm

Thanks
Binu

[Ivan Ferreira · Accepted solution]

/dev/shm stands for Shared Memory.

You need to have kernel tmpfs support in order to use POSIX shared memory. System V shared memory will work without tmpfs in your kernel, however. Note that you do not need a tmpfs filesystem to be mounted for POSIX shared memory to work; you simply need the support in your kernel. POSIX shared memory isn't used too much right now, but this situation will likely change as time goes on.


You can use it to provide shared memory tweaks to applications, like oracle.

See:

http://www-128.ibm.com/developerworks/library/l-fs3.html

http://dba-oracle.com/oracle_news/2005_4_19_getting_large_sga_linux.htm