--- In [email protected], "b.sadhiq" <b.sad...@...> wrote:
>
> --- In [email protected], "gurumeda_msselva"
> <gurumeda_msselva@> wrote:
> >
> > what is /dev/shm & why it is required in linux
> >
>
>
> /dev/shm is nothing but implementation of traditional shared memory
> concept. It is an efficient means of passing data between programs.
> One program will create a memory portion, which other processes (if
> permitted) can access. This will result into speeding up things on
Linux.
>
> If you type mount command you will see /dev/shm as a tempfs file
> system. Therefore, it is a file system, which keeps all files in
> virtual memory. Everything in tmpfs is temporary in the sense that no
> files will be created on your hard drive. If you unmount a tmpfs
> instance, everything stored therein is lost. By default almost all
> distro configured to use /dev/shm.
>
> You can use /dev/shm to improve the performance of application
> software or overall Linux system performance. On heavily loaded
> system, it can make tons of difference. For example VMware
> workstation/server can be optimized to improve your Linux host's
> performance (i.e. improve the performance of your virtual machines).
>
> For example, if you have 8GB RAM then remount /dev/shm as follows:
>
> # mount -o remount,size=8G /dev/shm
>
> To be frank if you have more than 2GB RAM and if you running multiple
> Virtual machines this hack always improves performance.
>
#mount -t tmpfs -o size=5G,nr_inodes=5k,mode=700 tmpfs /disk2/tmpfs
>
B.Sadhiq
>
