On 20120325_010923, Stan Hoeppner wrote:
On 3/24/2012 4:02 PM, Javier Vasquez wrote:
2012/3/24 shirish शिरीष shirisha...@gmail.com:
# TMPFS_SIZE: maximum size for all tmpfs filesystems if no specific
# size is provided. If no value is provided here, the kernel default
# will be used.
TMPFS_SIZE=20%
See, this is as you wish. This particular setting is the maximum for
ALL of the tmpfs space. Kind of the default if nothing else is
specified. You might not touch this if you don't want. So I would
not be afraid of using 100% of RAM here.
That's probably not a smart idea:
http://www.kernel.org/doc/Documentation/filesystems/tmpfs.txt
...
tmpfs has three mount options for sizing:
size: The limit of allocated bytes for this tmpfs instance. The
default is half of your physical RAM without swap. If you
oversize your tmpfs instances the machine will deadlock
since the OOM handler will not be able to free that memory.
...
The OP would likely be far better off simply mounting /tmp on his root
filesystem as was always done in the past. Application developers
writing to /tmp aren't expecting memory speed transfers of such files
because of the traditional placement of /tmp. And he'll have more than
enough space, many times his RAM quantity.
FWIW, my Squeeze servers are all upgrades going back to Sarge, IIRC.
Here's my /tmp setup:
$ df /tmp
FilesystemTypeSize Used Avail Use% Mounted on
/dev/sda2 ext2 33G 3.8G 28G 12% /
I'm sure some/many of you will gasp at that fact I still use EXT2. If
it ain't broke, don't fix it. The /boot and root filesystems are on
EXT2, with all data storage on XFS. Never had problems with EXT2 in
this setup, so it lives on, for now.
--
Stan
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OK, Stan,
I'm convinced by your argument, but I'm not ready to switch to XFS and
ext2. My root partition is ext3 and contains plenty of space (~50GB)
for /tmp. Also, I have been being bothered by running out of space for
intermediate files during 'sort' of largish files. So, ... how do I
shut down tmpfs? On my plain vanilla wheezy tmpfs seems also to be
involved in something called rootfs which is in use. Do I have to
reboot to get rid of the tmpfs mount of /tmp? On this machine, I have
a 60GB partition that I have been using with the -T option in sort to
make it work again, but I can't make that partition BE mounted as /tmp
until I have umount-ed the tmpfs mount at /tmp. At least that is what
I think my problem is.
TIA
--
Paul E Condon
pecon...@mesanetworks.net
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