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Add additional details to increasing mapped memory. 

Other distro’s do not use /run/shm as the memory mapped path, so added
information to cover this case.

Also filtered the output of df to focus our attention on the only mount
points that matter here.
This commit is contained in:
Ian 2016-11-03 22:43:07 -07:00
parent bd47439056
commit 749a90f199
1 changed files with 5 additions and 11 deletions
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16
docs/faq.rst
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@ -96,22 +96,16 @@ A sample output on Ubuntu:
::
pp@camerapc:~$ df -h
pp@camerapc:~$ df -h|grep "Filesystem\|shm"
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 226G 96G 119G 45% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 1.8G 4.0K 1.8G 1% /dev
tmpfs 371M 816K 370M 1% /run
none 5.0M 0 5.0M 0% /run/lock
tmpfs 2.6G 923M 1.7G 36% /run/shm
none 100M 0 100M 0% /run/user
The key item here is tmpfs --> the example above shows we have allocated 1.7G of mapped memory space of which 36% is used which is a healthy number. If you are seeing this to go beyond 70% you should probaby increase mapped memory
The key item here is tmpfs --> the example above shows we have allocated 1.7G of mapped memory space of which 36% is used which is a healthy number. If you are seeing ``Use%`` going beyond 70% you should probaby increase the mapped memory.
If you want to increase this limit to 70% of your memory, add the following to ``/etc/fstab``
``tmpfs /run/shm tmpfs defaults,noexec,nosuid,size=70% 0 0``
For example, if you want to increase this limit to 70% of your memory, add the following to ``/etc/fstab``
``tmpfs SHMPATH tmpfs defaults,noexec,nosuid,size=70% 0 0``
where SHMPATH is the ``Mounted on`` path. Here, that would be ``/run/shm``. Other systems may be ``/dev/shm``.
What does a 'Can't shmget: Invalid argument' error in my logs mean? (and my camera does not display at higher resolutions)