miyamoto moesasji <miyamoto.31b <at> gmail.com> writes:
>
> In setting up tmpfs (so not tmpmfs) on a machine that is using
> zfs(v15, zfs v4) on 8.2prerelease I run out of space on the tmpfs when
> copying a file of ~4.6 GB file from the zfs-filesystem to the memory
> disk. This machine has 8GB of memory backed by swap on the harddisk,
> so I expected the file to copy to memory without problems.
>
....this is in fact worse than I first thought. After leaving the
machine running overnight the tmpfs is reduced to a size of 4K, which
shows that tmpfs is in fact
completely unusable for me. See the output of df:
---
h...@pulsarx4:~/ > df -hi /tmp
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
tmpfs 4.0K 4.0K 0B 100% 18 0 100% /tmp
---
Relevant zfs-stats info:
---
System Memory Statistics:
Physical Memory: 8161.74M
Kernel Memory: 4117.40M
DATA: 99.29% 4088.07M
TEXT: 0.71% 29.33M
ARC Size:
Current Size (arcsize): 63.58% 4370.60M
Target Size (Adaptive, c): 100.00% 6874.44M
Min Size (Hard Limit, c_min): 12.50% 859.31M
Max Size (High Water, c_max): ~8:1 6874.44M
---
I'm not sure what triggered this further reduction in size; but the
above 4K size is probably important to show how dramatic this goes
wrong.
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