[mythtv-users] sluggish system, potential HD failure, and how best to get back up and runnin

[Simon Hobson]

Hika van den Hoven <hikavdh at gmail.com> wrote:

> But the default
> size for tmpfs is quite small. I believe 8 Mb. If you set it higher
> with ramdisk_size=xxx (in kb) it goes for all tmpfses.

Actually, and I only know this because I was digging up information yesterday for my little box, the default is half the system memory - so 125M on my box with 1/4G RAM. You can specify on a per-filesystem basis with a "size=..." option to mount.
From my little box's fstab :
tmpfs           /tmp            tmpfs   defaults,size=25M           0 0
tmpfs           /var/tmp        tmpfs   defaults,size=25M           0 0
tmpfs           /run            tmpfs   defaults,size=5M,mode=0755  0 0
tmpfs           /var/log        tmpfs   defaults,size=5M,mode=0755  0 0
tmpfs           /run/lock       tmpfs   defaults,size=5M            0 0

Top reports (shortly after clearing the caches) :
top - 13:20:52 up 2 days,  3:20,  1 user,  load average: 0.08, 0.03, 0.05
Tasks:  52 total,   1 running,  51 sleeping,   0 stopped,   0 zombie
%Cpu(s): 15.6 us,  3.1 sy,  0.0 ni, 75.0 id,  0.0 wa,  0.0 hi,  6.2 si,  0.0 st
KiB Mem:    254976 total,    64892 used,   190084 free,      172 buffers
KiB Swap:        0 total,        0 used,        0 free,     7920 cached

And df reports :
Filesystem      Size  Used Avail Use% Mounted on
tmpfs           5.0M  112K  4.9M   3% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            50M     0   50M   0% /run/shm
tmpfs            25M     0   25M   0% /tmp
tmpfs            25M     0   25M   0% /var/tmp
tmpfs           5.0M   24K  5.0M   1% /var/log

I'm fairly confident that I've got things about right for this box :)